MFRC50001T/0FE,112_技术文档

MFRC500

Highly Integrated ISO/IEC 14443 A Reader IC

Rev. 3.3 — 15 March 2010

048033

Product data sheet

PUBLIC

1. Introduction

This data sheet describes the functionality of the MFRC500 Integrated Circuit (IC). It

includes the functional and electrical specifications and from a system and hardware

viewpoint gives detailed information on how to design-in the device.

Remark: The MFRC500 supports all variants of the MIFARE Classic, MIFARE 1K and

MIFARE 4K RF identification protocols. To aid readability throughout this data sheet, the

MIFARE Classic, MIFARE 1K and MIFARE 4K products and protocols have the generic

name MIFARE.

2. General description

The MFRC500 is a member of a new family of highly integrated reader ICs for contactless

communication at 13.56 MHz. This family of reader ICs provide:

• outstanding modulation and demodulation for passive contactless communication

• a wide range of methods and protocols

• pin compatibility with the CLRC632, MFRC530, MFRC531 and SLRC400

All protocol layers of the ISO/IEC 14443 A are supported

The receiver module provides a robust and efficient demodulation/decoding circuitry

implementation for compatible transponder signals (see Section 9.10 on page 30). The

digital module, manages the complete ISO/IEC 14443 A standard framing and error

detection (parity and CRC). In addition, it supports the fast Crypto1 security algorithm for

authenticating the MIFARE products (see Section 9.12 on page 35).

The internal transmitter module (Section 9.9 on page 27) can directly drive an antenna

designed for a proximity operating distance up to 100 mm without any additional active

circuitry.

A parallel interface can be directly connected to any 8-bit microprocessor to ensure

reader/terminal design flexibility.

MFRC500

NXP Semiconductors

Highly Integrated ISO/IEC 14443 A Reader IC

3. Features and benefits

3.1 General

Highly integrated analog circuitry for demodulating and decoding card response

Buffered output drivers enable antenna connection using the minimum of external

components

Proximity operating distance up to 100 mm

Supports the ISO/IEC 14443 A standard, parts 1 to 4

Supports MIFARE Classic protocol

Crypto1 and secure non-volatile internal key memory

Pin-compatible with the CLRC632, MFRC530, MFRC531 and the SLRC400

Parallel microprocessor interface with internal address latch and IRQ line

Flexible interrupt handling

Automatic detection of parallel microprocessor interface type

64-byte send and receive FIFO buffer

Hard reset with low power function

Software triggered Power-down mode

Programmable timer

Unique serial number

User programmable start-up configuration

Bit-oriented and byte oriented framing

Independent power supply pins for analog, digital and transmitter modules

Internal oscillator buffer optimized for low phase jitter enables 13.56 MHz quartz

connection

Clock frequency filtering

3.3 V operation for transmitter in short range and proximity applications

4. Applications

Electronic payment systems

Identification systems

Access control systems

Subscriber services

Banking systems

Digital content systems

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5. Quick reference data

Table 1.

Symbol

T_amb

Quick reference data

Parameter

Conditions

Min

−40

−0.5

−1.0

-

Typ

Max

Unit

°C

V

ambient temperature

storage temperature

digital supply voltage

analog supply voltage

TVDD supply voltage

-

+150

+6

T_stg

-

V_DDD

+5

-

V_DDA

+6

V

V_DD(TVDD)

|V_i|

+6

V

input voltage (absolute

value)

on any digital pin to DVSS

on pin RX to AVSS

V_DDD+ 0.5

V_DDA+ 0.5

+1.0

V

-

V

I_LI

input leakage current

TVDD supply current

-

mA

I_DD(TVDD)

continuous wave

-

150

6. Ordering information

Table 2.

Ordering information

Type number

Package

Name

Description

Version

MFRC50001T/0FE SO32

plastic small outline package; 32 leads; body width 7.5 mm

SOT287-1

MFRC500_33

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Highly Integrated ISO/IEC 14443 A Reader IC

7. Block diagram

NWR NRD NCS

ALE

21

A0 A1 A2

22 23 24

AD0 to AD7/D0 to D7

13 14 15 16 17 18 19 20

10

11

9

VOLTAGE

MONITOR

AND

POWER ON

DETECT

25

12

PARALLEL INTERFACE CONTROL

(INCLUDING AUTOMATIC INTERFACE DETECTION AND SYNCHRONISATION)

DVDD

DVSS

STATE MACHINE

FIFO CONTROL

64-BYTE FIFO

COMMAND REGISTER

RESET

CONTROL

PROGRAMMABLE TIMER

INTERRUPT CONTROL

POWER DOWN 31

CONTROL

CONTROL REGISTER

BANK

RSTPD

IRQ

2

CRC16/CRC8

GENERATION AND CHECK

EEPROM

ACCESS

32 × 16-BYTE

EEPROM

CONTROL

PARALLEL/SERIAL CONVERTER

BIT COUNTER

MASTER KEY BUFFER

CRYPTO1 UNIT

PARITY GENERATION AND CHECK

FRAME GENERATION AND CHECK

BIT DECODING

BIT ENCODING

32-BIT PSEUDO

RANDOM GENERATOR

3

4

MFIN

SERIAL DATA SWITCH

MFOUT

LEVEL SHIFTERS

1

CLOCK

AMPLITUDE

RATING

OSCIN

CORRELATION

AND

BIT DECODING

GENERATION,

FILTERING AND

DISTRIBUTION

OSCILLATOR

32

REFERENCE

VOLTAGE

OSCOUT

26

AVDD

AVSS

Q-CLOCK

GENERATION

POWER ON

DETECT

28

I-CHANNEL

AMPLIFIER

Q-CHANNEL

AMPLIFIER

ANALOG

TEST

MULTIPLEXER

I-CHANNEL

DEMODULATOR

Q-CHANNEL

DEMODULATOR

TRANSMITTER CONTROL

GND

V

GND

8

V

30

27

29

RX

5

7

6

VMID

AUX

TVSS

TX1

TX2

TVDD

001aaj629

Fig 1. MFRC500 block diagram

MFRC500_33

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8. Pinning information

1

2

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

OSCIN

IRQ

OSCOUT

RSTPD

VMID

3

MFIN

4

MFOUT

TX1

RX

5

AVSS

6

TVDD

AUX

7

TX2

AVDD

8

TVSS

DVDD

A2

MFRC500

9

NCS

10

11

12

13

14

15

16

NWR/R/NW/nWrite

NRD/NDS/nDStrb

DVSS

A1

A0/nWait

ALE/AS/nAStrb

D7/AD7

D6/AD6

D5/AD5

D4/AD4

AD0/D0

AD1/D1

AD2/D2

AD3/D3

001aal483

Fig 2. MFRC500 pin configuration

8.1 Pin description

Table 3.

Pin description

Symbol

Type^[1]

Description

1

OSCIN

I

oscillator/clock inputs:

crystal oscillator input to the oscillator’s inverting amplifier

externally generated clock input; f_clk(ext)= 13.56 MHz

interrupt request: generates an output signaling an interrupt event

ISO/IEC 14443 A MIFARE serial data interface input

serial data ISO/IEC 14443 A output

2

IRQ

O

I

3

4^[2]

MFIN

MFOUT

TX1

O

P

O

G

I

5

transmitter 1 modulated carrier output; 13.56 MHz

transmitter power supply for the TX1 and TX2 output stages

transmitter 2 modulated carrier output; 13.56 MHz

transmitter ground for the TX1 and TX2 output stages

6

TVDD

TX2

7

8

TVSS

NCS

9

not chip select input is used to select and activate the MFRC500’s microprocessor

interface

10^[3]

NWR

I

not write input generates the strobe signal for writing data to the MFRC500

registers when applied to pins D0 to D7

R/NW

nWrite

NRD

I

read not write input is used to switch between read or write cycles

not write input selects the read or write cycle to be performed

11^[3]

not read input generates the strobe signal for reading data from the MFRC500

registers when applied to pins D0 to D7

NDS

I

not data strobe input generates the strobe signal for the read and write cycles

nDStrb

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Table 3.

Pin description …continued

Symbol

Type^[1]

Description

12

DVSS

G

digital ground

13 to 20^[3]D0 to D7

AD0 to AD7

ALE

I/O

8-bit bidirectional data bus input/output on pins D0 to D7

8-bit bidirectional address and data bus input/output on pins AD0 to AD7

address latch enable input for pins AD0 to AD5; HIGH latches the internal address

address strobe input for pins AD0 to AD5; HIGH latches the internal address

not address strobe input for pins AD0 to AD5; LOW latches the internal address

address line 0 is the address register bit 0 input

not wait output:

I/O

21^[3]

I

AS

I

nAStrb

A0

I

22^[3]

I

nWait

O

LOW starts an access cycle

HIGH ends an access cycle

23

24^[3]

A1

I

address line 1 is the address register bit 1 input

address line 2 is the address register bit 2 input

digital power supply

A2

I

25

DVDD

AVDD

AUX

P

O

26

analog power supply for pins OSCIN, OSCOUT, RX, VMID and AUX

27

auxiliary output is used to generate analog test signals. The output signal is

selected using the TestAnaSelect register’s TestAnaOutSel[4:0] bits

28

29

AVSS

RX

G

I

analog ground

receiver input is used as the card response input. The carrier is load modulated at

13.56 MHz, drawn from the antenna circuit

30

31

VMID

P

I

internal reference voltage pin provides the internal reference voltage as a supply

Remark: It must be connected to a 100 nF block capacitor connected between pin

VMID and ground

RSTPD

reset and power-down input:

HIGH: the internal current sinks are switched off, the oscillator is inhibited and

the input pads are disconnected

LOW (negative edge): start internal reset phase

32

OSCOUT

O

crystal oscillator output for the oscillator’s inverting amplifier

[1] Pin types: I = Input, O = Output, I/O = Input/Output, P = Power and G = Ground.

[2] The SLRC400 uses pin name SIGOUT for pin MFOUT. The MFRC500 functionality includes test functions for the SLRC400 using pin

MFOUT.

[3] These pins provide different functionality depending on the selected microprocessor interface type (see Section 9.1 on page 7 for

detailed information).

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Product data sheet

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Highly Integrated ISO/IEC 14443 A Reader IC

9. Functional description

9.1 Digital interface

9.1.1 Overview of supported microprocessor interfaces

The MFRC500 supports direct interfacing to various 8-bit microprocessors. Alternatively,

the MFRC500 can be connected to a PC’s Enhanced Parallel Port (EPP). Table 4 shows

the parallel interface signals supported by the MFRC500.

Table 4.

Supported microprocessor and EPP interface signals

Bus control signals

Bus

Separated address

and data bus

Multiplexed address and data bus

Separated read and

write strobes

control

NRD, NWR, NCS

NRD, NWR, NCS, ALE

AD0, AD1, AD2, AD3, AD4, AD5

AD0 to AD7

address A0, A1, A2

data

D0 to D7

Common read and write control

strobe

R/NW, NDS, NCS

R/NW, NDS, NCS, AS

AD0, AD1, AD2, AD3, AD4, AD5

AD0 to AD7

address A0, A1, A2

data

D0 to D7

Common read and write control

strobe with handshake

-

nWrite, nDStrb, nAStrb, nWait

AD0, AD1, AD2, AD3, AD4, AD5

AD0 to AD7

(EPP)

address

data

9.1.2 Automatic microprocessor interface detection

After a Power-On or Hard reset, the MFRC500 resets the parallel microprocessor

interface mode and detects the microprocessor interface type.

The MFRC500 identifies the microprocessor interface using the logic levels on the control

pins. This is performed using a combination of fixed pin connections and the dedicated

Initialization routine (see Section 9.7.4 on page 25).

MFRC500_33

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9.1.3 Connection to different microprocessor types

The connection to various microprocessor types is shown in Table 5.

Table 5.

Connection scheme for detecting the parallel interface type

Parallel interface type and signals

MFRC500

pins

Separated read/write strobe Common read/write strobe

Dedicated

Multiplexed Dedicated

Multiplexed Multiplexed

address bus

address

bus

address bus address bus address bus with

handshake

ALE

A2

HIGH

A2

ALE

HIGH

A2

AS

nAStrb

HIGH

LOW

HIGH

NRD

NWR

NCS

LOW

A1

HIGH

LOW

HIGH

A0

nWait

NRD

NWR

NCS

D7 to D0

NRD

NWR

NCS

D7 to D0

NDS

R/NW

NCS

NDS

nDStrb

nWrite

LOW

R/NW

NCS

AD7 to AD0 D7 to D0

AD7 to AD0

9.1.3.1 Separate read and write strobe

DEVICE

NCS

DEVICE

NCS

address bus (A3 to An)

non-multiplexed address

ADDRESS

DECODER

ADDRESS

DECODER

LOW

HIGH

A2

A1

A0

address bus (A0 to A2)

data bus (D0 to D7)

A0 to A2

D0 to D7

multiplexed address/data (AD0 to AD7)

AD0 to AD7

HIGH

address latch enable (ALE)

Read strobe (NRD)

ALE

Read strobe (NRD)

Write strobe (NWR)

NRD

NWR

NRD

NWR

Write strobe (NWR)

001aak607

Fig 3. Connection to microprocessor: separate read and write strobes

Refer to Section 13.4.1 on page 86 for timing specification.

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9.1.3.2 Common read and write strobe

DEVICE

NCS

DEVICE

NCS

address bus (A3 to An)

non-multiplexed address

ADDRESS

DECODER

ADDRESS

DECODER

LOW

HIGH

LOW

A2

A1

A0

address bus (A0 to A2)

data bus (D0 to D7)

A0 to A2

D0 to D7

multiplexed address/data (AD0 to AD7)

AD0 to AD7

HIGH

Address strobe (AS)

Data strobe (NDS)

Read/Write (R/NW)

ALE

Data strobe (NDS)

Read/Write (R/NW)

NRD

NWR

NRD

NWR

001aak608

Fig 4. Connection to microprocessor: common read and write strobes

Refer to Section 13.4.2 on page 87 for timing specification.

9.1.3.3 Common read and write strobe: EPP with handshake

DEVICE

NCS

LOW

HIGH

A2

A1

A0

HIGH

nWait

multiplexed address/data (AD1 to AD8)

AD0 to AD7

Address strobe (nAStrb)

Data strobe (nDStrb)

Read/Write (nWrite)

ALE

NRD

NWR

001aak609

Fig 5. Connection to microprocessor: EPP common read/write strobes and handshake

Refer to Section 13.4.3 on page 88 for timing specification.

Remark: In the EPP standard a chip select signal is not defined. To cover this situation,

the status of the NCS pin can be used to inhibit the nDStrb signal. If this inhibitor is not

used, it is mandatory that pin NCS is connected to pin DVSS.

Remark: After each Power-On or Hard reset, the nWait signal on pin A0 is

high-impedance. nWait is defined as the first negative edge applied to the nAStrb pin after

the reset phase. The MFRC500 does not support Read Address Cycle.

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9.2 Memory organization of the EEPROM

Table 6.

Block

Position Address

EEPROM memory organization diagram

Byte address Access Memory content Refer to

0

00h to 0Fh

R

product

information field

Section 9.2.1 on page 11

Section 9.2.2.1 on page 11

1

10h to 1Fh

R/W

W

StartUp register

initialization file

2

20h to 2Fh

3

30h to 3Fh

register

initialization file

Section 9.2.2.3 “Register

initialization file (read/write)”

on page 13

4

40h to 4Fh

5

50h to 5Fh

6

60h to 6Fh

7

70h to 7Fh

8

80h to 8Fh

keys for Crypto1

Section 9.2.3 on page 13

9

90h to 9Fh

W

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

A

A0h to AFh

B0h to BFh

C0h to CFh

D0h to DFh

E0h to EFh

F0h to FFh

W

B

W

C

W

D

W

E

W

F

W

10

11

12

13

14

15

16

17

18

19

1A

1B

1C

1D

1E

1F

100h to 10Fh

110h to 11Fh

120h to 12Fh

130h to 13Fh

140h to 14Fh

150h to 15Fh

160h to 16Fh

170h to 17Fh

180h to 18Fh

190h to 19Fh

1A0h to 1AFh

1B0h to 1BFh

1C0h to 1CFh

1D0h to 1DFh

1E0h to 1EFh

1F0h to 1FFh

W

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9.2.1 Product information field (read only)

Table 7.

Byte

Symbol CRC

Product information field byte allocation

15 14 13 12 11 10

9

8

7

6

-

5

4

3

2

1

0

Internal

R

Product Serial Number

R

Product Type Identification

R

Access

R

Table 8.

Byte

15

Product information field byte description

Symbol

Access Value Description

CRC

R

-

the content of the product information field

is secured using a CRC byte which is

checked during start-up

14 to 12 Internal

R

-

three bytes for internal trimming parameters

11 to 8 Product Serial Number

a unique four byte serial number for the

device

7 to 5

4 to 0

reserved

R

-

Product Type

Identification

the MFRC500 is a member of a new family

of highly integrated reader ICs. Each

member of the product family has a unique

product type identification. The value of the

product type identification is shown in

Table 9.

Definition

Byte

Product type identification definition

Product type identification bytes

0

1

2

3

4^[1]

Value

30h

88h

F8h

00h

XXh

[1] Byte 4 contains the current version number.

9.2.2 Register initialization files (read/write)

Register initialization from address 10h to address 2Fh is performed automatically during

the initializing phase (see Section 9.7.3 on page 25) using the StartUp register

initialization file.

In addition, the MFRC500 registers can be initialized using values from the register

initialization file when the LoadConfig command is executed (see Section 11.4.1 on

page 79).

Remark: The following points apply to initialization:

• the Page register (addressed using 10h, 18h, 20h, 28h) is skipped and not initialized.

• PreSetxx registers: do not change.

• all reserved register bits set to logic 0: do not change.

9.2.2.1 StartUp register initialization file (read/write)

The EEPROM memory block address 1 and 2 contents are used to automatically set the

register subaddresses 10h to 2Fh during the initialization phase. The default values stored

in the EEPROM during production are shown in Section 9.2.2.2 “Factory default StartUp

register initialization file”.

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The byte assignment is shown in Table 10.

Table 10. Byte assignment for register initialization at start-up

EEPROM byte address

Register address

Remark

skipped

copied

…

10h (block 1, byte 0)

10h

11h

…

11h

…

2Fh (block 2, byte 15)

2Fh

copied

9.2.2.2 Factory default StartUp register initialization file

During the production tests, the StartUp register initialization file is initialized using the

default values shown in Table 11. During each power-up and initialization phase, these

values are written to the MFRC500’s registers.

Table 11. Shipment content of StartUp configuration file

EEPROM Register Value Symbol

Description

byte

address

10h

11h

10h

11h

00h

58h

Page

free for user

TxControl

transmitter pins TX1 and TX2 are switched off, bridge driver

configuration, modulator driven from internal digital circuitry

12h

13h

14h

15h

16h

17h

18h

19h

1Ah

1Bh

1Ch

1Dh

1Eh

12h

13h

14h

15h

16h

17h

18h

19h

1Ah

1Bh

1Ch

1Dh

1Eh

3Fh

19h

13h

00h

73h

08h

ADh

FFh

00h

41h

CwConductance

PreSet13

source resistance of TX1 and TX2 is set to minimum

-

PreSet14

-

ModWidth

PreSet16

pulse width for Miller pulse encoding is set to standard configuration

-

PreSet17

-

Page

free for user

RxControl1

DecoderControl

BitPhase

ISO/IEC 14443 A is set and internal amplifier gain is maximum

bit-collisions always evaluate to HIGH in the data bit stream

BitPhase[7:0] is set to standard configuration

MinLevel[3:0] and CollLevel[3:0] are set to maximum

-

RxThreshold

PreSet1D

RxControl2

use Q-clock for the receiver, automatic receiver off is switched on,

decoder is driven from internal analog circuitry

1Fh

20h

21h

22h

23h

24h

25h

26h

27h

28h

1Fh

20h

21h

22h

23h

24h

25h

26h

27h

28h

00h

06h

03h

63h

00h

ClockQControl

Page

automatic Q-clock calibration is switched on

free for user

RxWait

frame guard time is set to six bit-clocks

ChannelRedundancy channel redundancy is set using ISO/IEC 14443 A

CRCPresetLSB

CRCPresetMSB

PreSet25

CRC preset value is set using ISO/IEC 14443 A

-

MFOUTSelect

PreSet27

pin MFOUT is set LOW

-

Page

free for user

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Table 11. Shipment content of StartUp configuration file …continued

EEPROM Register Value Symbol

Description

byte

address

29h

2Ah

2Bh

2Ch

29h

08h

07h

06h

0Ah

FIFOLevel

WaterLevel[5:0] FIFO buffer warning level is set to standard

configuration

2Ah

TimerClock

TimerControl

TimerReload

TPreScaler[4:0] is set to standard configuration, timer unit restart

function is switched off

2Bh

Timer is started at the end of transmission, stopped at the beginning

of reception

2Ch

TReloadValue[7:0]: the timer unit preset value is set to standard

configuration

2Dh

2Eh

2Fh

2Dh

2Eh

2Fh

02h

00h

IRQPinConfig

PreSet2E

pin IRQ is set to high-impedance

-

PreSet2F

9.2.2.3 Register initialization file (read/write)

The EEPROM memory content from block address 3 to 7 can initialize register

subaddresses 10h to 2Fh when the LoadConfig command is executed (see

Section 11.4.1 on page 79). This command requires the EEPROM starting byte address

as a two byte argument for the initialization procedure.

The byte assignment is shown in Table 12.

Table 12. Byte assignment for register initialization at startup

EEPROM byte address

Register address

Remark

skipped

copied

…

EEPROM starting byte address

EEPROM + 1 starting byte address

10h

11h

…

EEPROM + 31 starting byte address

2Fh

copied

The register initialization file is large enough to hold values for two initialization sets and

up to one block (16-byte) of user data.

Remark: The register initialization file can be read/written by users and these bytes can

be used to store other user data.

After each power-up, the default configuration enables the MIFARE and ISO/IEC 14443 A

protocol.

9.2.3 Crypto1 keys (write only)

MIFARE security requires specific cryptographic keys to encrypt data stream

communication on the contactless interface. These keys are called Crypto1 keys.

9.2.3.1 Key format

Keys stored in the EEPROM are written in a specific format. Each key byte must be split

into lower four bits k0 to k3 (lower nibble) and the higher four bits k4 to k7 (higher nibble).

Each nibble is stored twice in one byte and one of the two nibbles is bit-wise inverted. This

format is a precondition for successful execution of the LoadKeyE2 (see Section 11.6.1 on

page 81) and LoadKey commands (see Section 11.6.2 on page 81).

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Using this format, 12 bytes of EEPROM memory are needed to store a 6-byte key. This is

shown in Figure 6.

Master key byte

0 (LSB)

1

5 (MSB)

Master key bits k7 k6 k5 k4 k7 k6 k5 k4 k3 k2 k1 k0 k3 k2 k1 k0 k7 k6 k5 k4 k7 k6 k5 k4 k3 k2 k1 k0 k3 k2 k1 k0

EEPROM byte

k7 k6 k5 k4 k7 k6 k5 k4 k3 k2 k1 k0 k3 k2 k1 k0

n

n + 1

n + 2

n + 3

n + 10

5Ah

n + 11

A5h

address

5Ah

F0h

5Ah

E1h

Example

001aak640

Fig 6. Key storage format

Example: The value for the key must be written to the EEPROM.

• If the key was: A0h A1h A2h A3h A4h A5h then

• 5Ah F0h 5Ah E1h 5Ah D2h 5Ah C3h 5Ah B4h 5Ah A5h would be written.

Remark: It is possible to load data for other key formats into the EEPROM key storage

location. However, it is not possible to validate card authentication with data which will

cause the LoadKeyE2 command (see Section 11.6.1 on page 81) to fail.

9.2.3.2 Storage of keys in the EEPROM

The MFRC500 reserves 384 bytes of memory in the EEPROM for the Crypto1 keys. No

memory segmentation is used to mirror the 12-byte structure of key storage. Thus, every

byte of the dedicated memory area can be the start of a key.

Example: If the key loading cycle starts at the last byte address of an EEPROM block, (for

example, key byte 0 is stored at 12Fh), the next bytes are stored in the next EEPROM

block, for example, key byte 1 is stored at 130h, byte 2 at 131h up to byte 11 at 13Ah.

Based on the 384 bytes of memory and a single key needing 12 bytes, then up to 32

different keys can be stored in the EEPROM.

Remark: It is not possible to load a key exceeding the EEPROM byte location 1FFh.

9.3 FIFO buffer

An 8 × 64 bit FIFO buffer is used in the MFRC500 to act as a parallel-to-parallel converter.

It buffers both the input and output data streams between the microprocessor and the

internal circuitry of the MFRC500. This makes it possible to manage data streams up to

64 bytes long without needing to take timing constraints into account.

9.3.1 Accessing the FIFO buffer

9.3.1.1 Access rules

The FIFO buffer input and output data bus is connected to the FIFOData register. Writing

to this register stores one byte in the FIFO buffer and increments the FIFO buffer write

pointer. Reading from this register shows the FIFO buffer contents stored at the FIFO

buffer read pointer and increments the FIFO buffer read pointer. The distance between the

write and read pointer can be obtained by reading the FIFOLength register.

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When the microprocessor starts a command, the MFRC500 can still access the FIFO

buffer while the command is running. Only one FIFO buffer has been implemented which

is used for input and output. Therefore, the microprocessor must ensure that there are no

inadvertent FIFO buffer accesses. Table 13 gives an overview of FIFO buffer access

during command processing.

Table 13. FIFO buffer access

Active

FIFO buffer

Remark

command

μp Write

μp Read

StartUp

Idle

-

Transmit

Receive

Transceive

yes

-

yes

the microprocessor has to know the state of the

command (transmitting or receiving)

WriteE2

ReadE2

yes

-

yes

the microprocessor has to prepare the arguments,

afterwards only reading is allowed

LoadKeyE2

LoadKey

yes

-

Authent1

Authent2

LoadConfig

CalcCRC

yes

9.3.2 Controlling the FIFO buffer

In addition to writing to and reading from the FIFO buffer, the FIFO buffer pointers can be

reset using the FlushFIFO bit. This changes the FIFOLength[6:0] value to zero, bit

FIFOOvfl is cleared and the stored bytes are no longer accessible. This enables the FIFO

buffer to be written with another 64 bytes of data.

9.3.3 FIFO buffer status information

The microprocessor can get the following FIFO buffer status data:

• the number of bytes stored in the FIFO buffer: bits FIFOLength[6:0]

• the FIFO buffer full warning: bit HiAlert

• the FIFO buffer empty warning: bit LoAlert

• the FIFO buffer overflow warning: bit FIFOOvfl.

Remark: Setting the FlushFIFO bit clears the FIFOOvfl bit.

The MFRC500 can generate an interrupt signal when:

• bit LoAlertIRq is set to logic 1 and bit LoAlert = logic 1, pin IRQ is activated.

• bit HiAlertIRq is set to logic 1 and bit HiAlert = logic 1, pin IRQ activated.

The HiAlert flag bit is set to logic 1 only when the WaterLevel[5:0] bits or less can be

stored in the FIFO buffer. The trigger is generated by Equation 1:

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HiAlert = (64 – FIFOLength) ≤ WaterLevel

(1)

The LoAlert flag bit is set to logic 1 when the FIFOLevel register’s WaterLevel[5:0] bits or

less are stored in the FIFO buffer. The trigger is generated by Equation 2:

LoAlert = FIFOLength ≤ WaterLevel

(2)

9.3.4 FIFO buffer registers and flags

Table 14 shows the related FIFO buffer flags in alphabetic order.

Table 14. Associated FIFO buffer registers and flags

Flags

Register name

FIFOLength

ErrorFlag

Bit

Register address

FIFOLength[6:0]

FIFOOvfl

6 to 0

04h

0Ah

09h

03h

06h

07h

03h

06h

07h

29h

4

FlushFIFO

HiAlert

Control

0

PrimaryStatus

InterruptEn

InterruptRq

PrimaryStatus

InterruptEn

InterruptRq

FIFOLevel

1

HiAlertIEn

HiAlertIRq

LoAlert

1

0

LoAlertIEn

LoAlertIRq

WaterLevel[5:0]

0

5 to 0

9.4 Interrupt request system

The MFRC500 indicates interrupt events by setting the PrimaryStatus register bit IRq (see

Section 10.5.1.4 “PrimaryStatus register” on page 45) and activating pin IRQ. The signal

on pin IRQ can be used to interrupt the microprocessor using its interrupt handling

capabilities ensuring efficient microprocessor software.

9.4.1 Interrupt sources overview

Table 15 shows the integrated interrupt flags, related source and setting condition. The

interrupt TimerIRq flag bit indicates an interrupt set by the timer unit. Bit TimerIRq is set

when the timer decrements from one down to zero (bit TAutoRestart disabled) or from one

to the TReLoadValue[7:0] with bit TAutoRestart enabled.

Bit TxIRq indicates interrupts from different sources and is set as follows:

• the transmitter automatically sets the bit TxIRq interrupt when it is active and its state

changes from sending data to transmitting the end of frame pattern

• the CRC coprocessor sets the bit TxIRq after all data from the FIFO buffer has been

processed indicated by bit CRCReady = logic 1

• when EEPROM programming is finished, the bit TxIRq is set and is indicated by bit

E2Ready = logic 1

The RxIRq flag bit indicates an interrupt when the end of the received data is detected.

The IdleIRq flag bit is set when a command finishes and the content of the Command

register changes to Idle.

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When the FIFO buffer reaches the HIGH-level indicated by the WaterLevel[5:0] value (see

Section 9.3.3 on page 15) and bit HiAlert = logic 1, then the HiAlertIRq flag bit is set to

logic 1.

When the FIFO buffer reaches the LOW-level indicated by the WaterLevel[5:0] value (see

Section 9.3.3 and bit LoAlert = logic 1, then LoAlertIRq flag bit is set to logic 1.

Table 15. Interrupt sources

Interrupt flag

TimerIRq

TxIRq

Interrupt source

timer unit

Trigger action

timer counts from 1 to 0

transmitter

a data stream, transmitted to the card, ends

all data from the FIFO buffer has been processed

CRC coprocessor

EEPROM

all data from the FIFO buffer has been

programmed

RxIRq

receiver

a data stream, received from the card, ends

command execution finishes

FIFO buffer is full

IdleIRq

Command register

FIFO buffer

HiAlertIRq

LoAlertIRq

FIFO buffer is empty

9.4.2 Interrupt request handling

9.4.2.1 Controlling interrupts and getting their status

The MFRC500 informs the microprocessor about the interrupt request source by setting

the relevant bit in the InterruptRq register. The relevance of each interrupt request bit as

source for an interrupt can be masked by the InterruptEn register interrupt enable bits.

Table 16. Interrupt control registers

Register

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

InterruptEn

InterruptRq

SetIEn

SetIRq

reserved

TimerIEn

TimerIRq

TxIEn

TxIRq

RxIEn

RxIRq

IdleIEn

IdleIRq

HiAlertIEn LoAlertIEn

HiAlertIRq LoAlertIRq

If an interrupt request flag is set to logic 1 (showing that an interrupt request is pending)

and the corresponding interrupt enable flag is set, the PrimaryStatus register IRq flag bit is

set to logic 1. Different interrupt sources can activate simultaneously and because of this,

all interrupt request bits are OR’ed, coupled to the IRq flag and then forwarded to pin IRQ.

9.4.2.2 Accessing the interrupt registers

The interrupt request bits are automatically set by the MFRC500’s internal state

machines. In addition, the microprocessor can also set or clear the interrupt request bits

as required.

A special implementation of the InterruptRq and InterruptEn registers enables changing

an individual bit status without influencing any other bits. If an interrupt register is set to

logic 1, bit SetIxx and the specific bit must both be set to logic 1 at the same time. Vice

versa, if a specific interrupt flag is cleared, zero must be written to the SetIxx and the

interrupt register address must be set to logic 1 at the same time.

If a content bit is not changed during the setting or clearing phase, zero must be written to

the specific bit location.

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Example: Writing 3Fh to the InterruptRq register clears all bits. SetIRq is set to logic 0

while all other bits are set to logic 1. Writing 81h to the InterruptRq register sets LoAlertIRq

to logic 1 and leaves all other bits unchanged.

9.4.3 Configuration of pin IRQ

The logic level of the IRq flag bit is visible on pin IRQ. The signal on pin IRQ can also be

controlled using the following IRQPinConfig register bits.

• bit IRQInv: the signal on pin IRQ is equal to the logic level of bit IRq when this bit is set

to logic 0. When set to logic 1, the signal on pin IRQ is inverted with respect to bit IRq.

• bit IRQPushPull: when set to logic 1, pin IRQ has CMOS output characteristics. When

it is set to logic 0, it is an open-drain output which requires an external resistor to

achieve a HIGH-level at pin IRQ.

Remark: During the reset phase (see Section 9.7.2 on page 25) bit IRQInv is set to

logic 1 and bit IRQPushPull is set to logic 0. This results in a high-impedance on pin IRQ.

9.4.4 Register overview interrupt request system

Table 17 shows the related interrupt request system flags in alphabetically.

Table 17. Associated Interrupt request system registers and flags

Flags

Register name

InterruptEn

InterruptRq

InterruptEn

InterruptRq

PrimaryStatus

IRQPinConfig

InterruptEn

InterruptRq

InterruptEn

InterruptRq

InterruptEn

InterruptRq

InterruptEn

InterruptRq

InterruptEn

InterruptRq

Bit

1

2

3

1

0

3

7

5

4

Register address

HiAlertIEn

HiAlertIRq

IdleIEn

06h

07h

06h

07h

03h

07h

06h

07h

06h

07h

06h

07h

06h

07h

06h

07h

IdleIRq

IRq

IRQInv

IRQPushPull

LoAlertIEn

LoAlertIRq

RxIEn

RxIRq

SetIEn

SetIRq

TimerIEn

TimerIRq

TxIEn

TxIRq

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9.5 Timer unit

The timer derives its clock from the 13.56 MHz on-board chip clock. The microprocessor

can use this timer to manage timing-relevant tasks.

The timer unit may be used in one of the following configurations:

• Timeout counter

• WatchDog counter

• Stopwatch

• Programmable one shot

• Periodical trigger

The timer unit can be used to measure the time interval between two events or to indicate

that a specific timed event occurred. The timer is triggered by events but does not

influence any event (e.g. a time-out during data receiving does not automatically influence

the reception process). Several timer related flags can be set and these flags can be used

to generate an interrupt.

9.5.1 Timer unit implementation

9.5.1.1 Timer unit block diagram

Figure 7 shows the block diagram of the timer module.

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TStartTxBegin

TxBegin Event

TStartTxEnd

TxEnd Event

TReloadValue[7:0]

PARALLEL IN

START COUNTER/

PARALLEL LOAD

TAutoRestart

TStartNow

TStopNow

Q

S

R

COUNTER MODULE

(x ≤ x − 1)

TRunning

STOP COUNTER

RxEnd Event

TStopRxEnd

RxBegin Event

TStopRxBegin

TPreScaler[4:0]

TimerValue[7:0]

CLOCK

DIVIDER

13.56 MHz

PARALLEL OUT

Counter = 0 ?

to parallel interface

to interrupt logic: TimerIRq

001aak611

Fig 7. Timer module block diagram

The timer unit is designed, so that events when combined with enabling flags start or stop

the counter. For example, setting bit TStartTxBegin = logic 1 enables control of received

data with the timer unit. In addition, the first received bit is indicated by the TxBegin event.

This combination starts the counter at the defined TReloadValue[7:0].

The timer stops automatically when the counter value is equal to zero or if a defined stop

event happens.

9.5.1.2 Controlling the timer unit

The main part of the timer unit is a down counter. As long as the down counter value is not

zero, it decrements its value with each timer clock cycle.

If the TAutoRestart flag is enabled, the timer does not decrement down to zero. On

reaching value 1, the timer reloads the next clock function with the TReloadValue[7:0].

The timer is started immediately by loading a value from the TimerReload register into the

counter module.

This is activated by one of the following events:

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• transmission of the first bit to the card (TxBegin event) with bit TStartTxBegin = logic 1

• transmission of the last bit to the card (TxEnd event) with bit TStartTxEnd = logic 1

• bit TStartNow is set to logic 1 by the microprocessor

Remark: Every start event reloads the timer from the TimerReload register which

re-triggers the timer unit.

The timer can be configured to stop on one of the following events:

• receipt of the first valid bit from the card (RxBegin event) with bit

TStopRxBegin = logic 1

• receipt of the last bit from the card (RxEnd event) with bit TStopRxEnd = logic 1

• the counter module has decremented down to zero and bit TAutoRestart = logic 0

• bit TStopNow is set to logic 1 by the microprocessor.

Loading a new value, e.g. zero, into the TimerReload register or changing the timer unit

while it is counting will not immediately influence the counter. In both cases, this is

because this register only affects the counter content after a start event.

If the counter is stopped when bit TStopNow is set, no TimerIRq is flagged.

9.5.1.3 Timer unit clock and period

The timer unit clock is derived from the 13.56 MHz on-board chip clock using the

programmable divider. Clock selection is made using the TimerClock register

TPreScaler[4:0] bits based on Equation 3:

2^TPreScaler

--------------------------

1

---------------------------

f_TimerClock

=

[MHz]

(3)

13.56

T_TimerClock

The values for the TPreScaler[4:0] bits are between 0 and 21 which results in a minimum

periodic time (T_TimerClock) of between 74 ns and 150 ms.

The time period elapsed since the last start event is calculated using Equation 4:

TReLoadValue – TimerValue

----------------------------------------------------------------------------

t_Timer

=

[s]

(4)

f_TimerClock

This results in a minimum time period (t_Timer) of between 74 ns and 40 s.

9.5.1.4 Timer unit status

The SecondaryStatus register’s TRunning bit shows the timer’s status. Configured start

events start the timer at the TReloadValue[7:0] and change the status flag TRunning to

logic 1. Conversely, configured stop events stop the timer and set the TRunning status

flag to logic 0. As long as status flag TRunning is set to logic 1, the TimerValue register

changes on the next timer unit clock cycle.

The TimerValue[7:0] bits can be read directly from the TimerValue register.

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9.5.2 Using the timer unit functions

9.5.2.1 Time-out and WatchDog counters

After starting the timer using TReloadValue[7:0], the timer unit decrements the TimerValue

register beginning with a given start event. If a given stop event occurs, such as a bit

being received from the card, the timer unit stops without generating an interrupt.

If a stop event does not occur, such as the card not answering within the expected time,

the timer unit decrements down to zero and generates a timer interrupt request. This

signals to the microprocessor the expected event has not occurred within the given time

(t_Timer).

9.5.2.2 Stopwatch

The time (t_Timer) between a start and stop event is measured by the microprocessor using

the timer unit. Setting the TReloadValue register triggers the timer which in turn, starts to

decrement. If the defined stop event occurs, the timer stops. The time between start and

stop is calculated by the microprocessor using Equation 5 when the time does not

decrement down to zero.

Δt = (TReLoad_value– TimerValue) × t_Timer

(5)

9.5.2.3 Programmable one shot timer and periodic trigger

Programmable one shot timer: The microprocessor starts the timer unit and waits for

the timer interrupt. The interrupt occurs after the time specified by t_Timer

.

Periodic trigger: If the microprocessor sets the TAutoRestart bit, it generates an interrupt

request after every t_Timercycle.

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9.5.3 Timer unit registers

Table 18 shows the related flags of the timer unit in alphabetical order.

Table 18. Associated timer unit registers and flags

Flags

Register name

TimerClock

TimerValue

TimerReload

TimerClock

SecondaryStatus

Control

Bit

Register address

TAutoRestart

TimerValue[7:0]

TReloadValue[7:0]

TPreScaler[4:0]

TRunning

5

2Ah

0Ch

2Ch

2Ah

05h

09h

2Bh

09h

2Bh

7 to 0

4 to 0

7

1

0

1

2

3

TStartNow

TStartTxBegin

TStartTxEnd

TStopNow

TimerControl

Control

TStopRxBegin

TStopRxEnd

TimerControl

9.6 Power reduction modes

9.6.1 Hard power-down

Hard power-down is enabled when pin RSTPD is HIGH. This turns off all internal current

sinks including the oscillator. All digital input buffers are separated from the input pads and

defined internally (except pin RSTPD itself). The output pins are frozen at a given value.

The status of all pins during a hard power-down is shown in Table 19.

Table 19. Signal on pins during Hard power-down

Symbol

OSCIN

IRQ

1

Type

Description

I

not separated from input, pulled to AVSS

high-impedance

2

O

I

MFIN

3

separated from input

LOW

MFOUT

TX1

4

O

5

HIGH, if bit TX1RFEn = logic 1

LOW, if bit TX1RFEn = logic 0

TX2

7

O

HIGH, only if bit TX2RFEn = logic 1 and bit

TX2Inv = logic 0

otherwise LOW

NCS

NWR

NRD

D0 to D7

ALE

A0

9

I

separated from input

high-impedance

10

I

11

I

13 to 20

21

I/O

I

22

I/O

A1

23

I

A2

24

I

AUX

27

O

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Table 19. Signal on pins during Hard power-down …continued

Symbol

29

30

31

32

Type

Description

not changed

pulled to V_DDA

not changed

HIGH

RX

I

VMID

A

I

RSTPD

OSCOUT

O

9.6.2 Soft power-down mode

Soft power-down mode is entered immediately using the Control register bit PowerDown.

All internal current sinks, including the oscillator buffer, are switched off. The digital input

buffers are not separated from the input pads and keep their functionality. In addition, the

digital output pins do not change their state.

After resetting the Control register bit PowerDown, the bit indicating Soft power-down

mode is only cleared after 512 clock cycles. Resetting it does not immediately clear it. The

PowerDown bit is automatically cleared when the Soft power-down mode is exited.

Remark: When the internal oscillator is used, time (t_osc) is required for the oscillator to

become stable. This is because the internal oscillator is supplied by V_DDAand any clock

cycles will not be detected by the internal logic until V_DDAis stable.

9.6.3 Standby mode

The Standby mode is immediately entered when the Control register StandBy bit is set. All

internal current sinks, including the internal digital clock buffer are switched off. However,

the oscillator buffer is not switched off.

The digital input buffers are not separated by the input pads, keeping their functionality

and the digital output pins do not change their state. In addition, the oscillator does not

need time to wake-up.

After resetting the Control register StandBy bit, it takes four clock cycles on pin OSCIN for

Standby mode to exit. Resetting bit StandBy does not immediately clear it. It is

automatically cleared when the Standby mode is exited.

9.6.4 Automatic receiver power-down

It is a power saving feature to switch off the receiver circuit when it is not needed. Setting

bit RxAutoPD = logic 1, automatically powers down the receiver when it is not in use.

Setting bit RxAutoPD = logic 0, keeps the receiver continuously powered up.

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9.7 StartUp phase

The events executed during the StartUp phase are shown in Figure 8.

StartUp phase

t

init

RSTPD

reset

Hard power-

down phase

Initialising

phase

states

Reset phase

ready

001aak613

Fig 8. The StartUp procedure

9.7.1 Hard power-down phase

The hard power-down phase is active during the following cases:

• a Power-On Reset (POR) caused by power-up on pins DVDD or AVDD activated

when V_DDDor V_DDAis below the relevant analog/digital reset threshold.

• a HIGH-level on pin RSTPD which is active while pin RSTPD is HIGH. The HIGH level

period on pin RSTPD must be at least 100 μs (t_PD≥ 100 μs). Shorter phases will not

necessarily result in the reset phase (t_reset). The rising or falling edge slew rate on pin

RSTPD is not critical because pin RSTPD is a Schmitt trigger input.

9.7.2 Reset phase

The reset phase automatically follows the Hard power-down. Once the oscillator is

running stably, the reset phase takes 512 clock cycles. During the reset phase, some

register bits are preset by hardware. The respective reset values are given in the

description of each register (see Section 10.5 on page 43).

Remark: When the internal oscillator is used, time (t_osc) is required for the oscillator to

become stable. This is because the internal oscillator is supplied by V_DDAand any clock

cycles will not be detected by the internal logic until V_DDAis stable.

9.7.3 Initialization phase

The initialization phase automatically follows the reset phase and takes 128 clock cycles.

During the initializing phase the content of the EEPROM blocks 1 and 2 is copied into the

register subaddresses 10h to 2Fh (see Section 9.2.2 on page 11).

Remark: During the production test, the MFRC500 is initialized with default configuration

values. This reduces the microprocessor’s configuration time to a minimum.

9.7.4 Initializing the parallel interface type

A different initialization sequence is used for each microprocessor. This enables detection

of the correct microprocessor interface type and synchronization of the microprocessor’s

and the MFRC500’s start-up. See Section 9.1.3 on page 8 for detailed information on the

different connections for each microprocessor interface type.

During StartUp phase, the command value is set to 3Fh once the oscillator attains clock

frequency stability at an amplitude of > 90 % of the nominal 13.56 MHz clock frequency. At

the end of the initialization phase, the MFRC500 automatically switches to idle and the

command value changes to 00h.

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To ensure correct detection of the microprocessor interface, the following sequence is

executed:

• the Command register is read until the 6-bit register value is 00h. On reading the 00h

value, the internal initialization phase is complete and the MFRC500 is ready to be

controlled

• write 80h to the Page register to initialize the microprocessor interface

• read the Command register. If it returns a value of 00h, the microprocessor interface

was successfully initialized

• write 00h to the Page registers to activate linear addressing mode.

9.8 Oscillator circuit

DEVICE

OSCOUT

OSCIN

13.56 MHz

15 pF

001aak614

Fig 9. Quartz clock connection

The clock applied to the MFRC500 acts as a time basis for the synchronous system

encoder and decoder. The stability of the clock frequency is an important factor for correct

operation. To obtain highest performance, clock jitter must be as small as possible. This is

best achieved by using the internal oscillator buffer with the recommended circuitry.

If an external clock source is used, the clock signal must be applied to pin OSCIN. In this

case, be very careful in optimizing clock duty cycle and clock jitter. Ensure the clock

quality has been verified. It must meet the specifications described in Section 13.4.4 on

page 90.

Remark: We do not recommend using an external clock source.

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9.9 Transmitter pins TX1 and TX2

The signal on pins TX1 and TX2 is the 13.56 MHz energy carrier modulated by an

envelope signal. It can be used to drive an antenna directly, using minimal passive

components for matching and filtering (see Section 15.1 on page 91). To enable this, the

output circuitry is designed with a very low-impedance source resistance. The TxControl

register is used to control the TX1 and TX2 signals.

9.9.1 Configuring pins TX1 and TX2

TX1 pin configurations are described in Table 20.

Table 20. Pin TX1 configurations

TxControl register configuration

Envelope TX1 signal

TX1RFEn

FORCE100ASK

0

1

X

0

1

X

0

1

0

1

LOW (GND)

13.56 MHz carrier frequency modulated

13.56 MHz carrier frequency

LOW

13.56 MHz energy carrier

TX2 pin configurations are described in Table 21.

Table 21. Pin TX2 configurations

TxControl register configuration

Envelope TX2 signal

TX2RFEn FORCE100ASK TX2CW TX2Inv

0

1

X

0

X

0

X

0

X

0

LOW

13.56 MHz carrier frequency

modulated

1

0

1

0

13.56 MHz carrier frequency

modulated, 180° phase-shift

relative to TX1

1

0

1

13.56 MHz carrier frequency,

180° phase-shift relative to TX1

1

0

1

0

1

X

13.56 MHz carrier frequency

13.56 MHz carrier frequency,

180° phase-shift relative to TX1

1

0

1

0

1

0

1

LOW

13.56 MHz carrier frequency

HIGH

13.56 MHz carrier frequency,

180° phase-shift relative to TX1

1

0

1

X

13.56 MHz carrier frequency

13.56 MHz carrier frequency,

180° phase-shift relative to TX1

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9.9.2 Antenna operating distance versus power consumption

Using different antenna matching circuits (by varying the supply voltage on the antenna

driver supply pin TVDD), it is possible to find the trade-off between maximum effective

operating distance and power consumption. Different antenna matching circuits are

described in the Application note “MIFARE Design of MFRC500 Matching Circuit and

Antennas”.

9.9.3 Antenna driver output source resistance

The output source conductance of pins TX1 and TX2 can be adjusted between 1 Ω and

100 Ω using the CwConductance register GsCfgCW[5:0] bits.

The output source conductance of pins TX1 and TX2 during the modulation phase can be

adjusted between 1 Ω and 100 Ω using the ModConductance register GsCfgMod[5:0] bits.

The values are relative to the reference resistance (R_S(ref)) which is measured during the

production test and stored in the MFRC500 EEPROM. It can be read from the product

information field (see Section 9.2.1 on page 11). The electrical specification can be found

in Section 13.3.3 on page 86.

9.9.3.1 Source resistance table

Table 22. TX1 and TX2 source resistance of n-channel driver transistor against GsCfgCW or GsCfgMod

MANT = Mantissa; EXP= Exponent.

GsCfgCW, EXP_GsCfgCW

GsCfgMod EXP_GsCfgModMANT_GsCfgMod(Ω)

,

MANT_GsCfgCW, R_S(ref)

GsCfgCW,

GsCfgMod

(decimal)

EXP_GsCfgCW

EXP_GsCfgMod

(decimal)

,

MANT_GsCfgCW

MANT_GsCfgMod(Ω)

(decimal)

,

R_S(ref)

(decimal)

0

16

32

48

1

0

1

2

3

0

1

0

2

1

0

1

0

3

2

1

0

1

0

1

2

3

1

2

4

5

3

6

7

1

2

4

8

9

5

-

24

25

37

26

27

51

38

28

29

39

30

52

31

40

41

53

42

43

54

44

45

1

2

1

3

2

1

2

1

3

1

2

3

2

3

2

8

9

0.0652

-

0.0580

0.0541

0.0522

0.0474

0.0467

0.0450

0.0435

0.0401

0.0386

0.0373

0.0350

0.0348

0.0338

0.0300

0.0280

0.0270

0.0246

0.0234

0.0225

0.0208

-

5

-

10

11

3

1.0000

0.5217

0.5000

0.3333

0.2703

0.2609

0.2500

0.2000

0.1739

0.1667

0.1429

0.1402

0.1351

0.1304

0.1250

0.1111

0.1043

17

2

6

3

12

13

7

33

18

4

14

4

5

19

6

15

8

7

9

49

34

20

8

5

10

11

6

9

12

13

21

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Table 22. TX1 and TX2 source resistance of n-channel driver transistor against GsCfgCW or GsCfgMod …continued

MANT = Mantissa; EXP= Exponent.

GsCfgCW, EXP_GsCfgCW

GsCfgMod EXP_GsCfgModMANT_GsCfgMod(Ω)

,

MANT_GsCfgCW, R_S(ref)

GsCfgCW,

GsCfgMod

(decimal)

EXP_GsCfgCW

EXP_GsCfgMod

(decimal)

,

MANT_GsCfgCW

MANT_GsCfgMod(Ω)

(decimal)

,

R_S(ref)

(decimal)

10

11

35

22

12

13

23

14

50

36

15

0

2

1

0

1

0

3

2

0

10

11

3

0.1000

0.0909

0.0901

0.0870

0.0833

0.0769

0.0745

0.0714

0.0701

0.0676

0.0667

55

46

47

56

57

58

59

60

61

62

63

3

2

3

7

0.0200

14

15

8

0.0193

0.0180

0.0175

0.0156

0.0140

0.0127

0.0117

0.0108

0.0100

0.0093

6

12

13

7

9

10

11

12

13

14

15

14

2

4

15

9.9.3.2 Calculating the relative source resistance

The reference source resistance R_S(ref)can be calculated using Equation 6.

1

R_S(ref)

=

(6)

--------------------------------------------------------------------------------

EXP

GsCfgCW

77

⎛

⎞

-----

MANT_GsCfgCW

•

⎝

⎠

40

The reference source resistance (R_S(ref)) during the modulation phase can be calculated

using ModConductance register’s GsCfgMod[5:0].

9.9.3.3 Calculating the effective source resistance

Wiring resistance (R_S(wire)): Wiring and bonding add a constant offset to the driver

resistance that is relevant when pins TX1 and TX2 are switched to low-impedance. The

additional resistance for pin TX1 (R_S(wire)TX1) can be set approximately as shown in

Equation 7.

R_S(wire)TX1≈ 500 mΩ

(7)

Effective resistance (R_Sx): The source resistances of the driver transistors (RsMaxP

byte) read from the Product Information Field (see Section 9.2.1 on page 11) are

measured during the production test with CwConductance register’s

GsCfgCW[5:0] = 01h.

To calculate the driver resistance for a specific value set in GsCfgMod[5:0], use

Equation 8.

R_Sx= (R_S(ref)maxP– R_S(wire)TX1) • R_S(rel)+ R_S(wire)TX1

(8)

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9.9.4 Pulse width

The envelope carries the data signal information that is transmitted to the card. It is an

encoded data signal based on the Miller code. In addition, each pause of the Miller

encoded signal is again encoded as a pulse of a fixed width. The width of the pulse is

adjusted using the ModWidth register. The pulse width (t_w) is calculated using Equation 9

where the frequency constant (f_clk) = 13.56 MHz.

ModWidth + 1

------------------------------------

t_w= 2

(9)

f_clk

9.10 Receiver circuit

The MFRC500 uses an integrated quadrature demodulation circuit enabling it to extract

the ISO/IEC 14443 A compliant subcarrier from the 13.56 MHz ASK modulated signal

applied to pin RX.

The quadrature demodulator uses two different clocks (Q-clock and I-clock) with a

phase-shift of 90° between them. Both resulting subcarrier signals are amplified, filtered

and forwarded to the correlation circuitry. The correlation results are evaluated, digitized

and then passed to the digital circuitry. Various adjustments can be made to obtain

optimum performance for all processing units.

9.10.1 Receiver circuit block diagram

Figure 10 shows the block diagram of the receiver circuit. The receiving process can be

broken down in to several steps. Quadrature demodulation of the 13.56 MHz carrier signal

is performed. To achieve the optimum performance, automatic Q-clock calibration is

recommended (see Section 9.10.2.1 on page 31).

The demodulated signal is amplified by an adjustable amplifier. A correlation circuit

calculates the degree of similarity between the expected and the received signal. The

BitPhase register enables correlation interval position alignment with the received signal’s

bit grid. In the evaluation and digitizer circuitry, the valid bits are detected and the digital

results are sent to the FIFO buffer. Several tuning steps are possible for this circuit.

ClkQ180Deg

ClkQDelay[4:0]

ClkQCalib

I TO Q

CONVERSION

Gain[1:0]

CollLevel[3:0] RcvClkSell

MinLevel[3:0] RxWait[7:0]

BitPhase[7:0]

clock

I-clock

Q-clock

s_valid

EVALUATION

AND

DIGITIZER

CIRCUITRY

s_data

s_coll

CORRELATION

CIRCUITRY

13.56 MHz

DEMODULATOR

RX

s_clock

VRxFollQ

VRxAmpQ

VRxAmpI

VCorrDI

VCorrDQ

VCorrNQ

VEvalR

VRxFollI

VCorrNI

VEvalL

to

TestAnaOutSel

001aak615

Fig 10. Receiver circuit block diagram

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The signal can be observed on its way through the receiver as shown in Figure 10. One

signal at a time can be routed to pin AUX using the TestAnaSelect register as described in

Section 15.2.2 on page 96.

9.10.2 Receiver operation

In general, the default settings programmed in the StartUp initialization file are suitable for

use with the MFRC500 to MIFARE card data communication. However, in some

environments specific user settings will achieve better performance.

9.10.2.1 Automatic Q-clock calibration

The quadrature demodulation concept of the receiver generates a phase signal (I-clock)

and a 90° phase-shifted quadrature signal (Q-clock). To achieve the optimum

demodulator performance, the Q-clock and the I-clock must be phase-shifted by 90°. After

the reset phase, a calibration procedure is automatically performed.

Automatic calibration can be set-up to execute at the end of each Transceive command if

bit ClkQCalib = logic 0. Setting bit ClkQCalib = logic 1 disables all automatic calibrations

except after the reset sequence. Automatic calibration can also be triggered by the

software when bit ClkQCalib has a logic 0 to logic 1 transition.

calibration impulse

a rising edge initiates

from reset sequence

Q-clock calibration

calibration impulse

from end of

Transceive command

ClkQCalib bit

001aak616

Fig 11. Automatic Q-clock calibration

Remark: The duration of the automatic Q-clock calibration is 65 oscillator periods or

approximately 4.8 μs.

The ClockQControl register’s ClkQDelay[4:0] value is proportional to the phase-shift

between the Q-clock and the I-clock. The ClkQ180Deg status flag bit is set when the

phase-shift between the Q-clock and the I-clock is greater than 180°.

Remark:

• The StartUp configuration file enables automatic Q-clock calibration after a reset

• If bit ClkQCalib = logic 1, automatic calibration is not performed. Leaving this bit set to

logic 1 can be used to permanently disable automatic calibration.

• It is possible to write data to the ClkQDelay[4:0] bits using the microprocessor. The

aim could be to disable automatic calibration and set the delay using the software.

Configuring the delay value using the software requires bit ClkQCalib to have been

previously set to logic 1 and a time interval of at least 4.8 μs has elapsed. Each delay

value must be written with bit ClkQCalib set to logic 1. If bit ClkQCalib is logic 0, the

configured delay value is overwritten by the next automatic calibration interval.

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9.10.2.2 Amplifier

The demodulated signal must be amplified by the variable amplifier to achieve the best

performance. The gain of the amplifiers can be adjusted using the RxControl1 register

Gain[1:0] bits; see Table 23.

Table 23. Gain factors for the internal amplifier

See Table 78 “RxControl1 register bit descriptions” on page 55 for additional information.

Register setting

Gain factor (dB)

(simulation results)

00

01

10

11

20

24

31

35

9.10.2.3 Correlation circuitry

The correlation circuitry calculates the degree of matching between the received and an

expected signal. The output is a measure of the amplitude of the expected signal in the

received signal. This is done for both, the Q and I-channels. The correlator provides two

outputs for each of the two input channels, resulting in a total of four output signals.

The correlation circuitry needs the phase information for the incoming card signal for

optimum performance. This information is defined for the microprocessor using the

BitPhase register. This value defines the phase relationship between the transmitter and

receiver clock in multiples of the BitPhase time (t_BitPhase) = 1 / 13.56 MHz.

9.10.2.4 Evaluation and digitizer circuitry

The correlation results are evaluated for each bit-half of the Manchester encoded signal.

The evaluation and digitizer circuit decides from the signal strengths of both bit-halves, if

the current bit is valid

• If the bit is valid, its value is identified

• If the bit is not valid, it is checked to identify if it contains a bit-collision

Select the following levels for optimal using RxThreshold register bits:

• MinLevel[3:0]: defines the minimum signal strength of the stronger bit-halve’s signal

which is considered valid.

• CollLevel[3:0]: defines the minimum signal strength relative to the amplitude of the

stronger half-bit that has to be exceeded by the weaker half-bit of the Manchester

encoded signal to generate a bit-collision. If the signal’s strength is below this value,

logic 1 and logic 0 can be determined unequivocally.

After data transmission, the card is not allowed to send its response before a preset time

period which is called the frame guard time in the ISO/IEC 14443 standard. The length of

this time period is set using the RxWait register’s RxWait[7:0] bits. The RxWait register

defines when the receiver is switched on after data transmission to the card in multiples of

one bit duration.

If bit RcvClkSelI is set to logic 1, the I-clock is used to clock the correlator and evaluation

circuits. If bit RcvClkSelI is set to logic 0, the Q-clock is used.

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Remark: It is recommended to use the Q-clock.

9.11 Serial signal switch

The MFRC500 comprises two main blocks:

• digital circuitry: comprising the state machines, encoder and decoder logic etc.

• analog circuitry: comprising the modulator, antenna drivers, receiver and

amplification circuitry

The interface between these two blocks can be configured so that the interface signals

are routed to pins MFIN and MFOUT. This makes it possible to connect the analog part of

one MFRC500 to the digital part of another device.

9.11.1 Serial signal switch block diagram

Figure 12 shows the serial signal switches. Three different switches are implemented in

the serial signal switch enabling the MFRC500 to be used in different configurations.

The serial signal switch can also be used to check the transmitted and received data

during the design-in phase or for test purposes. Section 15.2.1 on page 94 describes the

analog test signals and measurements at the serial signal switch.

Remark: The SLR400 uses pin name SIGOUT for pin MFOUT. The MFRC500

functionality includes the test modes for the SLRC400 using pin MFOUT.

0

1

0

1

2

3

MILLER CODER

1 OUT OF 256

NRZ OR

TX1

TX2

envelope

MFIN

MODULATOR

DRIVER

serial data out

1 OUT OF 4

2

(part of)

analog circuitry

(part of)

serial data processing

Modulator

Source[1:0]

0

1

2

3

0

internal

Manchester out

SUBCARRIER

DEMODULATOR

CARRIER

DEMODULATOR

RX

MANCHESTER

DECODER

Manchester with subcarrier

Manchester

serial data in

2

SUBCARRIER

DEMODULATOR

Decoder

Source[1:0]

3

SERIAL SIGNAL SWITCH

MFOUTSelect[2:0]

digital test signal

signal to MFOUT

0

1

MFIN

MFOUT

001aak617

Fig 12. Serial signal switch block diagram

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Section 9.11.2, Section 9.11.2.1 and Section 9.11.2.2 describe the relevant registers and

settings used to configure and control the serial signal switch.

9.11.2 Serial signal switch registers

The RxControl2 register DecoderSource[1:0] bits define the input signal for the internal

Manchester decoder and are described in Table 24.

Table 24. DecoderSource[1:0] values

See Table 88 on page 57 for additional information.

Number DecoderSource Input signal to decoder

[1:0]

0

1

2

00

01

10

constant 0

output of the analog part. This is the default configuration

direct connection to pin MFIN; expects an 847.5 kHz subcarrier

signal modulated by a Manchester encoded signal

3

11

direct connection to pin MFIN; expects a Manchester encoded

signal

The TxControl register ModulatorSource[1:0] bits define the signal used to modulate the

transmitted 13.56 MHz energy carrier. The modulated signal drives pins TX1 and TX2.

Table 25. ModulatorSource[1:0] values

See Table 88 on page 57 for additional information.

Number ModulatorSource Input signal to modulator

[1:0]

0

1

2

00

01

10

constant 0 (energy carrier off on pins TX1 and TX2)

constant 1 (continuous energy carrier on pins TX1 and TX2)

modulation signal (envelope) from the internal encoder. This is the

default configuration.

3

11

direct connection to MFIN; expects a Miller pulse coded signal

The MFOUTSelect register MFOUTSelect[2:0] bits select the output signal which is to be

routed to pin MFOUT.

Table 26. MFOUTSelect[2:0] values

See Table 102 on page 60 for additional information.

Number MFOUTSelect Signal routed to pin MFOUT

[2:0]

0

1

2

3

000

001

010

011

constant LOW

constant HIGH

modulation signal (envelope) from the internal encoder

serial data stream to be transmitted; the same as for

MFOUTSelect[2:0] = 010 but not encoded by the selected pulse

encoder

4

5

100

101

output signal of the receiver circuit; card modulation signal

regenerated and delayed

output signal of the subcarrier demodulator; Manchester coded card

signal

6

7

110

111

reserved

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Remark: To use the MFOUTSelect[2:0] bits, the TestDigiSelect register SignalToMFOUT

bit must be logic 0.

9.11.2.1 Active antenna concept

The MFRC500 analog and digital circuitry is accessed using pins MFIN and MFOUT.

Table 27 lists the required settings.

Table 27. Register settings to enable use of the analog circuitry

Register

Analog circuitry settings

Number^[1]Signal

MFRC500 pin

ModulatorSource

MFOUTSelect

3

4

X

Miller pulse encoded

MFIN

MFOUT

-

Manchester encoded with subcarrier

-

DecoderSource

Digital circuitry settings

ModulatorSource

MFOUTSelect

X

2

-

Miller pulse encoded

MFOUT

MFIN

DecoderSource

Manchester encoded with subcarrier

[1] The number column refers to the value in the number column of Table 24, Table 25 and Table 26.

Two MFRC500 devices configured as described in Table 27 can be connected to each

other using pins MFOUT and MFIN.

9.11.2.2 Driving both RF parts

It is possible to connect both passive and active antennas to a single IC. The passive

antenna pins TX1, TX2 and RX are connected using the appropriate filter and matching

circuit. At the same time an active antenna is connected to pins MFOUT and MFIN. In this

configuration, two RF parts can be driven, one after another, by one microprocessor.

9.12 MIFARE authentication and Crypto1

The security algorithm used in the MIFARE products is called Crypto1. It is based on a

proprietary stream cipher with a 48-bit key length. To access data on MIFARE cards,

knowledge of the key format is needed. The correct key must be available in the

MFRC500 to enable successful card authentication and access to the card’s data stored

in the EEPROM.

After a card is selected as defined in ISO/IEC 14443 A standard, the user can continue

with the MIFARE protocol. It is mandatory that the card authentication is performed.

Crypto1 authentication is a 3-pass authentication which is automatically performed when

the Authent1 and Authent2 commands are executed (see Section 11.6.3 on page 82 and

Section 11.6.4 on page 82).

During the card authentication procedure, the security algorithm is initialized. After a

successful authentication, communication with the MIFARE card is encrypted.

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9.12.1 Crypto1 key handling

On execution of the authentication command, the MFRC500 reads the key from the key

buffer. The key is always read from the key buffer and ensures Crypto1 authentication

commands do not require addressing of a key. The user must ensure the correct key is

prepared in the key buffer before triggering card authentication.

The key buffer can be loaded from:

• the EEPROM using the LoadKeyE2 command (see Section 11.6.1 on page 81)

• the microprocessor’s FIFO buffer using the LoadKey command (see Section 11.6.2

on page 81). This is shown in Figure 13.

WriteE2

EEPROM

KEYS

from the microcontroller

FIFO BUFFER

LoadKey

LoadKeyE2

KEY BUFFER

during

Authent1

serial data stream in

(plain)

serial data stream out

CRYPTO1

MODULE

(encrypted)

001aak624

Fig 13. Crypto1 key handling block diagram

9.12.2 Authentication procedure

The Crypto1 security algorithm enables authentication of MIFARE cards. To obtain valid

authentication, the correct key has to be available in the key buffer of the MFRC500. This

can be ensured as follows:

1. Load the internal key buffer by using the LoadKeyE2 (see Section 11.6.1 on page 81)

or the LoadKey (see Section 11.6.2 on page 81) commands.

2. Start the Authent1 command (see Section 11.6.3 on page 82). When finished, check

the error flags to obtain the command execution status.

3. Start the Authent2 command (see Section 11.6.4 on page 82). When finished, check

the error flags and bit Crypto1On to obtain the command execution status.

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10. MFRC500 registers

10.1 Register addressing modes

Three methods can be used to operate the MFRC500:

• initiating functions and controlling data by executing commands

• configuring the functional operation using a set of configuration bits

• monitoring the state of the MFRC500 by reading status flags

The commands, configuration bits and flags are accessed using the microprocessor

interface. The MFRC500 can internally address 64 registers using six address lines.

10.1.1 Page registers

The MFRC500 register set is segmented into eight pages contain eight registers each. A

Page register can always be addressed, irrespective of which page is currently selected.

10.1.2 Dedicated address bus

When using the MFRC500 with the dedicated address bus, the microprocessor defines

three address lines using address pins A0, A1 and A2. This enables addressing within a

page. To switch between registers in different pages a paging mechanism needs to be

used.

Table 28 shows how the register address is assembled.

Table 28. Dedicated address bus: assembling the register address

Register bit: UsePageSelect

Register address

PageSelect2 PageSelect1

1

PageSelect0

A2 A1 A0

10.1.3 Multiplexed address bus

The microprocessor may define all six address lines at once using the MFRC500 with a

multiplexed address bus. In this case either the paging mechanism or linear addressing

can be used.

Table 29 shows how the register address is assembled.

Table 29. Multiplexed address bus: assembling the register address

Multiplexed

address bus

type

UsePage

Select

Register address

Paging mode

1

0

PageSelect2 PageSelect1 PageSelect0 AD2 AD1 AD0

Linear

AD5

AD4

AD3

AD2 AD1 AD0

addressing

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10.2 Register bit behavior

Bits and flags for different registers behave differently, depending on their functions. In

principle, bits with same behavior are grouped in common registers. Table 30 describes

the function of the Access column in the register tables.

Table 30. Behavior and designation of register bits

Abbreviation Behavior

R/W read and write

Description

These bits can be read and written by the microprocessor.

Since they are only used for control, their content is not

influenced by internal state machines.

Example: TimerReload register may be read and written by

the microprocessor. It will also be read by internal state

machines but never changed by them.

D

dynamic

These bits can be read and written by the microprocessor.

Nevertheless, they may also be written automatically by

internal state machines.

Example: the Command register changes its value

automatically after the execution of the command.

R

read only

write only

These registers hold flags which have a value determined by

internal states only.

Example: the ErrorFlag register cannot be written externally

but shows internal states.

W

These registers are used for control only. They may be written

by the microprocessor but cannot be read. Reading these

registers returns an undefined value.

Example: The TestAnaSelect register is used to determine the

signal on pin AUX however, it is not possible to read its

content.

0, 1 or x

generic value

Where applicable, the values 0 and 1 indicate the expected

logic value for a given bit. Where X is used, any logic value can

be entered

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10.3 Register overview

Table 31. MFRC500 register overview

Sub

Register name

Function

Refer to

address

(Hex)

Page 0: Command and status

00h

01h

02h

03h

04h

05h

06h

07h

Page

selects the page register

Table 33 on page 43

Table 35 on page 44

Command

FIFOData

starts and stops command execution

input and output of 64-byte FIFO buffer

receiver and transmitter and FIFO buffer status flags

number of bytes buffered in the FIFO buffer

secondary status flags

Table 37 on page 44

Table 39 on page 45

Table 41 on page 46

Table 43 on page 46

Table 45 on page 47

Table 47 on page 47

PrimaryStatus

FIFOLength

SecondaryStatus

InterruptEn

InterruptRq

enable and disable interrupt request control bits

interrupt request flags

Page 1: Control and status

08h

09h

0Ah

0Bh

0Ch

0Dh

0Eh

0Fh

Page

selects the page register

Table 33 on page 43

Table 49 on page 48

Table 51 on page 49

Control

control flags for timer unit, power saving etc

show the error status of the last command executed

ErrorFlag

CollPos

bit position of the first bit-collision detected on the RF interface Table 53 on page 50

TimerValue

CRCResultLSB

CRCResultMSB

BitFraming

value of the timer

Table 55 on page 50

Table 57 on page 50

Table 59 on page 51

Table 61 on page 51

LSB of the CRC coprocessor register

MSB of the CRC coprocessor register

adjustments for bit oriented frames

Page 2: Transmitter and coder control

10h

11h

12h

13h

14h

15h

16h

17h

Page

selects the page register

Table 33 on page 43

Table 63 on page 52

TxControl

CwConductance

PreSet13

PreSet14

ModWidth

PreSet16

PreSet17

controls the operation of the antenna driver pins TX1 and TX2

selects the conductance of the antenna driver pins TX1 and TX2 Table 65 on page 53

do not change these values

selects the modulation pulse width

do not change these values

Table 67 on page 53

Table 69 on page 53

Table 71 on page 54

Table 73 on page 54

Table 75 on page 54

Page 3: Receiver and decoder control

18

Page

selects the page register

Table 33 on page 43

Table 77 on page 55

Table 79 on page 55

Table 81 on page 56

Table 83 on page 56

Table 85 on page 56

Table 87 on page 57

Table 89 on page 57

19

RxControl1

DecoderControl

BitPhase

controls receiver behavior

1A

1B

1C

1D

1Eh

1Fh

controls decoder behavior

selects the bit-phase between transmitter and receiver clock

selects thresholds for the bit decoder

do not change these values

RxThreshold

PreSet1D

RxControl2

ClockQControl

controls decoder and defines the receiver input source

clock control for the 90° phase-shifted Q-channel clock

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Table 31. MFRC500 register overview …continued

Sub

Register name

Function

Refer to

address

(Hex)

Page 4: RF Timing and channel redundancy

20h

21h

22h

Page

selects the page register

Table 33 on page 43

RxWait

selects the interval after transmission before the receiver starts Table 91 on page 58

ChannelRedundancy selects the method and mode used to check data integrity on

the RF channel

Table 93 on page 58

23h

24h

25h

26h

CRCPresetLSB

CRCPresetMSB

PreSet25

preset LSB value for the CRC register

preset MSB value for the CRC register

do not change these values

Table 95 on page 59

Table 97 on page 59

Table 99 on page 59

MFOUTSelect

selects internal signal applied to pin MFOUT, includes the MSB Table 101 on page 60

of value TimeSlotPeriod; see Table 101 on page 60

27h

PreSet27

do not change these values

Table 103 on page 60

Page 5: FIFO, timer and IRQ pin configuration

28h

29h

2Ah

2Bh

2Ch

2Dh

2Eh

2Fh

Page

selects the page register

Table 33 on page 43

Table 41 on page 46

Table 107 on page 61

Table 109 on page 62

Table 111 on page 62

Table 113 on page 63

Table 115 on page 63

Table 116 on page 63

FIFOLevel

TimerClock

TimerControl

TimerReload

IRQPinConfig

PreSet2E

defines the FIFO buffer overflow and underflow warning levels

selects the timer clock divider

selects the timer start and stop conditions

defines the timer preset value

configures pin IRQ output stage

do not change these values

PreSet2F

do not change these values

Page 6: reserved registers

30h

31h

32h

33h

34h

35h

36h

37h

Page

selects the page register

reserved

Table 33 on page 43

Table 117 on page 63

reserved

Page 7: Test control

38h

39h

3Ah

3Bh

3Ch

3Dh

3Eh

3Fh

Page

selects the page register

reserved

Table 33 on page 43

Table 118 on page 64

Table 119 on page 64

Table 121 on page 65

Table 122 on page 65

Table 123 on page 65

Table 125 on page 66

reserved

TestAnaSelect

reserved

selects analog test mode

reserved

TestDigiSelect

reserved

selects digital test mode

reserved

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10.4 MFRC500 register flags overview

Table 32. MFRC500 register flags overview

Flag(s)

Register

Bit

Address

AccessErr

ErrorFlag

5

0Ah

BitPhase[7:0]

ClkQ180Deg

ClkQCalib

BitPhase

7 to 0 1Bh

ClockQControl

ErrorFlag

7

6

1Fh

ClkQDelay[4:0]

CollErr

4 to 0 1Fh

0Ah

0

CollLevel[3:0]

CollPos[7:0]

Command[5:0]

CRC3309

RxThreshold

CollPos

3 to 0 1Ch

7 to 0 0Bh

5 to 0 01h

Command

ChannelRedundancy

ErrorFlag

5

4

3

22h

0Ah

CRC8

CRCErr

CRCPresetLSB[7:0]

CRCPresetMSB[7:0]

CRCReady

CRCResultMSB[7:0]

CRCResultLSB[7:0]

Crypto1On

DecoderSource[1:0]

E2Ready

CRCPresetLSB

CRCPresetMSB

SecondaryStatus

CRCResultMSB

CRCResultLSB

Control

7 to 0 23h

7 to 0 24h

5

05h

7 to 0 0Eh

7 to 0 0Dh

3

09h

RxControl2

1 to 0 1Eh

SecondaryStatus

PrimaryStatus

FIFOData

6

2

05h

03h

Err

FIFOData[7:0]

FIFOLength[6:0]

FIFOOvfl

7 to 0 02h

6 to 0 04h

FIFOLength

ErrorFlag

4

0

2

0Ah

09h

0Ah

FlushFIFO

FramingErr

Gain[1:0]

Control

ErrorFlag

RxControl1

1 to 0 19h

5 to 0 12h

GsCfgCW[5:0]

HiAlert

CwConductance

PrimaryStatus

InterruptEn

1

2

7

3

1

0

6

0

03h

06h

07h

06h

07h

01h

03h

2Dh

0Ah

03h

HiAlertIEn

HiAlertIRq

InterruptRq

IdleIEn

InterruptEn

IdleIRq

InterruptRq

IFDetectBusy

IRq

Command

PrimaryStatus

IRQPinConfig

ErrorFlag

IRQInv

IRQPushPull

KeyErr

LoAlert

PrimaryStatus

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Table 32. MFRC500 register flags overview …continued

Flag(s)

Register

Bit

0

Address

06h

LoAlertIEn

InterruptEn

InterruptRq

MFOUTSelect

RxThreshold

PrimaryStatus

TxControl

LoAlertIRq

0

07h

MFOUTSelect[2:0]

MinLevel[3:0]

2 to 0 26h

7 to 4 1Ch

6 to 4 03h

6 to 5 11h

7 to 0 15h

ModemState[2:0]

ModulatorSource[1:0]

ModWidth[7:0]

PageSelect[2:0]

ModWidth

Page

2 to 0 00h, 08h, 10h, 18h, 20h, 28h, 30h

and 38h

ParityEn

ChannelRedundancy

ErrorFlag

0

1

4

7

22h

0Ah

22h

09h

1Eh

ParityErr

ParityOdd

ChannelRedundancy

Control

PowerDown

RcvClkSelI

RxAlign[2:0]

RxAutoPD

RxControl2

BitFraming

6 to 4 0Fh

RxControl2

6

3

1Eh

22h

06h

07h

RxCRCEn

ChannelRedundancy

InterruptEn

RxIEn

RxIRq

InterruptRq

RxLastBits[2:0]

RxMultiple

SecondaryStatus

DecoderControl

RxWait

2 to 0 05h

1Ah

7 to 0 21h

6

RxWait[7:0]

SetIEn

InterruptEn

7

5

06h

07h

3Dh

09h

2Ah

SetIRq

InterruptRq

SignalToMFOUT

StandBy

TestDigiSelect

Control

TAutoRestart

TestAnaOutSel[4:0]

TestDigiSignalSel[6:0]

TimerIEn

TimerClock

TestAnaSelect

TestDigiSelect

InterruptEn

3 to 0 3Ah

6 to 0 3Dh

5

06h

07h

TimerIRq

InterruptRq

TimerValue[7:0]

TPreScaler[4:0]

TReloadValue[7:0]

TRunning

TimerValue

7 to 0 0Ch

4 to 0 2Ah

7 to 0 2Ch

TimerClock

TimerReload

SecondaryStatus

TimerControl

Control

7

0

1

2

3

2

05h

2Bh

09h

2Bh

09h

TStartTxBegin

TStartTxEnd

TStartNow

TStopRxBegin

TStopRxEnd

TStopNow

TimerControl

Control

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Table 32. MFRC500 register flags overview …continued

Flag(s)

Register

Bit

0

Address

11h

TX1RFEn

TX2Cw

TxControl

3

11h

TX2Inv

TxControl

3

11h

TX2RFEn

TxCRCEn

TxIEn

TxControl

1

11h

ChannelRedundancy

InterruptEn

InterruptRq

BitFraming

Page

2

22h

4

06h

TxIRq

4

07h

TxLastBits[2:0]

UsePageSelect

2 to 0 0Fh

00h, 08h, 10h, 18h, 20h, 28h, 30h

and 38h

5 to 0 29h

1Ah

7

WaterLevel[5:0]

ZeroAfterColl

FIFOLevel

DecoderControl

5

10.5 Register descriptions

10.5.1 Page 0: Command and status

10.5.1.1 Page register

Selects the page register.

Table 33. Page register (address: 00h, 08h, 10h, 18h, 20h, 28h, 30h, 38h)

reset value: 1000 0000b, 80h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

UsePageSelect

R/W

0000

R/W

PageSelect[2:0]

R/W

Table 34. Page register bit descriptions

Bit

Symbol

Value Description

7

UsePageSelect 1

the value of PageSelect[2:0] is used as the register address

A5, A4, and A3. The LSBs of the register address are

defined using the address pins or the internal address latch,

respectively.

0

the complete content of the internal address latch defines

the register address. The address pins are used as

described in Table 5 on page 8.

6 to 3

2 to 0

0000

-

reserved

PageSelect[2:0] -

when UsePageSelect = logic 1, the value of PageSelect is

used to specify the register page (A5, A4 and A3 of the

register address)

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10.5.1.2 Command register

Starts and stops the command execution.

Table 35. Command register (address: 01h) reset value: x000 0000b, x0h bit allocation

Bit

7

IFDetectBusy

R

6

0

5

4

3

2

1

0

Symbol

Access

Command[5:0]

D

R

Table 36. Command register bit descriptions

Bit

Symbol

Value Description

7

IFDetectBusy

shows the status of interface detection logic

interface detection finished successfully

interface detection ongoing

reserved

0

1

-

6

0

5 to 0

Command[5:0]

-

activates a command based on the Command code.

Reading this register shows which command is being

executed.

10.5.1.3 FIFOData register

Input and output of the 64 byte FIFO buffer.

Table 37. FIFOData register (address: 02h) reset value: xxxx xxxxb, xxh bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

FIFOData[7:0]

D

Table 38. FIFOData register bit descriptions

Bit

Symbol

Description

7 to 0

FIFOData[7:0] data input and output port for the internal 64-byte FIFO buffer. The FIFO

buffer acts as a parallel in to parallel out converter for all data streams.

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10.5.1.4 PrimaryStatus register

Bits relating to receiver, transmitter and FIFO buffer status flags.

Table 39. PrimaryStatus register (address: 03h) reset value: 0000 0101b, 05h bit allocation

Bit

7

0

6

5

4

3

IRq

R

2

Err

R

1

HiAlert

R

0

LoAlert

R

Symbol

Access

ModemState[2:0]

R

Table 40. PrimaryStatus register bit descriptions

Bit

Symbol

Value Status

Description

7

0

-

reserved

6 to 4 ModemState[2:0]

shows the state of the transmitter and receiver

state machines:

000

Idle

neither the transmitter or receiver are operating;

neither of them are started or have input data

001

010

TxSOF

TxData

transmit start of frame pattern

transmit data from the FIFO buffer (or

redundancy CRC check bits)

011

100

TxEOF

transmit End Of Frame (EOF) pattern

GoToRx1

GoToRx2

PrepareRx

intermediate state 1; receiver starts

intermediate state 2; receiver finishes

101

110

waiting until the RxWait register time period

expires

AwaitingRx

Receiving

receiver activated; waiting for an input signal on

pin RX

111

-

receiving data

3

IRq

shows any interrupt source requesting attention

based on the InterruptEn register flag settings

2

1

Err

1

any error flag in the ErrorFlag register is set

HiAlert

the alert level for the number of bytes in the FIFO

buffer (FIFOLength[6:0]) is:

HiAlert = (64 – FIFOLength) ≤ WaterLevel

otherwise value = logic 0

Example:

FIFOLength = 60, WaterLevel = 4 then

HiAlert = logic 1

FIFOLength = 59, WaterLevel = 4 then

HiAlert = logic 0

0

LoAlert

1

the alert level for number of bytes in the FIFO

buffer (FIFOLength[6:0]) is:

LoAlert = FIFOLength ≤ WaterLevel otherwise

value = logic 0

Example:

FIFOLength = 4, WaterLevel = 4 then

LoAlert = logic 1

FIFOLength = 5, WaterLevel = 4 then

LoAlert = logic 0

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10.5.1.5 FIFOLength register

Number of bytes in the FIFO buffer.

Table 41. FIFOLength register (address: 04h) reset value: 0000 0000b, 00h bit allocation

Bit

7

0

6

5

4

3

2

1

0

Symbol

Access

FIFOLength[6:0]

R

Table 42. FIFOLength bit descriptions

Bit

Symbol

Description

7

0

reserved

6 to 0 FIFOLength[6:0]

gives the number of bytes stored in the FIFO buffer. Writing

increments the FIFOLength register value while reading decrements

the FIFOLength register value

10.5.1.6 SecondaryStatus register

Various secondary status flags.

Table 43. SecondaryStatus register (address: 05h) reset value: 01100 000b, 60h bit

allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

TRunning E2Ready CRCReady

00

R

RxLastBits[2:0]

R

Table 44. SecondaryStatus register bit descriptions

Bit

Symbol

Value Description

7

TRunning

1

the timer unit is running and the counter decrements the

TimerValue register on the next timer clock cycle

0

1

0

1

0

-

the timer unit is not running

EEPROM programming is finished

EEPROM programming is ongoing

CRC calculation is finished

CRC calculation is ongoing

reserved

6

5

E2Ready

CRCReady

4 to 3 00

2 to 0 RxLastBits[2:0]

-

shows the number of valid bits in the last received byte. If zero,

the whole byte is valid

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10.5.1.7 InterruptEn register

Control bits to enable and disable passing of interrupt requests.

Table 45. InterruptEn register (address: 06h) reset value: 0000 0000b, 00h bit allocation

Bit

7

SetIEn

W

6

0

5

4

3

2

1

0

Symbol

Access

TimerIEn

R/W

TxIEn

R/W

RxIEn IdleIEn HiAlertIEn LoAlertIEn

R/W R/W R/W R/W

R/W

Table 46. InterruptEn register bit descriptions

Bit Symbol Value Description

7

SetIEn

1

0

-

indicates that the marked bits in the InterruptEn register are set

clears the marked bits

6

5

4

3

2

1

0

reserved

TimerIEn

TxIEn

-

sends the TimerIRq timer interrupt request to pin IRQ^[1]

sends the TxIRq transmitter interrupt request to pin IRQ^[1]

sends the RxIRq receiver interrupt request to pin IRQ^[1]

sends the IdleIRq idle interrupt request to pin IRQ^[1]

sends the HiAlertIRq high alert interrupt request to pin IRQ^[1]

sends the LoAlertIRq low alert interrupt request to pin IRQ^[1]

-

RxIEn

IdleIEn

HiAlertIEn

-

LoAlertIEn -

[1] This bit can only be set or cleared using bit SetIEn.

10.5.1.8 InterruptRq register

Interrupt request flags.

Table 47. InterruptRq register (address: 07h) reset value: 0000 0000b, 00h bit allocation

Bit

7

SetIRq

W

6

0

5

TimerIRq

D

4

TxIRq

D

3

2

1

0

Symbol

Access

RxIRq IdleIRq HiAlertIRq LoAlertIRq

R/W

D

Table 48. InterruptRq register bit descriptions

Bit Symbol Value Description

7

SetIRq

1

0

-

sets the marked bits in the InterruptRq register

clears the marked bits in the InterruptRq register

reserved

6

5

0

TimerIRq

1

0

1

timer decrements the TimerValue register to zero

timer decrements are still greater than zero

4

TxIRq

TxIRq is set to logic 1 if one of the following events occurs:

Transceive command; all data transmitted

Authent1 and Authent2 commands; all data transmitted

WriteE2 command; all data is programmed

CalcCRC command; all data is processed

0

when not acted on by Transceive, Authent1, Authent2, WriteE2 or

CalcCRC commands

3

RxIRq

1

0

the receiver terminates

reception still ongoing

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Table 48. InterruptRq register bit descriptions …continued

Bit Symbol Value Description

2

IdleIRq

1

command terminates correctly. For example; when the Command

register changes its value from any command to the Idle command.

If an unknown command is started the IdleIRq bit is set.

Microprocessor start-up of the Idle command does not set the

IdleIRq bit.

0

1

0

1

0

IdleIRq = logic 0 in all other instances

PrimaryStatus register HiAlert bit is set^[1]

PrimaryStatus register HiAlert bit is not set

PrimaryStatus register LoAlert bit is set^[1]

PrimaryStatus register LoAlert bit is not set

1

0

HiAlertIRq

LoAlertIRq

[1] PrimaryStatus register Bit HiAlertIRq stores this event and it can only be reset using bit SetIRq.

10.5.2 Page 1: Control and status

10.5.2.1 Page register

Selects the page register; see Section 10.5.1.1 “Page register” on page 43.

10.5.2.2 Control register

Various control flags, for timer, power saving, etc.

Table 49. Control register (address: 09h) reset value: 0000 0000b, 00h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

00

StandBy PowerDown Crypto1On TStopNow TStartNow FlushFIFO

R/W

D

W

Table 50. Control register bit descriptions

Bit Symbol Value Description

7 to 6 00

-

reserved

5

4

3

StandBy

1

activates Standby mode. The current consuming blocks are

switched off but the clock keeps running

PowerDown

Crypto1On

1

0

activates Power-down mode. The current consuming blocks

are switched off including the clock

Crypto1 unit is switched on and all data communication with

the card is encrypted^[1]

Crypto1 unit is switched off. All data communication with the

card is unencrypted (plain)

2

1

0

TStopNow

TStartNow

FlushFIFO

1

immediately stops the timer^[2]

immediately starts the timer^[2]

immediately clears the internal FIFO buffer’s read and write

pointer, the FIFOLength[6:0] bits are set to logic 0 and the

FIFOOvfl flag^[2]

[1] This bit can only be set to logic 1 by successful execution of the Authent2 command

[2] Reading this bit always returns logic 0

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10.5.2.3 ErrorFlag register

Error flags show the error status of the last executed command.

Table 51. ErrorFlag register (address: 0Ah) reset value: 0100 0000b, 40h bit allocation

Bit

7

0

6

5

4

3

2

1

0

Symbol

Access

KeyErr AccessErr FIFOOvfl CRCErr FramingErr ParityErr CollErr

R

Table 52. ErrorFlag register bit descriptions

Bit Symbol Value Description

7

6

0

-

reserved

KeyErr

1

set when the LoadKeyE2 or LoadKey command recognize that the

input data is not encoded based on the key format definition

0

1

0

1

set when the LoadKeyE2 or the LoadKey command starts

set when the access rights to the EEPROM are violated

set when an EEPROM related command starts

5

AccessErr

4

3

FIFOOvfl

CRCErr

set when the microprocessor or MFRC500 internal state machine

(e.g. receiver) tries to write data to the FIFO buffer when it is full

1

0

set when RxCRCEn is set and the CRC fails

automatically set during the PrepareRx state in the receiver start

phase

2

1

0

FramingErr

ParityErr

CollErr

1

0

set when the SOF is incorrect

automatically set during the PrepareRx state in the receiver start

phase

1

0

set when the parity check fails

automatically set during the PrepareRx state in the receiver start

phase

1

0

set when a bit-collision is detected

automatically set during the PrepareRx state in the receiver start

phase

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10.5.2.4 CollPos register

Bit position of the first bit-collision detected on the RF interface.

Table 53. CollPos register (address: 0Bh) reset value: 0000 0000b, 00h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

CollPos[7:0]

R

Table 54. CollPos register bit descriptions

Bit Symbol Description

7 to 0 CollPos[7:0] this register shows the bit position of the first detected collision in a

received frame.

Example:

00h indicates a bit collision in the start bit

01h indicates a bit collision in the 1^stbit

...

08h indicates a bit collision in the 8^thbit

10.5.2.5 TimerValue register

Value of the timer.

Table 55. TimerValue register (address: 0Ch) reset value: xxxx xxxxb, xxh bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

TimerValue[7:0]

R

Table 56. TimerValue register bit descriptions

Bit

Symbol

Description

7 to 0

TimerValue[7:0] this register shows the timer counter value

10.5.2.6 CRCResultLSB register

LSB of the CRC coprocessor register.

Table 57. CRCResultLSB register (address: 0Dh) reset value: xxxx xxxxb, xxh bit

allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

CRCResultLSB[7:0]

R

Table 58. CRCResultLSB register bit descriptions

Bit Symbol Description

7 to 0 CRCResultLSB[7:0] gives the CRC register’s least significant byte value; only valid if

CRCReady = logic 1

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10.5.2.7 CRCResultMSB register

MSB of the CRC coprocessor register.

Table 59. CRCResultMSB register (address: 0Eh) reset value: xxxx xxxxb, xxh bit

allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

CRCResultMSB[7:0]

R

Table 60. CRCResultMSB register bit descriptions

Bit

Symbol

Description

7 to 0

CRCResultMSB[7:0] gives the CRC register’s most significant byte value; only valid if

CRCReady = logic 1.

The register’s value is undefined for 8-bit CRC calculation.

10.5.2.8 BitFraming register

Adjustments for bit oriented frames.

Table 61. BitFraming register (address: 0Fh) reset value: 0000 0000b, 00h bit allocation

Bit

7

0

6

5

RxAlign[2:0]

D

4

3

0

2

1

0

Symbol

Access

TxLastBits[2:0]

D

R/W

Table 62. BitFraming register bit descriptions

Bit

Symbol

Value Description

7

0

-

reserved

6 to 4 RxAlign[2:0]

defines the bit position in the FIFO buffer for the first bit received

and stored. Additional received bits are stored in the next

subsequent bit positions. After reception, RxAlign[2:0] is

automatically cleared. For example:

000

001

the LSB of the received bit is stored in bit position 0 and the

second received bit is stored in bit position 1

the LSB of the received bit is stored in bit position 1, the

second received bit is stored in bit position 2

...

111

the LSB of the received bit is stored in bit position 7, the

second received bit is stored in the next byte in bit position 0

3

0

-

reserved

2 to 0 TxLastBits[2:0]

defines the number of bits of the last byte that shall be

transmitted. 000 indicates that all bits of the last byte will be

transmitted. TxLastBits[2:0] is automatically cleared after

transmission.

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10.5.3 Page 2: Transmitter and control

10.5.3.1 Page register

Selects the page register; see Section 10.5.1.1 “Page register” on page 43.

10.5.3.2 TxControl register

Controls the logical behavior of the antenna pins TX1 and TX2.

Table 63. TxControl register (address: 11h) reset value: 0101 1000b, 58h bit allocation

Bit

7

0

6

5

4

1

3

2

1

0

Symbol

Access

ModulatorSource[1:0]

R/W

TX2Inv TX2Cw TX2RFEn TX1RFEn

R/W R/W R/W R/W

R/W

Table 64. TxControl register bit descriptions

Bit

7

Symbol

Value Description

0

-

this value must not be changed

6 to 5

ModulatorSource[1:0]

selects the source for the modulator input:

modulator input is LOW

00

01

10

11

-

modulator input is HIGH

modulator input is the internal encoder

modulator input is pin MFIN

4

3

1

this value must not be changed

TX2Inv

1

delivers an inverted 13.56 MHz energy carrier output

signal on pin TX2

2

1

0

TX2Cw

1

delivers a continuously unmodulated 13.56 MHz

energy carrier output signal on pin TX2

0

1

enables modulation of the 13.56 MHz energy carrier

TX2RFEn

TX1RFEn

the output signal on pin TX2 is the 13.56 MHz energy

carrier modulated by the transmission data

0

1

TX2 is driven at a constant output level

the output signal on pin TX1 is the 13.56 MHz energy

carrier modulated by the transmission data

0

TX1 is driven at a constant output level

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10.5.3.3 CwConductance register

Selects the conductance of the antenna driver pins TX1 and TX2.

Table 65. CwConductance register (address: 12h) reset value: 0011 1111b, 3Fh bit

allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

00

GsCfgCW[5:0]

R/W

Table 66. CwConductance register bit descriptions

Bit

Symbol

00

Value Description

7 to 6

5 to 0

0

-

these values must not be changed

GsCfgCW[5:0]

defines the conductance register value for the output driver.

This can be used to regulate the output power/current

consumption and operating distance.

See Section 9.9.3.1 for detailed information about GsCfgCW[5:0].

10.5.3.4 PreSet13 register

These bit settings must not be changed.

Table 67. PreSet13 register (address: 13h) reset value: 0011 1111b, 3Fh bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

00

11111

R/W

Table 68. PreSet13 register bit descriptions

Bit

Symbol

00

Value Description

7 to 6

5 to 0

0

-

these values must not be changed

11111

10.5.3.5 PreSet14 register

These bit settings must not be changed.

Table 69. PreSet14 register (address: 14h) reset value: 0001 1001b, 19h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

000

11

00

1

R/W

Table 70. PreSet14 register bit descriptions

Bit

Symbol

Value

Description

7 to 5 000

4 to 3 11

2 to 1 00

0

1

0

1

these values must not be changed

0

1

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10.5.3.6 ModWidth register

Selects the pulse-modulation width.

Table 71. ModWidth register (address: 15h) reset value: 0001 0011b, 13h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

ModWidth[7:0]

R/W

Table 72. ModWidth register bit descriptions

Bit

Symbol

Description

7 to 0

ModWidth[7:0]

defines the width of the modulation pulse based on

t_mod= 2⋅(ModWidth + 1) / f_clk

10.5.3.7 PreSet16 register

These bit settings must not be changed.

Table 73. PreSet16 register (address: 16h) reset value: 0000 0000b, 00h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

00000000

R/W

Table 74. PreSet16 register bit descriptions

Bit Symbol Value Description

these values must not be changed

7 to 0 00000000

0

10.5.3.8 PreSet17 register

These bit settings must not be changed.

Table 75. PreSet17 register (address: 17h) reset value: 0000 0000b, 00h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

00000000

R/W

Table 76. PreSet17 register bit descriptions

Bit Symbol Value Description

7 to 0 00000000 these values must not be changed

0

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10.5.4 Page 3: Receiver and decoder control

10.5.4.1 Page register

Selects the page register; see Section 10.5.1.1 “Page register” on page 43.

10.5.4.2 RxControl1 register

Controls receiver operation.

Table 77. RxControl1 register (address: 19h) reset value: 0111 0011b, 73h bit allocation

Bit

7

0

6

5

4

3

2

1

0

Symbol

Access

111

R/W

00

Gain[1:0]

R/W

Table 78. RxControl1 register bit descriptions

Bit

Symbol

Value Description

7

0

1

0

these values must not be changed

6 to 4 111

3 to 2 00

1 to 0 Gain[1:0]

defines the receiver’s signal voltage gain factor

20 dB gain factor

00

01

10

11

24 dB gain factor

31 dB gain factor

35 dB gain factor

10.5.4.3 DecoderControl register

Controls decoder operation.

Table 79. DecoderControl register (address: 1Ah) reset value: 0000 1000b, 08h bit

allocation

Bit

7

0

6

5

4

0

3

1

2

1

0

Symbol

Access

RxMultiple ZeroAfterColl

R/W R/W

000

R/W

Table 80. DecoderControl register bit descriptions

Bit

7

Symbol

0

Value Description

-

this value must not be changed

6

RxMultiple

0

1

after receiving one frame, the receiver is deactivated

enables reception of more than one frame

5

ZeroAfterColl

any bits received after a bit-collision are masked to zero. This

helps to resolve the anti-collision procedure as defined in

ISO/IEC 14443 A

4

3

0

1

0

1

0

this value must not be changed

these values must not be changed

2 to 0 000

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10.5.4.4 BitPhase register

Selects the bit-phase between transmitter and receiver clock.

Table 81. BitPhase register (address: 1Bh) reset value: 1010 1101b, ADh bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

BitPhase[7:0]

R/W

Table 82. BitPhase register bit descriptions

Bit

Symbol

Description

7 to 0

BitPhase[7:0]

defines the phase relationship between transmitter and receiver clock

Remark: The correct value of this register is essential for proper

operation.

10.5.4.5 RxThreshold register

Selects thresholds for the bit decoder.

Table 83. RxThreshold register (address: 1Ch) reset value: 1111 1111b, FFh bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

MinLevel[3:0]

R/W

CollLevel[3:0]

R/W

Table 84. RxThreshold register bit descriptions

Bit

Symbol

Description

7 to 4

MinLevel[3:0]

the minimum signal strength the decoder will accept. If the signal

strength is below this level, it is not evaluated.

3 to 0

CollLevel[3:0]

the minimum signal strength the decoder input that must be reached

by the weaker half-bit of the Manchester encoded signal to generate

a bit-collision (relative to the amplitude of the stronger half-bit)

10.5.4.6 PreSet1D Register

These bit settings must not be changed.

Table 85. PreSet1D register (address: 1Dh) reset value: 0000 0000b, 00h bit allocation

Bit

7

6

5

4

00000000

R/W

3

2

1

0

Symbol

Access

Table 86. PreSet1D register bit descriptions

Bit Symbol Value Description

7 to 0 00000000 these values must not be changed

0

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10.5.4.7 RxControl2 register

Controls decoder behavior and defines the input source for the receiver.

Table 87. RxControl2 register (address: 1Eh) reset value: 0100 0001b, 41h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

RcvClkSelI RxAutoPD

R/W R/W

0000

R/W

DecoderSource[1:0]

R/W

Table 88. RxControl2 register bit descriptions

Bit

Symbol

Value Description

7

RcvClkSelI

1

0

1

I-clock is used as the receiver clock^[1]

Q-clock is used as the receiver clock^[1]

6

RxAutoPD

receiver circuit is automatically switched on before

receiving and switched off afterwards. This can be used to

reduce current consumption.

0

-

receiver is always activated

these values must not be changed

selects the source for the decoder input

LOW

5 to 2 0000

1 to 0 DecoderSource[1:0]

00

01

10

internal demodulator

a subcarrier modulated Manchester encoded signal on

pin MFIN

11

a baseband Manchester encoded signal on pin MFIN

[1] I-clock and Q-clock are 90° phase-shifted from each other.

10.5.4.8 ClockQControl register

Controls clock generation for the 90° phase-shifted Q-clock.

Table 89. ClockQControl register (address: 1Fh) reset value: 000x xxxxb, xxh bit allocation

Bit

7

6

5

0

4

3

2

1

0

Symbol

Access

ClkQ180Deg ClkQCalib

R/W

ClkQDelay[4:0]

D

R

R/W

Table 90. ClockQControl register bit descriptions

Bit

Symbol

Value Description

7

ClkQ180Deg

1

0

Q-clock is phase-shifted more than 180° compared to the

I-clock

Q-clock is phase-shifted less than 180° compared to the

I-clock

6

ClkQCalib

Q-clock is automatically calibrated after the reset phase and

after data reception from the card

1

-

no calibration is performed automatically

this value must not be changed

5

0

4 to 0

ClkQDelay[4:0]

-

this register shows the number of delay elements used to

generate a 90° phase-shift of the I-clock to obtain the

Q-clock. It can be written directly by the microprocessor or

by the automatic calibration cycle.

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10.5.5 Page 4: RF Timing and channel redundancy

10.5.5.1 Page register

Selects the page register; see Section 10.5.1.1 “Page register” on page 43.

10.5.5.2 RxWait register

Selects the time interval after transmission, before the receiver starts.

Table 91. RxWait register (address: 21h) reset value: 0000 0101b, 06h bit allocation

Bit

7

6

5

4

3

RxWait[7:0]

R/W

2

1

0

Symbol

Access

Table 92. RxWait register bit descriptions

Bit

Symbol

Function

7 to 0

RxWait[7:0]

after data transmission, the activation of the receiver is delayed

for RxWait bit-clock cycles. During this frame guard time any

signal on pin RX is ignored.

10.5.5.3 ChannelRedundancy register

Selects kind and mode of checking the data integrity on the RF channel.

Table 93. ChannelRedundancy register (address: 22h) reset value: 0000 0011b, 03h bit

allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

00

R/W R/W

CRC3309

R/W

CRC8 RxCRCEn TxCRCEn ParityOdd ParityEn

R/W R/W R/W R/W R/W

Table 94. ChannelRedundancy bit descriptions

Bit Symbol Value Function

7 to 6 00

-

this value must not be changed

5

CRC3309

1

CRC calculation is performed using ISO/IEC 3309 and

ISO/IEC 15693

0

1

0

1

CRC calculation is performed using ISO/IEC 14443 A

an 8-bit CRC is calculated

4

3

CRC8

a 16-bit CRC is calculated

RxCRCEn

the last byte(s) of a received frame are interpreted as CRC bytes. If

the CRC is correct, the CRC bytes are not passed to the FIFO. If

the CRC bytes are incorrect, the CRCErr flag is set.

0

1

no CRC is expected

2

TxCRCEn

a CRC is calculated over the transmitted data and the CRC bytes

are appended to the data stream

0

no CRC is transmitted

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Table 94. ChannelRedundancy bit descriptions …continued

Bit

Symbol

Value Function

1

ParityOdd

1

0

1

odd parity is generated or expected^[1]

even parity is generated or expected

0

ParityEn

a parity bit is inserted in the transmitted data stream after each byte

and expected in the received data stream after each byte (MIFARE,

ISO/IEC 14443 A)

0

no parity bit is inserted or expected

[1] With ISO/IEC 14443 A, this bit must be set to logic 1.

10.5.5.4 CRCPresetLSB register

LSB of the preset value for the CRC register.

Table 95. CRCPresetLSB register (address: 23h) reset value: 0101 0011b, 63h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

CRCPresetLSB[7:0]

R/W

Table 96. CRCPresetLSB register bit descriptions

Bit

Symbol

Description

7 to 0

CRCPresetLSB[7:0] defines the start value for CRC calculation. This value is loaded

into the CRC at the beginning of transmission, reception and

the CalcCRC command (if CRC calculation is enabled).

10.5.5.5 CRCPresetMSB register

MSB of the preset value for the CRC register.

Table 97. CRCPresetMSB register (address: 24h) reset value: 0101 0011b, 63h bit

allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

CRCPresetMSB[7:0]

R/W

Table 98. CRCPresetMSB bit descriptions

Bit Symbol Description

7 to 0 CRCPresetMSB[7:0]

defines the starting value for CRC calculation. This value is

loaded into the CRC at the beginning of transmission, reception

and the CalcCRC command (if the CRC calculation is enabled)

Remark: This register is not relevant if CRC8 is set to logic 1.

10.5.5.6 PreSet25 register

These values must not be changed.

Table 99. PreSet25 register (address: 25h) reset value: 0000 0000b, 00h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

00000000

R/W

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Table 100. PreSet25 register bit descriptions

Bit

Symbol

Value Description

0 these values must not be changed

7 to 0

00000000

10.5.5.7 MFOUTSelect register

Selects the internal signal applied to pin MFOUT.

Table 101. MFOUTSelect register (address: 26h) reset value: 0000 0000b, 00h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

00000

R/W

MFOUTSelect[2:0]

R/W

Table 102. MFOUTSelect register bit descriptions

Bit

Symbol

Value

Description

7 to 3 00000

0

these values must not be changed

defines which signal is routed to pin MFOUT:

constant LOW

2 to 0 MFOUTSelect[2:0]

000

001

010

constant HIGH

modulation signal (envelope) from the internal

encoder, (Miller coded)

011

100

serial data stream, not Miller encoded

output signal of the energy carrier demodulator (card

modulation signal)^[1]

101

output signal of the subcarrier demodulator

(Manchester encoded card signal)^[1]

110

111

reserved

[1] Only valid for MIFARE and ISO/IEC 14443 A communication at 106 kBd.

10.5.5.8 PreSet27 register

Table 103. PreSet27 (address: 27h) reset value: xxxx xxxxb, xxh bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

xxxxxxxx

W

Table 104. PreSet27 register bit descriptions

Bit

Symbol

Value Description

these values can be logic 1 or logic 0

7 to 0

xxxxxxxx

0

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10.5.6 Page 5: FIFO, timer and IRQ pin configuration

10.5.6.1 Page register

Selects the page register; see Section 10.5.1.1 “Page register” on page 43.

10.5.6.2 FIFOLevel register

Defines the levels for FIFO underflow and overflow warning.

Table 105. FIFOLevel register (address: 29h) reset value: 0000 1000b, 08h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

00

WaterLevel[5:0]

R/W

Table 106. FIFOLevel register bit descriptions

Bit Symbol Description

7 to 6 00 these values must not be changed

5 to 0 WaterLevel[5:0] defines, the warning level of a FIFO buffer overflow or underflow:

HiAlert is set to logic 1 if the remaining FIFO buffer space is equal to,

or less than, WaterLevel[5:0] bits in the FIFO buffer.

LoAlert is set to logic 1 if equal to, or less than, WaterLevel[5:0] bits in

the FIFO buffer.

10.5.6.3 TimerClock register

Selects the divider for the timer clock.

Table 107. TimerClock register (address: 2Ah) reset value: 0000 0111b, 07h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

00

TAutoRestart

RW

TPreScaler[4:0]

RW

Table 108. TimerClock register bit descriptions

Bit Symbol Value Function

7 to 6 00

0

1

these values must not be changed

5

TAutoRestart

the timer automatically restarts its countdown from the

TReloadValue[7:0] instead of counting down to zero

0

-

the timer decrements to zero and register InterruptIRq

TimerIRq bit is set to logic 1

4 to 0 TPreScaler[4:0]

defines the timer clock frequency (f_TimerClock). The

TPreScaler[4:0] can be adjusted from 0 to 21. The following

formula is used to calculate the TimerClock frequency

(f_TimerClock):

f

_TimerClock= 13.56 MHz / 2^TPreScaler[MHz]

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10.5.6.4 TimerControl register

Selects start and stop conditions for the timer.

Table 109. TimerControl register (address: 2Bh) reset value: 0000 0110b, 06h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

0000

R/W

TStopRxEnd TStopRxBegin TStartTxEnd TStartTxBegin

R/W R/W R/W R/W

Table 110. TimerControl register bit descriptions

Bit Symbol Value Description

7 to 4 0000

0

1

0

1

0

1

these values must not be changed

3

2

1

TStopRxEnd

the timer automatically stops when data reception ends

the timer is not influenced by this condition

TStopRxBegin

TStartTxEnd

the timer automatically stops when the first valid bit is received

the timer is not influenced by this condition

the timer automatically starts when data transmission ends. If

the timer is already running, the timer restarts by loading

TReloadValue[7:0] into the timer.

0

1

the timer is not influenced by this condition

0

TStartTxBegin

the timer automatically starts when the first bit is transmitted. If

the timer is already running, the timer restarts by loading

TReloadValue[7:0] into the timer.

0

the timer is not influenced by this condition

10.5.6.5 TimerReload register

Defines the preset value for the timer.

Table 111. TimerReload register (address: 2Ch) reset value: 0000 1010b, 0Ah bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

TReloadValue[7:0]

R/W

Table 112. TimerReload register bit descriptions

Bit Symbol Description

7 to 0 TReloadValue[7:0] on a start event, the timer loads the TReloadValue[7:0] value.

Changing this register only affects the timer on the next start event. If

TReloadValue[7:0] is set to logic 0 the timer cannot start.

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10.5.6.6 IRQPinConfig register

Configures the output stage for pin IRQ.

Table 113. IRQPinConfig register (address: 2Dh) reset value: 0000 0010b, 02h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

000000

R/W

IRQInv IRQPushPull

R/W R/W

Table 114. IRQPinConfig register bit descriptions

Bit

7 to 2

1

Symbol

000000

IRQInv

Value Description

0

1

0

1

0

these values must not be changed

inverts the signal on pin IRQ with respect to bit IRq

the signal on pin IRQ is not inverted and is the same as bit IRq

pin IRQ functions as a standard CMOS output pad

pin IRQ functions as an open-drain output pad

0

IRQPushPull

10.5.6.7 PreSet2E register

Table 115. PreSet2E register (address: 2Eh) reset value: xxxx xxxxb, xxh bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

xxxxxxxx

W

10.5.6.8 PreSet2F register

Table 116. PreSet2F register (address: 2Fh) reset value: xxxx xxxxb, xxh bit allocation

Bit

7

6

5

4

3

2

1

Symbol

Access

xxxxxxxx

W

10.5.7 Page 6: reserved

10.5.7.1 Page register

Selects the page register; see Section 10.5.1.1 “Page register” on page 43.

10.5.7.2 Reserved registers 31h, 32h, 33h, 34h, 35h, 36h and 37h

Table 117. Reserved registers (address: 31h, 32h, 33h, 34h, 35h, 36h, 37h)

reset value: xxxx xxxxb, xxh bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

xxxxxxxx

W

Remark: These registers are reserved for future use.

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10.5.8 Page 7: Test control

10.5.8.1 Page register

Selects the page register; see Section 10.5.1.1 “Page register” on page 43.

10.5.8.2 Reserved register 39h

Table 118. Reserved register (address: 39h) reset value: xxxx xxxxb, xxh bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

xxxxxxxx

W

Remark: This register is reserved for future use.

10.5.8.3 TestAnaSelect register

Selects analog test signals.

Table 119. TestAnaSelect register (address: 3Ah) reset value: 0000 0000b, 00h bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

0000

W

TestAnaOutSel[4:0]

W

Table 120. TestAnaSelect bit descriptions

Bit

Symbol

Value Description

7 to 4

3 to 0

0000

0

these values must not be changed

TestAnaOutSel[4:0]

selects the internal analog signal to be routed to the AUX

pin. See Section 15.2.2 on page 96 for detailed

information. The settings are as follows:

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

VMID

Vbandgap

VRxFollI

VRxFollQ

VRxAmpI

VRxAmpQ

VCorrNI

VCorrNQ

VCorrDI

VCorrDQ

VEvalL

VEvalR

VTemp

reserved

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10.5.8.4 Reserved register 3Bh

Table 121. Reserved register (address: 3Bh) reset value: xxxx xxxxb, xxh bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

xxxxxxxx

W

Remark: This register is reserved for future use.

10.5.8.5 Reserved register 3Ch

Table 122. Reserved register (address: 3Ch) reset value: xxxx xxxxb, xxh bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

xxxxxxxx

W

Remark: This register is reserved for future use.

10.5.8.6 TestDigiSelect register

Selects digital test mode.

Table 123. TestDigiSelect register (address: 3Dh) reset value: xxxx xxxxb, xxh bit allocation

Bit

7

SignalToMFOUT

W

6

5

4

3

2

1

0

Symbol

Access

TestDigiSignalSel[6:0]

W

Table 124. TestDigiSelect register bit descriptions

Bit

Symbol

Value Description

7

SignalToMFOUT

1

overrules the MFOUTSelect[2:0] setting and routes the

digital test signal defined with the TestDigiSignalSel[6:0]

bits to pin MFOUT

0

-

MFOUTSelect[2:0] defines the signal on pin MFOUT

6 to 0 TestDigiSignalSel[6:0]

selects the digital test signal to be routed to pin MFOUT.

Refer to Section 15.2.3 on page 97 for detailed

information. The following lists the signal names for the

TestDigiSignalSel[6:0] addresses:

F4h

E4h

D4h

C4h

B5h

A5h

96h

s_data

s_valid

s_coll

s_clock

rd_sync

wr_sync

int_clock

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10.5.8.7 Reserved registers 3Eh, 3Fh

Table 125. Reserved register (address: 3Eh, 3Fh) reset value: xxxx xxxxb, xxh bit allocation

Bit

7

6

5

4

3

2

1

0

Symbol

Access

xxxxxxxx

W

Remark: This register is reserved for future use.

11. MFRC500 command set

MFRC500 operation is determined by an internal state machine capable of performing a

command set. The commands can be started by writing the command code to the

Command register. Arguments and/or data necessary to process a command are mainly

exchanged using the FIFO buffer.

• Each command needing a data stream (or data byte stream) as an input immediately

processes the data in the FIFO buffer

• Each command that requires arguments only starts processing when it has received

the correct number of arguments from the FIFO buffer

• The FIFO buffer is not automatically cleared at the start of a command. It is, therefore,

possible to write command arguments and/or the data bytes into the FIFO buffer

before starting a command.

• Each command (except the StartUp command) can be interrupted by the

microprocessor writing a new command code to the Command register e.g. the Idle

command.

11.1 MFRC500 command overview

Table 126. MFRC500 commands overview

Command

Value Action

FIFO communication

Arguments and data

sent

Data received

StartUp

3Fh

runs the reset and initialization phase. See

-

Section 11.1.2 on page 68.

Remark: This command can only be activated by

Power-On or Hard resets.

Idle

00h

1Ah

16h

no action; cancels execution of the current command.

See Section 11.1.3 on page 68

-

Transmit

Receive

transmits data from the FIFO buffer to the card. See

Section 11.2.1 on page 69

data stream

-

activates receiver circuitry. Before the receiver starts,

the state machine waits until the time defined in the

RxWait register has elapsed. See Section 11.2.2 on

page 72.

data stream

Remark: This command may be used for test

purposes only, since there is no timing relationship to

the Transmit command.

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Table 126. MFRC500 commands overview …continued

Command

Value Action

FIFO communication

Arguments and data

sent

Data received

Transceive^[1]1Eh

transmits data from FIFO buffer to the card and

automatically activates the receiver after

data stream

transmission. The receiver waits until the time defined

in the RxWait register has elapsed before starting.

See Section 11.2.3 on page 75.

WriteE2

ReadE2

01h

03h

reads data from the FIFO buffer and writes it to the

EEPROM. See Section 11.3.1 on page 77.

start address LSB

start address MSB

data byte stream

start address LSB

start address MSB

number of data bytes

start address LSB

start address MSB

-

reads data from the EEPROM and sends it to the

FIFO buffer. See Section 11.3.2 on page 79.

data bytes

Remark: Keys cannot be read back

LoadKeyE2 0Bh

copies a key from the EEPROM into the key buffer

See Section 11.6.1 on page 81.

-

LoadKey

Authent1

19h

reads a key from the FIFO buffer and loads it into the byte 0 LSB

key buffer. See Section 11.6.2 on page 81.

byte 1

Remark: The key has to be prepared in a specific

format (refer to Section 9.2.3.1 “Key format” on page

13)

…

byte 10

byte 11 MSB

0Ch

performs the first part of card authentication using the card Authent1 command

-

Crypto1 algorithm. See Section 11.6.3 on page 82.

card block address

card serial number LSB

card serial number byte 1

card serial number byte 2

card serial number MSB

Authent2

14h

performs the second part of card authentication using

the Crypto1 algorithm. See Section 11.6.4 on

page 82.

-

LoadConfig

CalcCRC

07h

12h

reads data from EEPROM and initializes the

MFRC500 registers. See Section 11.4.1 on page 79.

start address LSB

start address MSB

data byte stream

-

activates the CRC coprocessor

Remark: The result of the CRC calculation is read

from the CRCResultLSB and CRCResultMSB

registers. See Section 11.4.2 on page 80.

[1] This command is the combination of the Transmit and Receive commands.

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11.1.1 Basic states

11.1.2 StartUp command 3Fh

Table 127. StartUp command 3Fh

Command

Value Action

Arguments

and data

Returned

data

StartUp

3Fh runs the reset and initialization phase

-

Remark: This command can only be activated by a Power-On or Hard reset.

The StartUp command runs the reset and initialization phases. It does not need or return,

any data. It cannot be activated by the microprocessor but is automatically started after

one of the following events:

• Power-On Reset (POR) caused by power-up on pin DVDD or on pin AVDD

• Negative edge on pin RSTPD

The reset phase comprises an asynchronous reset and configuration of certain register

bits. The initialization phase configures several registers with values stored in the

EEPROM.

When the StartUp command finishes, the Idle command is automatically executed.

Remark:

• The microprocessor must not write to the MFRC500 while it is still executing the

StartUp command. To avoid this, the microprocessor polls for the Idle command to

determine when the initialization phase has finished; see Section 9.7.4 on page 25.

• When the StartUp command is active, it is only possible to read from the Page 0

register.

• The StartUp command cannot be interrupted by the microprocessor.

11.1.3 Idle command 00h

Table 128. Idle command 00h

Command

Value

Action

Arguments Returned

and data

data

Idle

00h

no action; cancels current command

execution

-

The Idle command switches the MFRC500 to its inactive state where it waits for the next

command. It does not need or return, any data.

The device automatically enters the idle state when a command finishes. When this

happens, the MFRC500 sends an interrupt request by setting bit IdleIRq. When triggered

by the microprocessor, the Idle command can be used to stop execution of all other

commands (except the StartUp command) but this does not generate an interrupt request

(IdleIRq).

Remark: Stopping command execution with the Idle command does not clear the FIFO

buffer.

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11.2 Commands for card communication

The MFRC500 is a fully ISO/IEC 14443 A compliant reader IC. This enables the

command set to be more flexible and generalized when compared to dedicated MIFARE

reader ICs. Section 11.2.1 to Section 11.2.5 describe the command set for ISO/IEC 14443

A card communication and related communication protocols.

11.2.1 Transmit command 1Ah

Table 129. Transmit command 1Ah

Command Value

Action

Arguments Returned

and data

data

Transmit 1Ah

transmits data from FIFO buffer to card

data stream

-

The Transmit command reads data from the FIFO buffer and sends it to the transmitter. It

does not return any data. The Transmit command can only be started by the

microprocessor.

11.2.1.1 Using the Transmit command

To transmit data, one of the following sequences can be used:

1. All data to be transmitted to the card is written to the FIFO buffer while the Idle

command is active. Then the command code for the Transmit command is written to

the Command register.

Remark: This is possible for transmission of a data stream up to 64 bytes.

2. The command code for the Transmit command is stored in the Command register.

Since there is not any data available in the FIFO buffer, the command is only enabled

but transmission is not activated. Data transmission starts when the first data byte is

written to the FIFO buffer. To generate a continuous data stream on the RF interface,

the microprocessor must write the subsequent data bytes into the FIFO buffer in time.

Remark: This allows transmission of any data stream length but it requires data to be

written to the FIFO buffer in time.

3. Part of the data transmitted to the card is written to the FIFO buffer while the Idle

command is active. Then the command code for the Transmit command is written to

the Command register. While the Transmit command is active, the microprocessor

can send further data to the FIFO buffer. This is then appended by the transmitter to

the transmitted data stream.

Remark: This allows transmission of any data stream length but it requires data to be

written to the FIFO buffer in time.

When the transmitter requests the next data byte to ensure the data stream on the RF

interface is continuous and the FIFO buffer is empty, the Transmit command automatically

exits. This causes the internal state machine to change its state from transmit to idle.

When the data transmission to the card is finished, the TxIRq flag is set by the MFRC500

to indicate to the microprocessor transmission is complete.

Remark: If the microprocessor overwrites the transmit code in the Command register

with another command, transmission stops immediately on the next clock cycle. This can

produce output signals that are not in accordance with ISO/IEC 14443 A.

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11.2.1.2 RF channel redundancy and framing

Each ISO/IEC 14443 A frame transmitted consists of a Start Of Frame (SOF) pattern,

followed by the data stream and is closed by an End Of Frame (EOF) pattern. These

different phases of the transmission sequence can be monitored using the PrimaryStatus

register ModemState[2:0] bits; see Section 11.2.4 on page 75.

Depending on the setting of the ChannelRedundancy register bit TxCRCEn, the CRC is

calculated and appended to the data stream. The CRC is calculated according to the

settings in the ChannelRedundancy register. Parity generation is handled according to the

ChannelRedundancy register ParityEn and ParityOdd bits settings.

11.2.1.3 Transmission of bit oriented frames

The transmitter can be configured to send an incomplete last byte. To achieve this the

BitFraming register’s TxLastBits[2:0] bits must be set at above zero (for example, 1). This

is shown in Figure 14.

TxLastBits = 0

TxLastBits = 7

TxLastBits = 1

SOF

0

7

P

0

7

P

EOF

6

EOF

001aak618

Fig 14. Transmitting bit oriented frames

Figure 14 shows the data stream when bit ParityEn is set in the ChannelRedundancy

register. All fully transmitted bytes are followed by a parity check bit but the incomplete

byte is not followed by a parity check bit. After transmission, the TxLastBits[2:0] bits are

automatically cleared.

Remark: If the TxLastBits[2:0] bits are not equal to zero, CRC generation must be

disabled. This is done by clearing the ChannelRedundancy register TxCRCEn bit.

11.2.1.4 Transmission of frames with more than 64 bytes

To generate frames of more than 64 bytes, the microprocessor must write data to the

FIFO buffer while the Transmit command is active. The state machine checks the FIFO

buffer status when it starts transmitting the last bit of the data stream; the check time is

shown in Figure 15 with arrows.

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TxLastBits[2:0]

FIFOLength[6:0]

FIFO empty

TxLastBits = 0

0x01

0x00

TxData

check FIFO empty

accept further data

7

0

7

0

7

001aak619

Fig 15. Timing for transmitting byte oriented frames

As long as the internal signal accept further data is logic 1, data can be written to the FIFO

buffer. The MFRC500 appends this data to the data stream transmitted using the RF

interface.

If the internal accept further data signal is logic 0, the transmission terminates. All data

written to the FIFO buffer after the accept further data signal was set to logic 0 is not

transmitted, however, it remains in the FIFO buffer.

Remark: If parity generation is enabled (ParityEn = logic 1), the parity bit is the last bit

transmitted. This delays the accept further data signal by a duration of one bit.

If the TxLastBits[2:0] bits are not zero, the last byte is not transmitted completely. Only the

number of bits set by TxLastBits[2:0], starting with the least significant bit are transmitted.

This means that the internal state machine has to check the FIFO buffer status at an

earlier point in time; see Figure 16.

NWR (FIFO data)

TxLastBits[2:0]

FIFOLength[6:0]

FIFO empty

TxLastBits = 4

01h

00h

TxData

check FIFO empty

accept further data

4

7

0

3

4

7

0

3

001aak620

Fig 16. Timing for transmitting bit oriented frames

Since in this example TxLastBits[2:0] = 4, transmission stops after bit 3 is transmitted and

the frame is completed with an EOF, if configured.

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Figure 16 also shows write access to the FIFOData register just before the FIFO buffer’s

status is checked. This leads to FIFO empty state being held LOW which keeps the

accept further data active. The new byte written to the FIFO buffer is transmitted using the

RF interface.

Accept further data is only changed by the check FIFO empty function. This function

verifies FIFO empty for one bit duration before the last expected bit transmission.

Table 130. Transmission of frames of more than 64 bytes

Frame definition

8-bit with parity

Verification at:

8

7

^thbit

8-bit without parity

x-bit without parity

(x − 1)^thbit

11.2.2 Receive command 16h

Table 131. Receive command 16h

Command

Value

Action

Arguments Returned

and data

data

Receive

16h

activates receiver circuitry

-

data stream

The Receive command activates the receiver circuitry. All data received from the RF

interface is written to the FIFO buffer. The Receive command can be started either using

the microprocessor or automatically during execution of the Transceive command.

Remark: This command can only be used for test purposes since there is no timing

relationship to the Transmit command.

11.2.2.1 Using the Receive command

After starting the Receive command, the internal state machine decrements to the RxWait

register value on every bit-clock. The analog receiver circuitry is prepared and activated

from 3 down to 1. When the counter reaches 0, the receiver starts monitoring the incoming

signal at the RF interface.

When the signal strength reaches a level higher than the RxThreshold register

MinLevel[3:0] bits value, it starts decoding. The decoder stops when the signal can longer

be detected on the receiver input pin RX. The decoder sets bit RxIRq indicating receive

termination.

The different phases of the receive sequence are monitored using the PrimaryStatus

register ModemState[2:0] bits; see Section 11.2.4 on page 75.

Remark: Since the counter values from 3 to 0 are needed to initialize the analog receiver

circuitry, the minimum value for RxWait[7:0] is 3.

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11.2.2.2 RF channel redundancy and framing

The decoder expects the SOF pattern at the beginning of each data stream. When the

SOF is detected, it activates the serial-to-parallel converter and gathers the incoming data

bits. Every completed byte is forwarded to the FIFO buffer.

If an EOF pattern is detected or the signal strength falls below the RxThreshold register

MinLevel[3:0] bits setting, both the receiver and the decoder stop. Then the Idle command

is entered and an appropriate response for the microprocessor is generated (interrupt

request activated, status flags set).

When the ChannelRedundancy register bit RxCRCEn is set, a CRC block is expected.

The CRC block can be one byte or two bytes depending on the ChannelRedundancy

register CRC8 bit setting.

Remark: If the CRC block received is correct, it is not sent to the FIFO buffer. This is

realized by shifting the incoming data bytes through an internal buffer of either one or two

bytes (depending on the defined CRC). The CRC block remains in this internal buffer.

Consequently, all data bytes in the FIFO buffer are delayed by one or two bytes. If the

CRC fails, all received bytes are sent to the FIFO buffer including the faulty CRC.

If ParityEn is set in the ChannelRedundancy register, a parity bit is expected after each

byte. If ParityOdd = logic 1, the expected parity is odd, otherwise even parity is expected.

11.2.2.3 Collision detection

If more than one card is within the RF field during the card selection phase, they both

respond simultaneously. The MFRC500 supports the algorithm defined in

ISO/IEC 14443 A to resolve card serial number data collisions by performing the

anti-collision procedure. The basis for this procedure is the ability to detect bit-collisions.

Bit-collision detection is supported by the Manchester coding bit encoding scheme used in

the MFRC500. If in the first and second half-bit of a subcarrier, modulation is detected,

instead of forwarding a 1-bit or 0-bit, a bit-collision is indicated. The MFRC500 uses the

RxThreshold register CollLevel[3:0] bits setting to distinguish between a 1-bit or 0-bit and

a bit-collision. If the amplitude of the half-bit with smaller amplitude is larger than that

defined by the CollLevel[3:0] bits, the MFRC500 flags a bit-collision using the error flag

CollErr. If a bit-collision is detected in a parity bit, the ParityErr flag is set.

On a detected collision, the receiver continues receiving the incoming data stream. In the

case of a bit-collision, the decoder sends logic 1 at the collision position.

Remark: As an exception, if bit ZeroAfterColl is set, all bits received after the first

bit-collision are forced to zero, regardless whether a bit-collision or an unequivocal state

has been detected. This feature makes it easier for the control software to perform the

anti-collision procedure as defined in ISO/IEC 14443 A.

When the first bit collision in a frame is detected, the bit-collision position is stored in the

CollPos register.

Table 132 shows the collision positions.

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Table 132. Return values for bit-collision positions

Collision in bit

CollPos register value

(Decimal)

SOF

0

Least Significant Bit (LSB) of the Least Significant Byte (LSByte)

1

…

8

Most Significant Bit (MSB) of the LSByte

LSB of second byte

9

…

16

17

…

MSB of second byte

LSB of third byte

…

Parity bits are not counted in the CollPos register because bit-collisions in parity bit occur

after bit-collisions in the data bits. If a collision is detected in the SOF, a frame error is

flagged and no data is sent to the FIFO buffer. In this case, the receiver continues to

monitor the incoming signal. It generates the correct notifications to the microprocessor

when the end of the faulty input stream is detected. This helps the microprocessor to

determine when it is next allowed to send data to the card.

11.2.2.4 Receiving bit oriented frames

The receiver can manage byte streams with incomplete bytes which result in bit-oriented

frames. To support this, the following values may be used:

• BitFraming register’s RxAlign[2:0] bits select a bit offset for the first incoming byte. For

example, if RxAlign[2:0] = 3, the first 5 bits received are forwarded to the FIFO buffer.

Further bits are packed into bytes and forwarded. After reception, RxAlign[2:0] is

automatically cleared. If RxAlign[2:0] = logic 0, all incoming bits are packed into one

byte.

• RxLastBits[2:0] returns the number of bits valid in the last received byte. For example,

if RxLastBits[2:0] evaluates to 5 bits at the end of the received command, the 5 least

significant bits are valid. If the last byte is complete, RxLastBits[2:0] evaluates to zero.

RxLastBits[2:0] is only valid if a frame error is not indicated by the FramingErr flag. If

RxAlign[2:0] is not zero and ParityEn is active, the first parity bit is ignored and not

checked.

The first byte containing a single bit from the card is not sent to the microprocessor but

suppressed when If RxAlign[2:0] is set to 7 (see Section 10.5.2.4 on page 50).

Remark: Collisions detected at CollPos register bit positions 6, 14, 22, 30 and 38 cannot

be resolved using RxAlign[2:0]. They must be resolved using the control software.

11.2.2.5 Communication errors

The events which can set error flags are shown in Table 133.

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Table 133. Communication error table

Cause

Flag bit

FramingErr

CRCErr

Received data did not start with the SOF pattern

CRC block is not equal to the expected value

Received data is shorter than the CRC block

CRCErr

The parity bit is not equal to the expected value (i.e. a bit-collision, not parity)

A bit-collision is detected

ParityErr

CollErr

11.2.3 Transceive command 1Eh

Table 134. Transceive command 1Eh

Command Value

Action

Arguments Returned

and data data

Transceive 1Eh

transmits data from FIFO buffer to the card data stream data stream

and then automatically activates the

receiver

The Transceive command first executes the Transmit command (see Section 11.2.1 on

page 69) and then starts the Receive command (see Section 11.2.2 on page 72). All data

transmitted is sent using the FIFO buffer and all data received is written to the FIFO buffer.

The Transceive command can only be started by the microprocessor.

Remark: To adjust the timing relationship between transmitting and receiving, use the

RxWait register. This register is used to define the time delay between the last bit

transmitted and activation of the receiver. In addition, the BitPhase register determines the

phase-shift between the transmitter and receiver clock.

11.2.4 Card communication states

The status of the transmitter and receiver state machine can be read from bits

ModemState[2:0] in the PrimaryStatus register.

The assignment of ModemState[2:0] to the internal action is shown in Table 135.

Table 135. Meaning of ModemState

ModemState State

[2:0]

Description

000

001

010

Idle

transmitter and/or receiver are not operating

transmitting the SOF pattern

TxSOF

TxData

transmitting data or redundancy check (CRC) bits from the FIFO

buffer

011

100

TxEOF

transmitting the EOF pattern

GoToRx1

GoToRx2

PrepareRx

AwaitingRx

Receiving

intermediate state passed, when receiver starts

intermediate state passed, when receiver finishes

waiting until the RxWait register time period expires

receiver activated; waiting for an input signal on pin RX

receiving data

101

110

111

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11.2.5 Card communication state diagram

COMMAND =

TRANSMIT,

RECEIVE OR

TRANSCEIVE

IDLE

(000)

FIFO not empty

and command =

command = Receive

Transmit or Transceive

TxSOF

GoToRx1

(001)

(100)

SOF transmitted

next bit clock

TxData

(010)

Prepare Rx

(101)

EOF transmitted and

command = Transceive

data transmitted

RxWaitC[7:0] = 0

TxEOF

(011)

Awaiting Rx

(110)

RxMultiple = 1

signal strength > MinLevel[3:0]

EOF transmitted and

command = Transmit

RECEIVING

(111)

frame received

end of receive frame

and

RxMultiple = 0

GoToRx2

(100)

SET

COMMAND REGISTER = IDLE

(000)

001aak621

Fig 17. Card communication state diagram

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11.3 EEPROM commands

11.3.1 WriteE2 command 01h

Table 136. WriteE2 command 01h

Command Value Action

FIFO

Arguments and

data

Returned

data

WriteE2

01h

get data from FIFO buffer and write it start address LSB

-

to the EEPROM

start address MSB

data byte stream

The WriteE2 command interprets the first two bytes in the FIFO buffer as the EEPROM

start byte address. Any further bytes are interpreted as data bytes and are programmed

into the EEPROM, starting from the given EEPROM start byte address. This command

does not return any data.

The WriteE2 command can only be started by the microprocessor. It will not stop

automatically but has to be stopped explicitly by the microprocessor by issuing the Idle

command.

11.3.1.1 Programming process

One byte up to 16 bytes can be programmed into the EEPROM during a single

programming cycle. The time needed is approximately 5.8 ms.

The state machine copies all the prepared data bytes to the FIFO buffer and then to the

EEPROM input buffer. The internal EEPROM input buffer is 16 bytes long which is equal

to the block size of the EEPROM. A programming cycle is started if the last position of the

EEPROM input buffer is written or if the last byte of the FIFO buffer has been read.

The E2Ready flag remains logic 0 when there are unprocessed bytes in the FIFO buffer or

the EEPROM programming cycle is still in progress. When all the data from the FIFO

buffer are programmed into the EEPROM, the E2Ready flag is set to logic 1. Together

with the rising edge of E2Ready the TxIRq interrupt request flag shows logic 1. This can

be used to generate an interrupt when programming of all data is finished.

Once E2Ready = logic 1, the WriteE2 command can be stopped by the microprocessor by

sending the Idle command.

Remark: During the EEPROM programming indicated by E2Ready = logic 0, the WriteE2

command cannot be stopped using any other command.

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11.3.1.2 Timing diagram

Figure 18 shows programming five bytes into the EEPROM.

t

prog,del

NWR

data

write addr addr

E2 LSB MSB

Idle

command

byte 0 byte 1

byte 2

byte 3

byte 4

WriteE2

command active

t

prog

EEPROM

programming

byte 1, byte 2 and byte 3

programming byte 0

programming byte 4

E2Ready

TxIRq

001aak623

Fig 18. EEPROM programming timing diagram

Assuming that the MFRC500 finds and reads byte 0 before the microprocessor is able to

write byte 1 (t_prog,del= 300 ns). This causes the MFRC500 to start the programming cycle

(t_prog), which takes approximately 5.8 ms to complete. In the meantime, the

microprocessor stores byte 1 to byte 4 in the FIFO buffer.

If the EEPROM start byte address is 16Ch then byte 0 is stored at that address. The

MFRC500 copies the subsequent data bytes into the EEPROM input buffer. Whilst

copying byte 3, it detects that this data byte has to be programmed at the EEPROM byte

address 16Fh. As this is the end of the memory block, the MFRC500 automatically starts

a programming cycle.

Next, byte 4 is programmed at the EEPROM byte address 170h. As this is the last data

byte, the E2Ready and TxIRq flags are set indicating the end of the EEPROM

programming activity.

Although all data has been programmed into the EEPROM, the MFRC500 stays in the

WriteE2 command. Writing more data to the FIFO buffer would lead to another EEPROM

programming cycle continuing from EEPROM byte address 171h. The command is

stopped using the Idle command.

11.3.1.3 WriteE2 command error flags

Programming is restricted for EEPROM block 0 (EEPROM byte address 00h to 0Fh). If

you program these addresses, the AccessErr flag is set and a programming cycle is not

started.

Addresses above 1FFh are taken modulo 200h; see Section 9.2 on page 10 for the

EEPROM memory organization.

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11.3.2 ReadE2 command 03h

Table 137. ReadE2 command 03h

Command Value Action

Arguments

Returned data

ReadE2

03h

reads EEPROM data and

stores it in the FIFO buffer

start address LSB

start address MSB

number of data bytes

data bytes

The ReadE2 command interprets the first two bytes stored in the FIFO buffer as the

EEPROM starting byte address. The next byte specifies the number of data bytes

returned.

When all three argument bytes are available in the FIFO buffer, the specified number of

data bytes is copied from the EEPROM into the FIFO buffer, starting from the given

EEPROM starting byte address.

The ReadE2 command can only be triggered by the microprocessor and it automatically

stops when all data has been copied.

11.3.2.1 ReadE2 command error flags

Reading is restricted to EEPROM blocks 8h to 1Fh (key memory area). Reading from

these addresses sets the flag AccessErr = logic 1.

Addresses above 1FFh are taken as modulo 200h; see Section 9.2 on page 10 for the

EEPROM memory organization.

11.4 Diverse commands

11.4.1 LoadConfig command 07h

Table 138. LoadConfig command 07h

Command

Value Action

Arguments and

data

Returned data

LoadConfig

07h

reads data from EEPROM and start address LSB

-

initializes the registers

start address MSB

The LoadConfig command interprets the first two bytes found in the FIFO buffer as the

EEPROM starting byte address. When the two argument bytes are available in the FIFO

buffer, 32 bytes from the EEPROM are copied into the Control and other relevant

registers, starting at the EEPROM starting byte address. The LoadConfig command can

only be started by the microprocessor and it automatically stops when all relevant

registers have been copied.

11.4.1.1 Register assignment

The 32 bytes of EEPROM content are written to the MFRC500 registers 10h to register

2Fh; see Section 9.2 on page 10 for the EEPROM memory organization.

Remark: The procedure for the register assignment is the same as it is for the StartUp

initialization (see Section 9.7.3 on page 25). The difference is, the EEPROM starting byte

address for the startup initialization is fixed to 10h (block 1, byte 0). However, it can be

chosen with the LoadConfig command.

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11.4.1.2 Relevant LoadConfig command error flags

Valid EEPROM starting byte addresses are between 10h and 60h.

Copying from block 8h to 1Fh (keys) is restricted. Reading from these addresses sets the

flag AccessErr = logic 1.

Addresses above 1FFh are taken as modulo 200h; see Section 9.2 on page 10 for the

EEPROM memory organization.

11.4.2 CalcCRC command 12h

Table 139. CalcCRC command 12h

Command Value Action

Arguments and

data

Returned data

CalcCRC 12h activates the CRC coprocessor

data byte stream

-

The CalcCRC command takes all the data from the FIFO buffer as the input bytes for the

CRC coprocessor. All data stored in the FIFO buffer before the command is started is

processed.

This command does not return any data to the FIFO buffer but the content of the CRC can

be read using the CRCResultLSB and CRCResultMSB registers.

The CalcCRC command can only be started by the microprocessor and it does not

automatically stop. It must be stopped by the microprocessor sending the Idle command.

If the FIFO buffer is empty, the CalcCRC command waits for further input before

proceeding.

11.4.2.1 CRC coprocessor settings

Table 140 shows the parameters that can be configured for the CRC coprocessor.

Table 140. CRC coprocessor parameters

Parameter

Value

Bit

Register

CRC register

length

8-bit or 16-bit CRC

CRC8

ChannelRedundancy

CRC algorithm

ISO/IEC 14443 A or ISO/IEC 3309 CRC3309

ChannelRedundancy

CRC preset value any

CRCPresetLSB CRCPresetLSB

CRCPresetMSB CRCPresetMSB

The CRC polynomial for the 8-bit CRC is fixed to x⁸+ x⁴+ x³+ x²+ 1.

The CRC polynomial for the 16-bit CRC is fixed to x¹⁶+ x¹²+ x⁵+ 1.

11.4.2.2 CRC coprocessor status flags

The CRCReady status flag indicates that the CRC coprocessor has finished processing

all the data bytes in the FIFO buffer. When the CRCReady flag is set to logic 1, an

interrupt is requested which sets the TxIRq flag. This supports interrupt driven use of the

CRC coprocessor.

When CRCReady and TxIRq flags are set to logic 1 the content of the CRCResultLSB

and CRCResultMSB registers and the CRCErr flag are valid. The CRCResultLSB and

CRCResultMSB registers hold the content of the CRC, the CRCErr flag indicates CRC

validity for the processed data.

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11.5 Error handling during command execution

If an error is detected during command execution, the PrimaryStatus register Err flag is

set. The microprocessor can evaluate the status flags in the ErrorFlag register to get

information about the cause of the error.

Table 141. ErrorFlag register error flags overview

Error flag

KeyErr

Related commands

LoadKeyE2, LoadKey

WriteE2, ReadE2, LoadConfig

no specific commands

Receive, Transceive, CalcCRC

Receive, Transceive

AccessErr

FIFOOvlf

CRCErr

FramingErr

ParityErr

CollErr

Receive, Transceive

11.6 MIFARE security commands

11.6.1 LoadKeyE2 command 0Bh

Table 142. LoadKeyE2 command 0Bh

Command

Value Action

Arguments and

data

Returned

data

LoadKeyE2

0Bh

reads a key from the EEPROM and start address LSB

-

puts it into the internal key buffer

start address MSB

The LoadKeyE2 command interprets the first two bytes found in the FIFO buffer as the

EEPROM starting byte address. The EEPROM bytes starting from the given starting byte

address are interpreted as the key when stored in the correct key format as described in

Section 9.2.3.1 “Key format” on page 13. When both argument bytes are available in the

FIFO buffer, the command executes.

The LoadKeyE2 command can only be started by the microprocessor and it automatically

stops after copying the key from the EEPROM to the key buffer.

11.6.1.1 Relevant LoadKeyE2 command error flags

If the key format is incorrect (see Section 9.2.3.1 “Key format” on page 13) an undefined

value is copied into the key buffer and the KeyErr flag is set.

11.6.2 LoadKey command 19h

Table 143. LoadKey command 19h

Command Value Action

Arguments and Returned

data

LoadKey

19h

reads a key from the FIFO buffer and puts it byte 0 (LSB)

-

into the key buffer

byte 1

…

byte 10

byte 11 (MSB)

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The LoadKey command interprets the first twelve bytes it finds in the FIFO buffer as the

key when stored in the correct key format as described in Section 9.2.3.1 “Key format” on

page 13. When the twelve argument bytes are available in the FIFO buffer they are

checked and, if valid, are copied into the key buffer.

The LoadKey command can only be started by the microprocessor and it automatically

stops after copying the key from the FIFO buffer to the key buffer.

11.6.2.1 Relevant LoadKey command error flags

All bytes requested are copied from the FIFO buffer to the key buffer. If the key format is

not correct (see Section 9.2.3.1 “Key format” on page 13) an undefined value is copied

into the key buffer and the KeyErr flag is set.

11.6.3 Authent1 command 0Ch

Table 144. Authent1 command 0Ch

Command Value Action

Arguments and data

Returned

data

Authent1

0Ch

performs the first part of the Crypto1 card Authent1 command

-

card authentication

card block address

card serial number LSB

card serial number byte1

card serial number byte2

card serial number MSB

The Authent1 command is a special Transceive command; it sends six argument bytes to

the card. The card’s response is not sent to the microprocessor, it is used instead to

authenticate the card to the MFRC500 and vice versa.

The Authent1 command can be triggered only by the microprocessor. The sequence of

states for this command are the same as those for the Transceive command; see

Section 11.2.3 on page 75.

11.6.4 Authent2 command 14h

Table 145. Authent2 command 14h

Command Value Action

Arguments

and data

Returned

data

Authent2

14h

performs the second part of the card

-

authentication using the Crypto1 algorithm

The Authent2 command is a special Transceive command. It does not need an argument

byte, however all the data needed to be sent to the card is assembled by the MFRC500.

The card response is not sent to the microprocessor but is used to authenticate the card

to the MFRC500 and vice versa.

The Authent2 command can only be started by the microprocessor. The sequence of

states for this command are the same as those for the Transceive command; see

Section 11.2.3 on page 75.

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11.6.4.1 Authent2 command effects

If the Authent2 command is successful, the authenticity of card and the MFRC500 are

proved. This automatically sets the Crypto1On control bit. When bit Crypto1On = logic 1,

all further card communication is encrypted using the Crypto1 security algorithm. If the

Authent2 command fails, bit Crypto1On is cleared (Crypto1On = logic 0).

Remark: The Crypto1On flag can only be set by a successfully executed Authent2

command and not by the microprocessor. The microprocessor can clear bit Crypto1On to

continue with unencrypted (plain) card communication.

Remark: The Authent2 command must be executed immediately after a successful

Authent1 command; see Section 11.6.3 “Authent1 command 0Ch”. In addition, the keys

stored in the key buffer and those on the card must match.

12. Limiting values

Table 146. Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol

T_amb

Parameter

Conditions

Min

−40

Max

Unit

°C

V

ambient temperature

storage temperature

digital supply voltage

analog supply voltage

TVDD supply voltage

input voltage (absolute value)

+150

+6

T_stg

−40

V_DDD

V_DDA

−0.5

+6

V

V_DD(TVDD)

|V_i|

+6

V

on any digital pin to DVSS

on pin RX to AVSS

V_DDD+ 0.5

V_DDA+ 0.5

V

13. Characteristics

13.1 Operating condition range

Table 147. Operating condition range

Symbol

T_amb

Parameter

Conditions

Min

−25

4.5

3.0

-

Typ

+25

5.0

-

Max

+85

5.5

Unit

ambient temperature

digital supply voltage

analog supply voltage

TVDD supply voltage

-

°C

V

V_DDD

DVSS = AVSS = TVSS = 0 V

V_DDA

5.5

V

V_DD(TVDD)

V_ESD

5.5

V

electrostatic discharge voltage Human Body Model (HBM); 1.5 kΩ,

1000

V

100 pF

Machine Model (MM); 0.75 μH,

-

100

V

200 pF

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13.2 Current consumption

Table 148. Current consumption

Symbol

Parameter

Conditions

Min Typ

Max

11

Unit

mA

μA

I_DDD

digital supply current

Idle command

-

8

Standby mode

3

5

Soft power-down mode

Hard power-down mode

Idle command; receiver on

Idle command; receiver off

Standby mode

800

1

1000

10

40

15

13

10

150

7

μA

I_DDA

analog supply current

TVDD supply current

25

12

10

1

mA

μA

Soft power-down mode

Hard power-down mode

continuous wave

1

μA

I_DD(TVDD)

-

mA

pins TX1 and TX2 unconnected;

TX1RFEn and TX2RFEn = logic 1

5.5

pins TX1 and TX2 unconnected;

TX1RFEn and TX2RFEn = logic 0

-

65

130

μA

13.3 Pin characteristics

13.3.1 Input pin characteristics

Pins D0 to D7, A0, and A1 have TTL input characteristics and behave as defined in

Table 149.

Table 149. Standard input pin characteristics

Symbol

I_LI

Parameter

Conditions

Min

Typ

Max

Unit

input leakage current

threshold voltage

−1.0

-

+1.0

μA

V

V_th

CMOS: V_DDD< 3.6 V

TTL: 4.5 < V_DDD

0.35V_DDD

0.8

0.65V_DDD

2.0

V

The digital input pins NCS, NWR, NRD, ALE, A2, and MFIN have Schmitt trigger

characteristics, and behave as defined in Table 150.

Table 150. Schmitt trigger input pin characteristics

Symbol

I_LI

Parameter

Conditions

Min

−1.0

1.4

Typ

Max

+1.0

2.0

Unit

μA

V

input leakage current

threshold voltage

-

V_th

positive-going threshold;

TTL = 4.5 < V_DDD

CMOS = V_DDD< 3.6 V

negative-going threshold;

TTL = 4.5 < V_DDD

0.65V_DDD

0.8

-

0.75V_DDD

1.3

V

CMOS = V_DDD< 3.6 V

0.25V_DDD

-

0.4V_DDD

V

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Pin RSTPD has Schmitt trigger CMOS characteristics. In addition, it is internally filtered by

a RC low-pass filter which causes a propagation delay on the reset signal.

Table 151. RSTPD input pin characteristics

Symbol Parameter

Conditions

Min

Typ Max

Unit

μA

V

I_LI

input leakage current

−1.0

-

+1.0

V_th

threshold voltage

positive-going threshold;

CMOS = V_DDD< 3.6 V

0.65V_DDD

0.75V_DDD

negative-going threshold;

CMOS = V_DDD< 3.6 V

0.25V_DDD

-

0.4V_DDD

20

V

t_PD

propagation delay

μs

The analog input pin RX has the input capacitance and input voltage range shown in

Table 152.

Table 152. RX input capacitance and input voltage range

Symbol

C_i

Parameter

Conditions

Min Typ Max Unit

input capacitance

-

15

pF

V_i(dyn)

dynamic input voltage V_DDA= 5 V; T_amb= 25 °C

1.1

4.4

V

13.3.2 Digital output pin characteristics

Pins D0 to D7, MFOUT and IRQ have CMOS output characteristics and behave as

defined in Table 153.

Table 153. Digital output pin characteristics

Symbol Parameter

Conditions

Min Typ Max Unit

V_OH

V_OL

I_O

HIGH-level output

voltage

V_DDD= 5 V; I_OH= −1 mA

V_DDD= 5 V; I_OH= −10 mA

V_DDD= 5 V; I_OL= 1 mA

V_DDD= 5 V; I_OL= 10 mA

source or sink; V_DDD= 5 V

2.4

4.9

4.2

25

-

V

2.4

LOW-level output

voltage

-

400 mV

250 400 mV

- 10 mA

output current

Remark: Pin IRQ can be configured as open collector which causes the V_OHvalues to be

no longer applicable.

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13.3.3 Antenna driver output pin characteristics

The source conductance of the antenna driver pins TX1 and TX2 for driving the

HIGH-level can be configured using the CwConductance register’s GsCfgCW[5:0] bits,

while their source conductance for driving the LOW-level is constant.

The antenna driver default configuration output characteristics are specified in Table 154.

Table 154. Antenna driver output pin characteristics

Symbol Parameter

Conditions

Min Typ Max Unit

V_OH

V_OL

I_O

HIGH-level output

voltage

V_DD(TVDD)= 5.0 V; I_OL= 20 mA

V_DD(TVDD)= 5.0 V; I_OL= 100 mA

V_DD(TVDD)= 5.0 V; I_OL= 20 mA

V_DD(TVDD)= 5.0 V; I_OL= 100 mA

-

4.97

4.85

30

-

V

LOW-level output

voltage

mV

150

-

output current

transmitter; continuous wave;

peak-to-peak

200 mA

13.4 AC electrical characteristics

13.4.1 Separate read/write strobe bus timing

Table 155. Timing specification for separate read/write strobe

Symbol

t_LHLL

Parameter

Conditions

Min Typ Max Unit

ALE HIGH time

20

15

8

-

ns

t_AVLL

address valid to ALE LOW time

t_LLAX

address hold after ALE LOW

time

t_LLRWL

t_SLRWL

t_RWHSH

t_RLDV

ALE LOW to read/write LOW

time

ALE LOW to NRD or

NWR LOW

15

0

-

ns

chip select LOW to read/write NCS LOW to NRD or

LOW time NWR LOW

-

read/write HIGH to chip select NRD or NWR HIGH to

HIGH time

-

NCS HIGH

read LOW to data input valid

time

NRD LOW to data valid

65

20

35

-

t_RHDZ

read HIGH to data input high

impedance time

NRD HIGH to data

high-impedance

-

t_WLQV

t_WHDX

write LOW to data output valid NWR LOW to data valid

time

-

data output hold after write

HIGH time

data hold time after

NWR HIGH

8

t_RWLRWH

t_AVRWL

read/write LOW time

NRD or NWR

65

30

-

ns

address valid to read/write

LOW time

NRD or NWR LOW

(set-up time)

t_WHAX

address hold after write HIGH NWR HIGH (hold time)

time

8

-

ns

t_RWHRWL

read/write HIGH time

150

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t

LHLL

ALE

t

RWHSH

SLRWL

NCS

t

LLRWL

t

RWHRWL

RWLRWH

NWR

NRD

t

WHDX

WLQV

t

LLAX

AVLL

t

RLDV

RHDZ

D0 to D7

A0 to A2

D0 to D7

Multiplexed address bus

t

WHAX

AVRWL

A0 to A2

Separated address bus

001aaj638

Fig 19. Separate read/write strobe timing diagram

Remark: The signal ALE is not relevant for separate address/data bus and the

multiplexed addresses on the data bus do not care. The multiplexed address and data bus

address lines (A0 to A2) must be connected as described in Section 9.1.3 on page 8.

13.4.2 Common read/write strobe bus timing

Table 156. Common read/write strobe timing specification

Symbol

t_LHLL

Parameter

Conditions

Min Typ Max Unit

ALE HIGH time

20

15

8

-

ns

t_AVLL

address valid to ALE LOW time

address hold after ALE LOW time

t_LLAX

t_LLDSL

ALE LOW to data strobe LOW time NWR or NRD

LOW

15

t_SLDSL

chip select LOW to data strobe

LOW time

NCS LOW to

NDS LOW

0

-

ns

t_DSHSH

t_DSLDV

t_DSHDZ

t_DSLQV

t_DSHQX

t_DSHRWX

t_DSLDSH

data strobe HIGH to chip select

HIGH time

-

data strobe LOW to data input valid

time

65

20

35

-

data strobe HIGH to data input high

impedance time

-

data strobe LOW to data output

valid time

NDS/NCS LOW

-

data output hold after data strobe

HIGH time

NDS HIGH (write

cycle hold time)

8

65

RW hold after data strobe HIGH

time

after NDS HIGH

-

data strobe LOW time

NDS/NCS

-

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Table 156. Common read/write strobe timing specification …continued

Symbol

Parameter

Conditions

Min Typ Max Unit

t_AVDSL

address valid to data strobe LOW

time

30

-

ns

t_RHAX

address hold after read HIGH time

data strobe HIGH time

8

-

ns

t_DSHDSL

period between

write sequences

150

t_WLDSL

write LOW to data strobe LOW time R/NW valid to

NDS LOW

8

-

ns

t

LHLL

ALE

t

DSHSH

SLDSL

NCS/NDS

R/NW

t

DSHRWX

WLDSL

t

LLDSL

t

DSHDSL

DSLDSH

NRD

D0 to D7

A0 to A2

t

DSHQX

DSLDV

t

LLAX

AVLL

t

DSLQV

DSHDZ

A0 to A2

D0 to D7

Multiplexed address bus

t

RHAX

AVDSL

A0 to A2

Separated address bus

001aaj639

Fig 20. Common read/write strobe timing diagram

13.4.3 EPP bus timing

Table 157. Common read/write strobe timing specification for EPP

Symbol

t_ASLASH

t_AVASH

Parameter

Conditions

Min Typ Max Unit

address strobe LOW time

nAStrb

20

15

-

ns

address valid to address strobe

HIGH time

multiplexed address

bus set-up time

t_ASHAV

t_SLDSL

t_DSHSH

t_DSLDV

address valid after address strobe

HIGH time

multiplexed address

bus hold time

8

0

-

ns

chip select LOW to data strobe

LOW time

NCS LOW to nDStrb

LOW

-

data strobe HIGH to chip select

HIGH time

nDStrb HIGH to

NCS HIGH

-

data strobe LOW to data input valid read cycle

time

65

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Table 157. Common read/write strobe timing specification for EPP …continued

Symbol Parameter Conditions Min Typ Max Unit

t_DSHDZ

t_DSLQV

t_DSHQX

t_DSHWX

data strobe HIGH to data input high read cycle

impedance time

-

20

35

-

ns

data strobe LOW to data output

valid time

nDStrb LOW

NCS HIGH

nWrite

-

data output hold after data strobe

HIGH time

8

write hold after data strobe HIGH

time

-

t_DSLDSH

t_WLDSL

data strobe LOW time

nDStrb

65

8

-

ns

write LOW to data strobe LOW time nWrite valid to

nDStrb LOW

t_DSL-WAITHdata strobe LOW to WAIT HIGH

time

nDStrb LOW to

nWrite HIGH

-

75

ns

t_DSH-WAITLdata strobe HIGH to WAIT LOW

time

nDStrb HIGH to

nWrite LOW

t

DSHSH

t

SLDSL

NCS

t

DSHWX

WLDSL

nWrite

t

DSLDSH

nDStrb

nAStrb

t

DSLDV

DSHQX

DSHDZ

t

DSLQV

D0 to D7

A0 toA7

D0 to D7

nWait

t

DSH-WAITL

DSL-WAITH

001aaj640

Fig 21. Timing diagram for common read/write strobe; EPP

Remark: Figure 21 does not distinguish between the address write cycle and a data write

cycle. The timings for the address write and data write cycle are different. In EPP mode,

the address lines (A0 to A2) must be connected as described in Section 9.1.3 on page 8.

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13.4.4 Clock frequency

The clock input is pin OSCIN.

Table 158. Clock frequency

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

f_clk

clock frequency

checked by the clock

filter

-

13.56

-

MHz

δ_clk

clock duty cycle

jitter time

40

-

50

-

60

10

%

t_jit

of clock edges

ps

The clock applied to the MFRC500 acts as a time constant for the synchronous system’s

encoder and decoder. The stability of the clock frequency is an important factor for

ensuring proper performance. To obtain highest performance, clock jitter must be as small

as possible. This is best achieved using the internal oscillator buffer and the

recommended circuitry; see Section 9.8 on page 26.

14. EEPROM characteristics

The EEPROM size is 32 × 16 × 8 = 4096 bit.

Table 159. EEPROM characteristics

Symbol

Parameter

Conditions

Min

Typ Max

Unit

Hz

N_{endu(W_ER)}write or erase endurance erase/write cycles

100.000

-

t_ret

retention time

erase time

T_amb≤ 55 °C

10

-

year

ms

t_er

2.9

t_a(W)

write access time

-

ms

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15. Application information

15.1 Typical application

15.1.1 Circuit diagram

Figure 22 shows a typical application where the antenna is directly matched to the

MFRC500:

DVDD

Reset

AVDD

TVDD

RSTPD

control lines

data bus

C1

L0

TX1

MICROPROCESSOR

BUS

C0

C2a

C2b

C3

MICROPROCESSOR

TVSS

TX2

C1

R1

DEVICE

IRQ

RX

R2

VMID

DVSS

OSCIN

OSCOUT AVSS

13.56 MHz

C4

100 nF

15 pF

001aak625

Fig 22. Application example circuit diagram: directly matched antenna

15.1.2 Circuit description

The matching circuit consists of an EMC low-pass filter (L0 and C0), matching circuitry

(C1 and C2), a receiver circuit (R1, R2, C3 and C4) and the antenna itself.

Refer to the following application notes for more detailed information about designing and

tuning an antenna.

• MICORE reader IC family; Directly Matched Antenna Design Ref. 1

• MIFARE (14443 A) 13.56 MHz RFID Proximity Antennas Ref. 2.

15.1.2.1 EMC low-pass filter

The MIFARE system operates at a frequency of 13.56 MHz. This frequency is generated

by a quartz oscillator to clock the MFRC500. It is also the basis for driving the antenna

using the 13.56 MHz energy carrier. This not only causes power emissions at 13.56 MHz,

it also emits power at higher harmonics. International EMC regulations define the

amplitude of the emitted power over a broad frequency range. To meet these regulations,

appropriate filtering of the output signal is required.

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A multilayer board is recommended to implement a low-pass filter as shown in Figure 22.

The low-pass filter consists of the components L0 and C0. The recommended values are

given in Application notes MICORE reader IC family; Directly Matched Antenna Design

Ref. 1 and MIFARE (14443 A) 13.56 MHz RFID Proximity Antennas Ref. 2.

Remark: To achieve best performance, all components must be at least equal in quality to

those recommended.

Remark: The layout has a major influence on the overall performance of the filter.

15.1.2.2 Antenna matching

Due to the impedance transformation of the low-pass filter, the antenna coil has to be

matched to a given impedance. The matching elements C1 and C2 can be estimated and

have to be fine tuned depending on the design of the antenna coil.

The correct impedance matching is important to ensure optimum performance. The

overall quality factor has to be considered to guarantee a proper ISO/IEC 14443 A

communication scheme. Environmental influences have to considered and common EMC

design rules.

Refer to Application notes MICORE reader IC family; Directly Matched Antenna Design

Ref. 1 and MIFARE (14443 A) 13.56 MHz RFID Proximity Antennas Ref. 2 for details.

Remark: Do not exceed the current limits (I_DD(TVDD)), otherwise the chip might be

destroyed.

Remark: The overall 13.56 MHz RFID proximity antenna design in combination with the

MFRC500 IC does not require any specialist RF knowledge. However, all relevant

parameters have to be considered to guarantee optimum performance and international

EMC compliance.

15.1.2.3 Receiver circuit

The internal receiver of the MFRC500 makes use of both subcarrier load modulation

side-bands. No external filtering is required.

It is recommended to use the internally generated VMID potential as the input potential for

pin RX. This VMID DC voltage level has to be coupled to pin RX using resistor (R2). To

provide a stable DC reference voltage, a capacitor (C4) must be connected between

VMID and ground.

The AC voltage divider of R1 + C3 and R2 has to be designed taking in to account the AC

voltage limits on pin RX. Depending on the antenna coil design and the impedance,

matching the voltage at the antenna coil will differ. Therefore the recommended way to

design the receiver circuit is to use the given values for R1, R2, and C3; refer to

Application note; MIFARE (14443 A) 13.56 MHz RFID Proximity Antennas Ref. 2. The

voltage on pin RX can be altered by varying R1 within the given limits.

Remark: R2 is AC connected to ground using C4.

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15.1.2.4 Antenna coil

The precise calculation of the antenna coil’s inductance is not practicable but the

inductance can be estimated using Equation 10. We recommend designing an antenna

that is either circular or rectangular.

I₁

1.8

⎛

⎞

------

L₁[nH] = 2 ⋅ I₁[cm] ⋅ ln 〈 〉 – K N₁

(10)

⎝

⎠

D₁

• l₁= length of one turn of the conductor loop

• D₁= diameter of the wire or width of the PCB conductor, respectively

• K = antenna shape factor (K = 1.07 for circular antennas and K = 1.47 for square

antennas)

• N₁= number of turns

• ln = natural logarithm function

The values of the antenna inductance, resistance, and capacitance at 13.56 MHz depend

on various parameters such as:

• antenna construction (type of PCB)

• thickness of conductor

• distance between the windings

• shielding layer

• metal or ferrite in the near environment

Therefore a measurement of these parameters under real life conditions or at least a

rough measurement and a tuning procedure is highly recommended to guarantee

adequate performance. Refer to Application notes MICORE reader IC family; Directly

Matched Antenna Design Ref. 1 and MIFARE (14443 A) 13.56 MHz RFID Proximity

Antennas Ref. 2 for details.

15.2 Test signals

The MFRC500 allows different kinds of signal measurements. These measurements can

be used to check the internally generated and received signals using the serial signal

switch as described in Section 9.11 on page 33.

In addition, the MFRC500 enables users to select between:

• internal analog signals for measurement on pin AUX

• internal digital signals for observation on pin MFOUT (based on register selections)

These measurements can be helpful during the design-in phase to optimize the receiver’s

behavior, or for test purposes.

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15.2.1 Measurements using the serial signal switch

Using the serial signal switch on pin MFOUT, data is observed that is sent to the card or

received from the card. Table 160 gives an overview of the different signals available.

Table 160. Signal routed to pin MFOUT

SignalToMFOUT

MFOUTSelect

Signal routed to pin MFOUT

LOW

0

1

0

1

2

3

4

5

6

7

X

HIGH

envelope

transmit NRZ

Manchester with subcarrier

Manchester

reserved

digital test signal

15.2.1.1 TX control

Figure 23 shows as an example of an ISO/IEC 14443 A communication.

The signal is measured on pin MFOUT using the serial signal switch to control the data

sent to the card. Setting the flag MFOUTSelect[2:0] = 3 sends the data to the card coded

as NRZ. Setting MFOUTSelect[2:0] = 2 shows the data as a Miller coded signal.

The RFOut signal is measured directly on the antenna and gives the RF signal pulse

shape. Refer to Application note Directly matched Antenna - Excel calculation (Ref. 3) for

detail information on the RF signal pulse.

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(1)

(2)

(3)

10 μs per division

001aak626

(1) MFOUTSelect[2:0] = 3; serial data stream; 2 V per division.

(2) MFOUTSelect[2:0] = 2; serial data stream; 2 V per division.

(3) RFOut; 1 V per division.

Fig 23. TX control signals

15.2.1.2 RX control

Figure 24 shows an example of ISO/IEC 14443 A communication which represents the

beginning of a card’s answer to a request signal.

The RF signal shows the RF voltage measured directly on the antenna so that the card’s

load modulation is visible. Setting MFOUTSelect[2:0] = 4 shows the Manchester decoded

signal with subcarrier. Setting MFOUTSelect[2:0] = 5 shows the Manchester decoded

signal.

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(1)

(2)

(3)

10 μs per division

001aak627

(1) RFOut; 1 V per division.

(2) MFOUTSelect[2:0] = 4; Manchester with subcarrier; 2 V per division.

(3) MFOUTSelect[2:0] = 5; Manchester; 2 V per division.

Fig 24. RX control signals

15.2.2 Analog test signals

The analog test signals can be routed to pin AUX by selecting them using the

TestAnaSelect register TestAnaOutSel[4:0] bits.

Table 161. Analog test signal selection

Value Signal Name Description

0

1

2

3

4

5

6

VMID

voltage at internal node VMID

Vbandgap

VRxFollI

VRxFollQ

VRxAmpI

VRxAmpQ

VCorrNI

internal reference voltage generated by the bandgap

output signal from the demodulator using the I-clock

output signal from the demodulator using the Q-clock

I-channel subcarrier signal amplified and filtered

Q-channel subcarrier signal amplified and filtered

output signal of N-channel correlator fed by the I-channel subcarrier

signal

7

8

9

A

VCorrNQ

VCorrDI

VCorrDQ

VEvalL

output signal of N-channel correlator fed by the Q-channel subcarrier

signal

output signal of D-channel correlator fed by the I-channel subcarrier

signal

output signal of D-channel correlator fed by the Q-channel subcarrier

signal

evaluation signal from the left half-bit

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Table 161. Analog test signal selection …continued

Value Signal Name Description

B

C

D

E

F

VEvalR

VTemp

evaluation signal from the right half-bit

temperature voltage derived from band gap

reserved for future use

reserved

reserved for future use

15.2.3 Digital test signals

Digital test signals can be routed to pin MFOUT by setting bit SignalToMFOUT = logic 1. A

digital test signal is selected using the TestDigiSelect register TestDigiSignalSel[6:0] bits.

The signals selected by the TestDigiSignalSel[6:0] bits are shown in Table 162.

Table 162. Digital test signal selection

TestDigiSignalSel Signal name Description

[6:0]

F4h

E4h

s_data

s_valid

data received from the card

when logic 1 is returned the s_data and s_coll signals are

valid

D4h

C4h

s_coll

when logic 1 is returned a collision has been detected in the

current bit

s_clock

internal serial clock:

during transmission, this is the encoder clock

during reception this is the receiver clock

B5h

A5h

rd_sync

wr_sync

int_clock

internal synchronized read signal which is derived from the

parallel microprocessor interface

internal synchronized write signal which is derived from the

parallel microprocessor interface

96h

00h

internal 13.56 MHz clock

no test signal output as defined by the MFOUTSelect register

MFOUTSelect[2:0] bits routed to pin MFOUT

If test signals are not used, the TestDigiSelect register address value must be 00h.

Remark: All other values for TestDigiSignalSel[6:0] are for production test purposes only.

15.2.4 Analog and digital test signal Examples

Figure 25 shows a MIFARE card’s answer to a request command using the Q-clock

receiving path. RX reference is given to show the Manchester modulated signal on pin

RX.

The signal is demodulated and amplified in the receiver circuitry. Signal VRXAmpQ is the

amplified side-band signal using the Q-clock for demodulation. The signals VCorrDQ and

VCorrNQ were generated in the correlation circuitry. They are processed further in the

evaluation and digitizer circuitry.

Signals VEvalR and VEvalL show the evaluation of the signal’s right and left half-bit.

Finally, the digital test signal s_data shows the received data. This is then sent to the

internal digital circuit and s_valid which indicates the received data stream is valid.

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RX reference

VRxAmpQ

VCorrDQ

VCorrNQ

VEvalR

VEvalL

s_data

s_valid

50 μs per division

001aak628

Fig 25. ISO/IEC 14443 A receiving path Q-clock

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16. Package outline

SO32: plastic small outline package; 32 leads; body width 7.5 mm

SOT287-1

D

E

A

X

c

y

H

v

M

A

E

Z

17

32

Q

A

2

A

(A )

3

A

1

pin 1 index

θ

L

p

L

16

1

w

M

detail X

b

p

e

0

5

10 mm

scale

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

A

(1)

UNIT

A

b

c

D

E

e

H

E

L

Q

v

w

y

Z

θ

p

1

2

3

max.

0.3

0.1

2.45

2.25

0.49

0.36

0.27 20.7

0.18 20.3

7.6

7.4

10.65

10.00

1.1

0.4

1.2

1.0

0.95

0.55

mm

2.65

0.25

0.01

1.27

0.05

1.4

0.25

0.01

0.25

0.01

0.1

8^o

0^o

0.012 0.096

0.004 0.089

0.02 0.011 0.81

0.01 0.007 0.80

0.30

0.29

0.419

0.394

0.043 0.047

0.016 0.039

0.037

0.022

inches

0.1

0.004

0.055

Note

1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.

REFERENCES

OUTLINE

EUROPEAN

PROJECTION

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

00-08-17

03-02-19

SOT287-1

MO-119

Fig 26. Package outline SOT287-1

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17. Abbreviations

Table 163. Abbreviations and acronyms

Acronym

Description

ASK

CMOS

CRC

EOF

EPP

ETU

FIFO

HBM

LSB

Amplitude-Shift Keying

Complementary Metal-Oxide Semiconductor

Cyclic Redundancy Check

End Of Frame

Enhanced Parallel Port

Elementary Time Unit

First In, First Out

Human Body Model

Least Significant Bit

MM

Machine Model

MSB

NRZ

POR

PCD

PICC

SOF

SPI

Most Significant Bit

None Return to Zero

Power-On Reset

Proximity Coupling Device

Proximity Integrated Circuit Card

Start Of Frame

Serial Peripheral Interface

18. References

[1] Application note — MICORE reader IC family; Directly Matched Antenna Design.

[2] Application note — MIFARE (14443 A) 13.56 MHz RFID Proximity Antennas.

[3] Application note — Directly matched Antenna - Excel calculation.

[4] ISO standard — ISO/IEC 14443 Identification cards - Contactless integrated

circuit(s) cards - Proximity cards, part 1-4.

[5] Application note — MIFARE Implementation of Higher Baud rates.

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19. Revision history

Table 164. Revision history

Document ID

MFRC500_33

Modifications:

Release date

Data sheet status

Change notice

Supersedes

20100315

Product data sheet

-

048032

• The format of this data sheet has been redesigned to comply with the new identity guidelines of

NXP Semiconductors

• Legal texts have been adapted to the new company name where appropriate

• This version supersedes all previous revisions.

• The symbols for electrical characteristics and their parameters have been updated to meet the

NXP Semiconductors’ guidelines

• A number of inconsistencies in pin, register and bit names have been eliminated from the data sheet

• All drawings have been updated

• Section 5 “Quick reference data” on page 3: section added

• Section 15.1.2.4 “Antenna coil” on page 93: added missing formula and updated the last clause

• Section 16 “Package outline” on page 99: updated

• Section 18 “References” on page 100: added section and updated the references in the document

048032

048031

048030

048020

048010

20051201

20040501

20030301

20010131

20040430

Product data sheet

Preliminary data sheet

Objective data sheet

-

048031

048030

048020

048010

-

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048033

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MFRC500

NXP Semiconductors

Highly Integrated ISO/IEC 14443 A Reader IC

20. Legal information

20.1 Data sheet status

Document status^[1][2]

Product status^[3]

Development

Definition

Objective [short] data sheet

This document contains data from the objective specification for product development.

This document contains data from the preliminary specification.

This document contains the product specification.

Preliminary [short] data sheet Qualification

Product [short] data sheet Production

[1]

[2]

[3]

Please consult the most recently issued document before initiating or completing a design.

The term ‘short data sheet’ is explained in section “Definitions”.

The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status

information is available on the Internet at URL http://www.nxp.com.

malfunction of an NXP Semiconductors product can reasonably be expected

20.2 Definitions

to result in personal injury, death or severe property or environmental

damage. NXP Semiconductors accepts no liability for inclusion and/or use of

NXP Semiconductors products in such equipment or applications and

therefore such inclusion and/or use is at the customer’s own risk.

Draft — The document is a draft version only. The content is still under

internal review and subject to formal approval, which may result in

modifications or additions. NXP Semiconductors does not give any

representations or warranties as to the accuracy or completeness of

information included herein and shall have no liability for the consequences of

use of such information.

Applications — Applications that are described herein for any of these

products are for illustrative purposes only. NXP Semiconductors makes no

representation or warranty that such applications will be suitable for the

specified use without further testing or modification.

Short data sheet — A short data sheet is an extract from a full data sheet

with the same product type number(s) and title. A short data sheet is intended

for quick reference only and should not be relied upon to contain detailed and

full information. For detailed and full information see the relevant full data

sheet, which is available on request via the local NXP Semiconductors sales

office. In case of any inconsistency or conflict with the short data sheet, the

full data sheet shall prevail.

NXP Semiconductors does not accept any liability related to any default,

damage, costs or problem which is based on a weakness or default in the

customer application/use or the application/use of customer’s third party

customer(s) (hereinafter both referred to as “Application”). It is customer’s

sole responsibility to check whether the NXP Semiconductors product is

suitable and fit for the Application planned. Customer has to do all necessary

testing for the Application in order to avoid a default of the Application and the

product. NXP Semiconductors does not accept any liability in this respect.

Product specification — The information and data provided in a Product

data sheet shall define the specification of the product as agreed between

NXP Semiconductors and its customer, unless NXP Semiconductors and

customer have explicitly agreed otherwise in writing. In no event however,

shall an agreement be valid in which the NXP Semiconductors product is

deemed to offer functions and qualities beyond those described in the

Product data sheet.

Limiting values — Stress above one or more limiting values (as defined in

the Absolute Maximum Ratings System of IEC 60134) will cause permanent

damage to the device. Limiting values are stress ratings only and (proper)

operation of the device at these or any other conditions above those given in

the Recommended operating conditions section (if present) or the

Characteristics sections of this document is not warranted. Constant or

repeated exposure to limiting values will permanently and irreversibly affect

the quality and reliability of the device.

20.3 Disclaimers

Terms and conditions of commercial sale — NXP Semiconductors

products are sold subject to the general terms and conditions of commercial

sale, as published at http://www.nxp.com/profile/terms, unless otherwise

agreed in a valid written individual agreement. In case an individual

agreement is concluded only the terms and conditions of the respective

agreement shall apply. NXP Semiconductors hereby expressly objects to

applying the customer’s general terms and conditions with regard to the

purchase of NXP Semiconductors products by customer.

Limited warranty and liability — Information in this document is believed to

be accurate and reliable. However, NXP Semiconductors does not give any

representations or warranties, expressed or implied, as to the accuracy or

completeness of such information and shall have no liability for the

consequences of use of such information.

In no event shall NXP Semiconductors be liable for any indirect, incidental,

punitive, special or consequential damages (including - without limitation - lost

profits, lost savings, business interruption, costs related to the removal or

replacement of any products or rework charges) whether or not such

damages are based on tort (including negligence), warranty, breach of

contract or any other legal theory.

No offer to sell or license — Nothing in this document may be interpreted or

construed as an offer to sell products that is open for acceptance or the grant,

conveyance or implication of any license under any copyrights, patents or

other industrial or intellectual property rights.

Notwithstanding any damages that customer might incur for any reason

whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards

customer for the products described herein shall be limited in accordance

with the Terms and conditions of commercial sale of NXP Semiconductors.

Export control — This document as well as the item(s) described herein

may be subject to export control regulations. Export might require a prior

authorization from national authorities.

Quick reference data — The Quick reference data is an extract of the

product data given in the Limiting values and Characteristics sections of this

document, and as such is not complete, exhaustive or legally binding.

Right to make changes — NXP Semiconductors reserves the right to make

changes to information published in this document, including without

limitation specifications and product descriptions, at any time and without

notice. This document supersedes and replaces all information supplied prior

to the publication hereof.

Non-automotive qualified products — Unless this data sheet expressly

states that this specific NXP Semiconductors product is automotive qualified,

the product is not suitable for automotive use. It is neither qualified nor tested

in accordance with automotive testing or application requirements. NXP

Semiconductors accepts no liability for inclusion and/or use of

Suitability for use — NXP Semiconductors products are not designed,

authorized or warranted to be suitable for use in medical, military, aircraft,

space or life support equipment, nor in applications where failure or

non-automotive qualified products in automotive equipment or applications.

MFRC500_33

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Product data sheet

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Rev. 3.3 — 15 March 2010

048033

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MFRC500

NXP Semiconductors

Highly Integrated ISO/IEC 14443 A Reader IC

In the event that customer uses the product for design-in and use in

automotive applications to automotive specifications and standards, customer

(a) shall use the product without NXP Semiconductors’ warranty of the

product for such automotive applications, use and specifications, and (b)

whenever customer uses the product for automotive applications beyond

NXP Semiconductors’ specifications such use shall be solely at customer’s

own risk, and (c) customer fully indemnifies NXP Semiconductors for any

liability, damages or failed product claims resulting from customer design and

use of the product for automotive applications beyond NXP Semiconductors’

standard warranty and NXP Semiconductors’ product specifications.

20.4 Trademarks

Notice: All referenced brands, product names, service names and trademarks

are the property of their respective owners.

MIFARE — is a trademark of NXP B.V.

21. Contact information

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

MFRC500_33

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Product data sheet

PUBLIC

Rev. 3.3 — 15 March 2010

048033

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MFRC500

NXP Semiconductors

Highly Integrated ISO/IEC 14443 A Reader IC

22. Tables

Table 1. Quick reference data . . . . . . . . . . . . . . . . . . . . .3

Table 2. Ordering information . . . . . . . . . . . . . . . . . . . . .3

Table 3. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . .5

Table 4. Supported microprocessor and EPP interface

signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

reset value: x000 0000b, x0h bit allocation . . . 44

Table 36. Command register bit descriptions . . . . . . . . . 44

Table 37. FIFOData register (address: 02h)

reset value: xxxx xxxxb, xxh bit allocation . . . 44

Table 38. FIFOData register bit descriptions . . . . . . . . . 44

Table 39. PrimaryStatus register (address: 03h)

reset value: 0000 0101b, 05h bit allocation . . 45

Table 40. PrimaryStatus register bit descriptions . . . . . . 45

Table 41. FIFOLength register (address: 04h)

reset value: 0000 0000b, 00h bit allocation . . 46

Table 42. FIFOLength bit descriptions . . . . . . . . . . . . . . 46

Table 43. SecondaryStatus register (address: 05h)

reset value: 01100 000b, 60h bit allocation . . . 46

Table 44. SecondaryStatus register bit descriptions . . . . 46

Table 45. InterruptEn register (address: 06h)

Table 5. Connection scheme for detecting the parallel

interface type . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Table 6. EEPROM memory organization diagram . . . . .10

Table 7. Product information field byte allocation . . . . .11

Table 8. Product information field byte description . . . .11

Table 9. Product type identification definition . . . . . . . .11

Table 10. Byte assignment for register initialization at

start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Table 11. Shipment content of StartUp

configuration file . . . . . . . . . . . . . . . . . . . . . . .12

Table 12. Byte assignment for register initialization at

startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

reset value: 0000 0000b, 00h bit allocation . . 47

Table 46. InterruptEn register bit descriptions . . . . . . . . 47

Table 47. InterruptRq register (address: 07h)

reset value: 0000 0000b, 00h bit allocation . . 47

Table 48. InterruptRq register bit descriptions . . . . . . . . 47

Table 49. Control register (address: 09h)

reset value: 0000 0000b, 00h bit allocation . . 48

Table 50. Control register bit descriptions . . . . . . . . . . . 48

Table 51. ErrorFlag register (address: 0Ah)

reset value: 0100 0000b, 40h bit allocation . . 49

Table 52. ErrorFlag register bit descriptions . . . . . . . . . . 49

Table 53. CollPos register (address: 0Bh)

Table 13. FIFO buffer access . . . . . . . . . . . . . . . . . . . . .15

Table 14. Associated FIFO buffer registers and flags . . .16

Table 15. Interrupt sources . . . . . . . . . . . . . . . . . . . . . . .17

Table 16. Interrupt control registers . . . . . . . . . . . . . . . .17

Table 17. Associated Interrupt request system registers

and flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Table 18. Associated timer unit registers and flags . . . . .23

Table 19. Signal on pins during Hard power-down . . . . .23

Table 20. Pin TX1 configurations . . . . . . . . . . . . . . . . . .27

Table 21. Pin TX2 configurations . . . . . . . . . . . . . . . . . .27

Table 22. TX1 and TX2 source resistance of n-channel

driver transistor against

reset value: 0000 0000b, 00h bit allocation . . 50

Table 54. CollPos register bit descriptions . . . . . . . . . . . 50

Table 55. TimerValue register (address: 0Ch)

GsCfgCW or GsCfgMod . . . . . . . . . . . . . . . . .28

Table 23. Gain factors for the internal amplifier . . . . . . . .32

Table 24. DecoderSource[1:0] values . . . . . . . . . . . . . . .34

Table 25. ModulatorSource[1:0] values . . . . . . . . . . . . . .34

Table 26. MFOUTSelect[2:0] values . . . . . . . . . . . . . . . .34

Table 27. Register settings to enable use of the analog

circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Table 28. Dedicated address bus: assembling the

register address . . . . . . . . . . . . . . . . . . . . . . . .37

Table 29. Multiplexed address bus: assembling the

register address . . . . . . . . . . . . . . . . . . . . . . . .37

Table 30. Behavior and designation of register bits . . . . .38

Table 31. MFRC500 register overview . . . . . . . . . . . . . .39

Table 32. MFRC500 register flags overview . . . . . . . . . .41

Table 33. Page register (address: 00h, 08h, 10h, 18h,

20h, 28h, 30h, 38h) reset value: 1000 0000b,

80h bit allocation . . . . . . . . . . . . . . . . . . . . . . .43

Table 34. Page register bit descriptions . . . . . . . . . . . . .43

Table 35. Command register (address: 01h)

reset value: xxxx xxxxb, xxh bit allocation . . . 50

Table 56. TimerValue register bit descriptions . . . . . . . . 50

Table 57. CRCResultLSB register (address: 0Dh)

reset value: xxxx xxxxb, xxh bit allocation . . . 50

Table 58. CRCResultLSB register bit descriptions . . . . . 50

Table 59. CRCResultMSB register (address: 0Eh)

reset value: xxxx xxxxb, xxh bit allocation . . . 51

Table 60. CRCResultMSB register bit descriptions . . . . 51

Table 61. BitFraming register (address: 0Fh)

reset value: 0000 0000b, 00h bit allocation . . 51

Table 62. BitFraming register bit descriptions . . . . . . . . . 51

Table 63. TxControl register (address: 11h)

reset value: 0101 1000b, 58h bit allocation . . 52

Table 64. TxControl register bit descriptions . . . . . . . . . 52

Table 65. CwConductance register (address: 12h)

reset value: 0011 1111b, 3Fh bit allocation . . . 53

Table 66. CwConductance register bit descriptions . . . . 53

Table 67. PreSet13 register (address: 13h)

continued >>

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MFRC500

NXP Semiconductors

Highly Integrated ISO/IEC 14443 A Reader IC

reset value: 0011 1111b, 3Fh bit allocation . . .53

Table 68. PreSet13 register bit descriptions . . . . . . . . . .53

Table 69. PreSet14 register (address: 14h)

reset value: 0001 1001b, 19h bit allocation . . .53

Table 70. PreSet14 register bit descriptions . . . . . . . . . .53

Table 71. ModWidth register (address: 15h)

reset value: 0000 0000b, 00h bit allocation . . 60

Table 102. MFOUTSelect register bit descriptions . . . . . 60

Table 103. PreSet27 (address: 27h) reset value:

xxxx xxxxb, xxh bit allocation . . . . . . . . . . . . . 60

Table 104. PreSet27 register bit descriptions . . . . . . . . . 60

Table 105. FIFOLevel register (address: 29h)

reset value: 0001 0011b, 13h bit allocation . . .54

Table 72. ModWidth register bit descriptions . . . . . . . . . .54

Table 73. PreSet16 register (address: 16h)

reset value: 0000 1000b, 08h bit allocation . . 61

Table 106. FIFOLevel register bit descriptions . . . . . . . . 61

Table 107. TimerClock register (address: 2Ah)

reset value: 0000 0000b, 00h bit allocation . . .54

Table 74. PreSet16 register bit descriptions . . . . . . . . . .54

Table 75. PreSet17 register (address: 17h)

reset value: 0000 0000b, 00h bit allocation . . .54

Table 76. PreSet17 register bit descriptions . . . . . . . . . .54

Table 77. RxControl1 register (address: 19h)

reset value: 0000 0111b, 07h bit allocation . . . 61

Table 108. TimerClock register bit descriptions . . . . . . . . 61

Table 109. TimerControl register (address: 2Bh)

reset value: 0000 0110b, 06h bit allocation . . . 62

Table 110. TimerControl register bit descriptions . . . . . . . 62

Table 111. TimerReload register (address: 2Ch)

reset value: 0111 0011b, 73h bit allocation . . .55

Table 78. RxControl1 register bit descriptions . . . . . . . . .55

Table 79. DecoderControl register (address: 1Ah)

reset value: 0000 1000b, 08h bit allocation . . .55

Table 80. DecoderControl register bit descriptions . . . . .55

Table 81. BitPhase register (address: 1Bh) reset value:

1010 1101b, ADh bit allocation . . . . . . . . . . . .56

Table 82. BitPhase register bit descriptions . . . . . . . . . .56

Table 83. RxThreshold register (address: 1Ch)

reset value: 1111 1111b, FFh bit allocation . . .56

Table 84. RxThreshold register bit descriptions . . . . . . .56

Table 85. PreSet1D register (address: 1Dh)

reset value: 0000 0000b, 00h bit allocation . . .56

Table 86. PreSet1D register bit descriptions . . . . . . . . . .56

Table 87. RxControl2 register (address: 1Eh)

reset value: 0100 0001b, 41h bit allocation . . .57

Table 88. RxControl2 register bit descriptions . . . . . . . . .57

Table 89. ClockQControl register (address: 1Fh)

reset value: 000x xxxxb, xxh bit allocation . . . .57

Table 90. ClockQControl register bit descriptions . . . . . .57

Table 91. RxWait register (address: 21h) reset value:

0000 0101b, 06h bit allocation . . . . . . . . . . . . .58

Table 92. RxWait register bit descriptions . . . . . . . . . . . .58

Table 93. ChannelRedundancy register (address: 22h)

reset value: 0000 0011b, 03h bit allocation . . .58

Table 94. ChannelRedundancy bit descriptions . . . . . . .58

Table 95. CRCPresetLSB register (address: 23h)

reset value: 0101 0011b, 63h bit allocation . . .59

Table 96. CRCPresetLSB register bit descriptions . . . . .59

Table 97. CRCPresetMSB register (address: 24h)

reset value: 0101 0011b, 63h bit allocation . . .59

Table 98. CRCPresetMSB bit descriptions . . . . . . . . . . .59

Table 99. PreSet25 register (address: 25h)

reset value: 0000 1010b, 0Ah bit allocation . . 62

Table 112. TimerReload register bit descriptions . . . . . . . 62

Table 113. IRQPinConfig register (address: 2Dh)

reset value: 0000 0010b, 02h bit allocation . . 63

Table 114. IRQPinConfig register bit descriptions . . . . . . 63

Table 115. PreSet2E register (address: 2Eh)

reset value: xxxx xxxxb, xxh bit allocation . . . 63

Table 116. PreSet2F register (address: 2Fh)

reset value: xxxx xxxxb, xxh bit allocation . . . 63

Table 117. Reserved registers (address: 31h, 32h, 33h,

34h, 35h, 36h, 37h) reset value: xxxx xxxxb,

xxh bit allocation . . . . . . . . . . . . . . . . . . . . . . . 63

Table 118. Reserved register (address: 39h)

reset value: xxxx xxxxb, xxh bit allocation . . . 64

Table 119. TestAnaSelect register (address: 3Ah)

reset value: 0000 0000b, 00h bit allocation . . 64

Table 120. TestAnaSelect bit descriptions . . . . . . . . . . . . 64

Table 121. Reserved register (address: 3Bh)

reset value: xxxx xxxxb, xxh bit allocation . . . 65

Table 122. Reserved register (address: 3Ch)

reset value: xxxx xxxxb, xxh bit allocation . . . 65

Table 123. TestDigiSelect register (address: 3Dh)

reset value: xxxx xxxxb, xxh bit allocation . . . 65

Table 124. TestDigiSelect register bit descriptions . . . . . 65

Table 125. Reserved register (address: 3Eh, 3Fh)

reset value: xxxx xxxxb, xxh bit allocation . . . 66

Table 126. MFRC500 commands overview . . . . . . . . . . . 66

Table 127. StartUp command 3Fh . . . . . . . . . . . . . . . . . . 68

Table 128. Idle command 00h . . . . . . . . . . . . . . . . . . . . . 68

Table 129. Transmit command 1Ah . . . . . . . . . . . . . . . . . 69

Table 130. Transmission of frames of more than

64 bytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Table 131. Receive command 16h . . . . . . . . . . . . . . . . . 72

Table 132. Return values for bit-collision positions . . . . . 74

Table 133. Communication error table . . . . . . . . . . . . . . . 75

Table 134. Transceive command 1Eh . . . . . . . . . . . . . . . 75

reset value: 0000 0000b, 00h bit allocation . . .59

Table 100. PreSet25 register bit descriptions . . . . . . . . . .60

Table 101. MFOUTSelect register (address: 26h)

continued >>

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NXP Semiconductors

Highly Integrated ISO/IEC 14443 A Reader IC

Table 135. Meaning of ModemState . . . . . . . . . . . . . . . . .75

Table 136. WriteE2 command 01h . . . . . . . . . . . . . . . . . .77

Table 137. ReadE2 command 03h . . . . . . . . . . . . . . . . . .79

Table 138. LoadConfig command 07h . . . . . . . . . . . . . . .79

Table 139. CalcCRC command 12h . . . . . . . . . . . . . . . . .80

Table 140. CRC coprocessor parameters . . . . . . . . . . . .80

Table 141. ErrorFlag register error flags overview . . . . . .81

Table 142. LoadKeyE2 command 0Bh . . . . . . . . . . . . . . .81

Table 143. LoadKey command 19h . . . . . . . . . . . . . . . . .81

Table 144. Authent1 command 0Ch . . . . . . . . . . . . . . . . .82

Table 145. Authent2 command 14h . . . . . . . . . . . . . . . . .82

Table 146. Limiting values. . . . . . . . . . . . . . . . . . . . . . . . .83

Table 147. Operating condition range . . . . . . . . . . . . . . . .83

Table 148. Current consumption . . . . . . . . . . . . . . . . . . . .84

Table 149. Standard input pin characteristics . . . . . . . . . .84

Table 150. Schmitt trigger input pin characteristics . . . . .84

Table 151. RSTPD input pin characteristics . . . . . . . . . . .85

Table 152. RX input capacitance and input voltage

range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

Table 153. Digital output pin characteristics . . . . . . . . . . .85

Table 154. Antenna driver output pin characteristics . . . .86

Table 155. Timing specification for separate read/write

strobe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

Table 156. Common read/write strobe timing

specification . . . . . . . . . . . . . . . . . . . . . . . . . . .87

Table 157. Common read/write strobe timing

specification for EPP . . . . . . . . . . . . . . . . . . . .88

Table 158. Clock frequency . . . . . . . . . . . . . . . . . . . . . . .90

Table 159. EEPROM characteristics . . . . . . . . . . . . . . . .90

Table 160. Signal routed to pin MFOUT . . . . . . . . . . . . . .94

Table 161. Analog test signal selection . . . . . . . . . . . . . .96

Table 162. Digital test signal selection . . . . . . . . . . . . . . .97

Table 163. Abbreviations and acronyms . . . . . . . . . . . . .100

Table 164. Revision history . . . . . . . . . . . . . . . . . . . . . . .101

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Product data sheet

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NXP Semiconductors

Highly Integrated ISO/IEC 14443 A Reader IC

23. Figures

Fig 1. MFRC500 block diagram. . . . . . . . . . . . . . . . . . . .4

Fig 2. MFRC500 pin configuration. . . . . . . . . . . . . . . . . .5

Fig 3. Connection to microprocessor: separate

read and write strobes . . . . . . . . . . . . . . . . . . . . . .8

Fig 4. Connection to microprocessor: common

read and write strobes . . . . . . . . . . . . . . . . . . . . . .9

Fig 5. Connection to microprocessor: EPP common

read/write strobes and handshake. . . . . . . . . . . . .9

Fig 6. Key storage format . . . . . . . . . . . . . . . . . . . . . . .14

Fig 7. Timer module block diagram . . . . . . . . . . . . . . . .20

Fig 8. The StartUp procedure. . . . . . . . . . . . . . . . . . . . .25

Fig 9. Quartz clock connection . . . . . . . . . . . . . . . . . . .26

Fig 10. Receiver circuit block diagram. . . . . . . . . . . . . . .30

Fig 11. Automatic Q-clock calibration . . . . . . . . . . . . . . .31

Fig 12. Serial signal switch block diagram. . . . . . . . . . . .33

Fig 13. Crypto1 key handling block diagram . . . . . . . . . .36

Fig 14. Transmitting bit oriented frames . . . . . . . . . . . . .70

Fig 15. Timing for transmitting byte oriented frames . . . .71

Fig 16. Timing for transmitting bit oriented frames. . . . . .71

Fig 17. Card communication state diagram . . . . . . . . . . .76

Fig 18. EEPROM programming timing diagram. . . . . . . .78

Fig 19. Separate read/write strobe timing diagram . . . . .87

Fig 20. Common read/write strobe timing diagram . . . . .88

Fig 21. Timing diagram for common read/write strobe;

EPP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

Fig 22. Application example circuit diagram: directly

matched antenna. . . . . . . . . . . . . . . . . . . . . . . . .91

Fig 23. TX control signals . . . . . . . . . . . . . . . . . . . . . . . .95

Fig 24. RX control signals . . . . . . . . . . . . . . . . . . . . . . . .96

Fig 25. ISO/IEC 14443 A receiving path Q-clock. . . . . . .98

Fig 26. Package outline SOT287-1 . . . . . . . . . . . . . . . . .99

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Product data sheet

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Highly Integrated ISO/IEC 14443 A Reader IC

24. Contents

1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

9.4.4

9.5

9.5.1

Register overview interrupt request system. . 18

Timer unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Timer unit implementation . . . . . . . . . . . . . . . 19

Timer unit block diagram . . . . . . . . . . . . . . . . 19

Controlling the timer unit . . . . . . . . . . . . . . . . 20

Timer unit clock and period . . . . . . . . . . . . . . 21

Timer unit status. . . . . . . . . . . . . . . . . . . . . . . 21

Using the timer unit functions. . . . . . . . . . . . . 22

Time-out and WatchDog counters . . . . . . . . . 22

Stopwatch . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Programmable one shot timer and

2

General description. . . . . . . . . . . . . . . . . . . . . . 1

Features and benefits . . . . . . . . . . . . . . . . . . . . 2

General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Quick reference data . . . . . . . . . . . . . . . . . . . . . 3

Ordering information. . . . . . . . . . . . . . . . . . . . . 3

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Pinning information. . . . . . . . . . . . . . . . . . . . . . 5

Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5

3

3.1

4

9.5.1.1

9.5.1.2

9.5.1.3

9.5.1.4

9.5.2

9.5.2.1

9.5.2.2

9.5.2.3

5

6

7

8

8.1

periodic trigger . . . . . . . . . . . . . . . . . . . . . . . . 22

Timer unit registers . . . . . . . . . . . . . . . . . . . . 23

Power reduction modes . . . . . . . . . . . . . . . . . 23

Hard power-down. . . . . . . . . . . . . . . . . . . . . . 23

Soft power-down mode . . . . . . . . . . . . . . . . . 24

Standby mode . . . . . . . . . . . . . . . . . . . . . . . . 24

Automatic receiver power-down. . . . . . . . . . . 24

StartUp phase . . . . . . . . . . . . . . . . . . . . . . . . 25

Hard power-down phase . . . . . . . . . . . . . . . . 25

Reset phase. . . . . . . . . . . . . . . . . . . . . . . . . . 25

Initialization phase . . . . . . . . . . . . . . . . . . . . . 25

Initializing the parallel interface type . . . . . . . 25

Oscillator circuit . . . . . . . . . . . . . . . . . . . . . . . 26

Transmitter pins TX1 and TX2 . . . . . . . . . . . . 27

Configuring pins TX1 and TX2. . . . . . . . . . . . 27

Antenna operating distance versus power

consumption. . . . . . . . . . . . . . . . . . . . . . . . . . 28

Antenna driver output source resistance . . . . 28

Source resistance table . . . . . . . . . . . . . . . . . 28

Calculating the relative source resistance . . . 29

Calculating the effective source resistance . . 29

Pulse width. . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Receiver circuit . . . . . . . . . . . . . . . . . . . . . . . 30

Receiver circuit block diagram. . . . . . . . . . . . 30

Receiver operation. . . . . . . . . . . . . . . . . . . . . 31

9

9.1

9.1.1

Functional description . . . . . . . . . . . . . . . . . . . 7

Digital interface. . . . . . . . . . . . . . . . . . . . . . . . . 7

Overview of supported microprocessor

interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Automatic microprocessor interface

detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Connection to different microprocessor

types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Separate read and write strobe . . . . . . . . . . . . 8

Common read and write strobe . . . . . . . . . . . . 9

Common read and write strobe: EPP with

handshake . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Memory organization of the EEPROM . . . . . . 10

Product information field (read only). . . . . . . . 11

Register initialization files (read/write) . . . . . . 11

StartUp register initialization file

9.5.3

9.6

9.6.1

9.6.2

9.6.3

9.6.4

9.7

9.7.1

9.7.2

9.7.3

9.7.4

9.8

9.1.2

9.1.3

9.1.3.1

9.1.3.2

9.1.3.3

9.2

9.9

9.9.1

9.9.2

9.2.1

9.2.2

9.2.2.1

(read/write) . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Factory default StartUp register

9.9.3

9.2.2.2

9.9.3.1

9.9.3.2

9.9.3.3

9.9.4

9.10

9.10.1

9.10.2

initialization file . . . . . . . . . . . . . . . . . . . . . . . . 12

Register initialization file (read/write) . . . . . . . 13

Crypto1 keys (write only) . . . . . . . . . . . . . . . . 13

Key format . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Storage of keys in the EEPROM . . . . . . . . . . 14

FIFO buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Accessing the FIFO buffer . . . . . . . . . . . . . . . 14

Access rules . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Controlling the FIFO buffer . . . . . . . . . . . . . . . 15

FIFO buffer status information . . . . . . . . . . . . 15

FIFO buffer registers and flags. . . . . . . . . . . . 16

Interrupt request system. . . . . . . . . . . . . . . . . 16

Interrupt sources overview . . . . . . . . . . . . . . . 16

Interrupt request handling. . . . . . . . . . . . . . . . 17

Controlling interrupts and getting their

9.2.2.3

9.2.3

9.2.3.1

9.2.3.2

9.3

9.3.1

9.3.1.1

9.3.2

9.3.3

9.3.4

9.4

9.10.2.1 Automatic Q-clock calibration . . . . . . . . . . . . 31

9.10.2.2 Amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

9.10.2.3 Correlation circuitry . . . . . . . . . . . . . . . . . . . . 32

9.10.2.4 Evaluation and digitizer circuitry . . . . . . . . . . 32

9.11

9.11.1

9.11.2

Serial signal switch . . . . . . . . . . . . . . . . . . . . 33

Serial signal switch block diagram. . . . . . . . . 33

Serial signal switch registers . . . . . . . . . . . . . 34

9.4.1

9.4.2

9.4.2.1

9.11.2.1 Active antenna concept . . . . . . . . . . . . . . . . . 35

9.11.2.2 Driving both RF parts . . . . . . . . . . . . . . . . . . . 35

status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Accessing the interrupt registers . . . . . . . . . . 17

Configuration of pin IRQ. . . . . . . . . . . . . . . . . 18

9.12

9.12.1

9.12.2

MIFARE authentication and Crypto1 . . . . . . . 35

Crypto1 key handling . . . . . . . . . . . . . . . . . . . 36

Authentication procedure. . . . . . . . . . . . . . . . 36

9.4.2.2

9.4.3

continued >>

MFRC500_33

All information provided in this document is subject to legal disclaimers.

Product data sheet

PUBLIC

Rev. 3.3 — 15 March 2010

048033

108 of 110

MFRC500

NXP Semiconductors

Highly Integrated ISO/IEC 14443 A Reader IC

10

10.1

10.1.1

10.1.2

10.1.3

10.2

10.3

10.4

10.5

10.5.1

MFRC500 registers . . . . . . . . . . . . . . . . . . . . . 37

10.5.5.5 CRCPresetMSB register . . . . . . . . . . . . . . . . 59

10.5.5.6 PreSet25 register. . . . . . . . . . . . . . . . . . . . . . 59

10.5.5.7 MFOUTSelect register . . . . . . . . . . . . . . . . . . 60

10.5.5.8 PreSet27 register. . . . . . . . . . . . . . . . . . . . . . 60

Register addressing modes . . . . . . . . . . . . . . 37

Page registers . . . . . . . . . . . . . . . . . . . . . . . . 37

Dedicated address bus. . . . . . . . . . . . . . . . . . 37

Multiplexed address bus. . . . . . . . . . . . . . . . . 37

Register bit behavior. . . . . . . . . . . . . . . . . . . . 38

Register overview. . . . . . . . . . . . . . . . . . . . . . 39

MFRC500 register flags overview. . . . . . . . . . 41

Register descriptions . . . . . . . . . . . . . . . . . . . 43

Page 0: Command and status . . . . . . . . . . . . 43

10.5.6

Page 5: FIFO, timer and IRQ pin

configuration . . . . . . . . . . . . . . . . . . . . . . . . . 61

10.5.6.1 Page register . . . . . . . . . . . . . . . . . . . . . . . . . 61

10.5.6.2 FIFOLevel register . . . . . . . . . . . . . . . . . . . . . 61

10.5.6.3 TimerClock register . . . . . . . . . . . . . . . . . . . . 61

10.5.6.4 TimerControl register . . . . . . . . . . . . . . . . . . . 62

10.5.6.5 TimerReload register . . . . . . . . . . . . . . . . . . . 62

10.5.6.6 IRQPinConfig register . . . . . . . . . . . . . . . . . . 63

10.5.6.7 PreSet2E register. . . . . . . . . . . . . . . . . . . . . . 63

10.5.6.8 PreSet2F register. . . . . . . . . . . . . . . . . . . . . . 63

10.5.1.1 Page register . . . . . . . . . . . . . . . . . . . . . . . . . 43

10.5.1.2 Command register . . . . . . . . . . . . . . . . . . . . . 44

10.5.1.3 FIFOData register. . . . . . . . . . . . . . . . . . . . . . 44

10.5.1.4 PrimaryStatus register . . . . . . . . . . . . . . . . . . 45

10.5.1.5 FIFOLength register . . . . . . . . . . . . . . . . . . . . 46

10.5.1.6 SecondaryStatus register . . . . . . . . . . . . . . . . 46

10.5.1.7 InterruptEn register. . . . . . . . . . . . . . . . . . . . . 47

10.5.1.8 InterruptRq register. . . . . . . . . . . . . . . . . . . . . 47

10.5.7

Page 6: reserved . . . . . . . . . . . . . . . . . . . . . . 63

10.5.7.1 Page register . . . . . . . . . . . . . . . . . . . . . . . . . 63

10.5.7.2 Reserved registers 31h, 32h, 33h, 34h,

35h, 36h and 37h. . . . . . . . . . . . . . . . . . . . . . 63

10.5.8

Page 7: Test control . . . . . . . . . . . . . . . . . . . . 64

10.5.2

Page 1: Control and status . . . . . . . . . . . . . . . 48

10.5.8.1 Page register . . . . . . . . . . . . . . . . . . . . . . . . . 64

10.5.8.2 Reserved register 39h . . . . . . . . . . . . . . . . . . 64

10.5.8.3 TestAnaSelect register. . . . . . . . . . . . . . . . . . 64

10.5.8.4 Reserved register 3Bh . . . . . . . . . . . . . . . . . . 65

10.5.8.5 Reserved register 3Ch. . . . . . . . . . . . . . . . . . 65

10.5.8.6 TestDigiSelect register . . . . . . . . . . . . . . . . . . 65

10.5.8.7 Reserved registers 3Eh, 3Fh . . . . . . . . . . . . . 66

10.5.2.1 Page register . . . . . . . . . . . . . . . . . . . . . . . . . 48

10.5.2.2 Control register. . . . . . . . . . . . . . . . . . . . . . . . 48

10.5.2.3 ErrorFlag register . . . . . . . . . . . . . . . . . . . . . . 49

10.5.2.4 CollPos register . . . . . . . . . . . . . . . . . . . . . . . 50

10.5.2.5 TimerValue register. . . . . . . . . . . . . . . . . . . . . 50

10.5.2.6 CRCResultLSB register . . . . . . . . . . . . . . . . . 50

10.5.2.7 CRCResultMSB register. . . . . . . . . . . . . . . . . 51

10.5.2.8 BitFraming register . . . . . . . . . . . . . . . . . . . . . 51

11

11.1

11.1.1

11.1.2

11.1.3

11.2

MFRC500 command set . . . . . . . . . . . . . . . . . 66

MFRC500 command overview. . . . . . . . . . . . 66

Basic states . . . . . . . . . . . . . . . . . . . . . . . . . . 68

StartUp command 3Fh. . . . . . . . . . . . . . . . . . 68

Idle command 00h . . . . . . . . . . . . . . . . . . . . . 68

Commands for card communication . . . . . . . 69

Transmit command 1Ah. . . . . . . . . . . . . . . . . 69

10.5.3

Page 2: Transmitter and control . . . . . . . . . . . 52

10.5.3.1 Page register . . . . . . . . . . . . . . . . . . . . . . . . . 52

10.5.3.2 TxControl register. . . . . . . . . . . . . . . . . . . . . . 52

10.5.3.3 CwConductance register . . . . . . . . . . . . . . . . 53

10.5.3.4 PreSet13 register . . . . . . . . . . . . . . . . . . . . . . 53

10.5.3.5 PreSet14 register . . . . . . . . . . . . . . . . . . . . . . 53

10.5.3.6 ModWidth register. . . . . . . . . . . . . . . . . . . . . . 54

10.5.3.7 PreSet16 register . . . . . . . . . . . . . . . . . . . . . . 54

10.5.3.8 PreSet17 register . . . . . . . . . . . . . . . . . . . . . . 54

11.2.1

11.2.1.1 Using the Transmit command . . . . . . . . . . . . 69

11.2.1.2 RF channel redundancy and framing. . . . . . . 70

11.2.1.3 Transmission of bit oriented frames. . . . . . . . 70

11.2.1.4 Transmission of frames with more than

10.5.4

Page 3: Receiver and decoder control . . . . . . 55

10.5.4.1 Page register . . . . . . . . . . . . . . . . . . . . . . . . . 55

10.5.4.2 RxControl1 register. . . . . . . . . . . . . . . . . . . . . 55

10.5.4.3 DecoderControl register . . . . . . . . . . . . . . . . . 55

10.5.4.4 BitPhase register . . . . . . . . . . . . . . . . . . . . . . 56

10.5.4.5 RxThreshold register . . . . . . . . . . . . . . . . . . . 56

10.5.4.6 PreSet1D Register . . . . . . . . . . . . . . . . . . . . . 56

10.5.4.7 RxControl2 register. . . . . . . . . . . . . . . . . . . . . 57

10.5.4.8 ClockQControl register . . . . . . . . . . . . . . . . . . 57

64 bytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Receive command 16h . . . . . . . . . . . . . . . . . 72

11.2.2

11.2.2.1 Using the Receive command. . . . . . . . . . . . . 72

11.2.2.2 RF channel redundancy and framing. . . . . . . 73

11.2.2.3 Collision detection . . . . . . . . . . . . . . . . . . . . . 73

11.2.2.4 Receiving bit oriented frames . . . . . . . . . . . . 74

11.2.2.5 Communication errors . . . . . . . . . . . . . . . . . . 74

11.2.3

11.2.4

11.2.5

11.3

Transceive command 1Eh . . . . . . . . . . . . . . . 75

Card communication states . . . . . . . . . . . . . . 75

Card communication state diagram . . . . . . . . 76

EEPROM commands. . . . . . . . . . . . . . . . . . . 77

WriteE2 command 01h . . . . . . . . . . . . . . . . . 77

10.5.5

Page 4: RF Timing and channel

redundancy. . . . . . . . . . . . . . . . . . . . . . . . . . . 58

10.5.5.1 Page register . . . . . . . . . . . . . . . . . . . . . . . . . 58

10.5.5.2 RxWait register . . . . . . . . . . . . . . . . . . . . . . . . 58

10.5.5.3 ChannelRedundancy register . . . . . . . . . . . . . 58

10.5.5.4 CRCPresetLSB register . . . . . . . . . . . . . . . . . 59

11.3.1

11.3.1.1 Programming process . . . . . . . . . . . . . . . . . . 77

continued >>

MFRC500_33

All information provided in this document is subject to legal disclaimers.

Product data sheet

PUBLIC

Rev. 3.3 — 15 March 2010

048033

109 of 110

MFRC500

NXP Semiconductors

Highly Integrated ISO/IEC 14443 A Reader IC

11.3.1.2 Timing diagram. . . . . . . . . . . . . . . . . . . . . . . . 78

11.3.1.3 WriteE2 command error flags. . . . . . . . . . . . . 78

16

17

18

19

Package outline. . . . . . . . . . . . . . . . . . . . . . . . 99

Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . 100

References. . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Revision history . . . . . . . . . . . . . . . . . . . . . . 101

11.3.2

ReadE2 command 03h. . . . . . . . . . . . . . . . . . 79

11.3.2.1 ReadE2 command error flags. . . . . . . . . . . . . 79

11.4

11.4.1

Diverse commands. . . . . . . . . . . . . . . . . . . . . 79

LoadConfig command 07h . . . . . . . . . . . . . . . 79

20

Legal information . . . . . . . . . . . . . . . . . . . . . 102

Data sheet status . . . . . . . . . . . . . . . . . . . . . 102

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . 102

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . 103

20.1

20.2

20.3

20.4

11.4.1.1 Register assignment. . . . . . . . . . . . . . . . . . . . 79

11.4.1.2 Relevant LoadConfig command error flags . . 80

11.4.2

CalcCRC command 12h. . . . . . . . . . . . . . . . . 80

11.4.2.1 CRC coprocessor settings . . . . . . . . . . . . . . . 80

11.4.2.2 CRC coprocessor status flags . . . . . . . . . . . . 80

21

22

23

24

Contact information . . . . . . . . . . . . . . . . . . . 103

Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

11.5

11.6

11.6.1

Error handling during command execution. . . 81

MIFARE security commands . . . . . . . . . . . . . 81

LoadKeyE2 command 0Bh. . . . . . . . . . . . . . . 81

11.6.1.1 Relevant LoadKeyE2 command error flags . . 81

11.6.2 LoadKey command 19h . . . . . . . . . . . . . . . . . 81

11.6.2.1 Relevant LoadKey command error flags . . . . 82

11.6.3

11.6.4

Authent1 command 0Ch. . . . . . . . . . . . . . . . . 82

Authent2 command 14h . . . . . . . . . . . . . . . . . 82

11.6.4.1 Authent2 command effects. . . . . . . . . . . . . . . 83

12

Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 83

13

13.1

13.2

13.3

13.3.1

13.3.2

13.3.3

13.4

13.4.1

13.4.2

13.4.3

13.4.4

Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . 83

Operating condition range . . . . . . . . . . . . . . . 83

Current consumption . . . . . . . . . . . . . . . . . . . 84

Pin characteristics . . . . . . . . . . . . . . . . . . . . . 84

Input pin characteristics . . . . . . . . . . . . . . . . . 84

Digital output pin characteristics. . . . . . . . . . . 85

Antenna driver output pin characteristics . . . . 86

AC electrical characteristics . . . . . . . . . . . . . . 86

Separate read/write strobe bus timing . . . . . . 86

Common read/write strobe bus timing . . . . . . 87

EPP bus timing. . . . . . . . . . . . . . . . . . . . . . . . 88

Clock frequency . . . . . . . . . . . . . . . . . . . . . . . 90

14

EEPROM characteristics. . . . . . . . . . . . . . . . . 90

15

15.1

15.1.1

15.1.2

Application information. . . . . . . . . . . . . . . . . . 91

Typical application . . . . . . . . . . . . . . . . . . . . . 91

Circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . 91

Circuit description. . . . . . . . . . . . . . . . . . . . . . 91

15.1.2.1 EMC low-pass filter. . . . . . . . . . . . . . . . . . . . . 91

15.1.2.2 Antenna matching. . . . . . . . . . . . . . . . . . . . . . 92

15.1.2.3 Receiver circuit. . . . . . . . . . . . . . . . . . . . . . . . 92

15.1.2.4 Antenna coil . . . . . . . . . . . . . . . . . . . . . . . . . . 93

15.2

15.2.1

Test signals. . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Measurements using the serial signal

switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

15.2.1.1 TX control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

15.2.1.2 RX control. . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

15.2.2

15.2.3

15.2.4

Analog test signals . . . . . . . . . . . . . . . . . . . . . 96

Digital test signals. . . . . . . . . . . . . . . . . . . . . . 97

Analog and digital test signal Examples . . . . . 97

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section ‘Legal information’.

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Date of release: 15 March 2010

048033


型号：	MFRC50001T/0FE,112
厂家：	NXP
描述：	MFRC50001T - The “Original” MIFARE reader solution SOP 32-Pin
文件：	总110页 (文件大小：783K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MFRC50001T/0FE,112 [NXP]

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MFRC52201HN1,157

MFRC52201HN1/TRAYB

MFRC52201HN1/TRAYBM

MFRC52202HN1,151

MFRC52202HN1,157

MFRC52202HN1/TRAYB

MFRC52202HN1/TRAYBM