NCN6000DTB [ONSEMI]
Compact Smart Card Interface IC; 小巧的智能卡接口IC型号: | NCN6000DTB |
厂家: | ONSEMI |
描述: | Compact Smart Card Interface IC |
文件: | 总36页 (文件大小:362K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
NCN6000
Compact Smart Card
Interface IC
The NCN6000 is an integrated circuit dedicated to the smart card
interface applications. The device handles any type of smart card
through a simple and flexible microcontroller interface. On top of that,
due to the built−in chip select pin, several couplers can be connected in
parallel. The device is particularly suited for low cost, low power
applications, with high extended battery life coming from extremely
low quiescent current.
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MARKING
DIAGRAM
Features
20
• 100% Compatible with ISO7816−3 and EMV Standard
• Wide Battery Supply Voltage Range: 2.7 v Vbat v 6.0 V
• Programmable CRD_VCC Supply to Cope with either 3.0 V or 5.0 V
Card Operation
NCN
6000
ALYWG
G
TSSOP−20
DTB SUFFIX
CASE 948E
1
1
• Built−in DC−DC Converter Generates the CRD_VCC Supply with a
Single External Low Cost Inductor only, providing a High Efficiency
Power Conversion
• Full Control of the Power Up/Down Sequence Yields High Signal
Integrity on both the Card I/O and the Signal Lines
A
L
Y
W
G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
• Programmable Card Clock Generator
PIN CONNECTIONS
• Built−in Chip Select Logic allows Parallel Coupling Operation
• ESD Protection on Card Pins (8.0 kV, Human Body Model)
A0
A1
1
V
L
20
19
bat
• Fault Monitoring includes Vbat and Vcc
providing Logic
H
L
2
3
4
5
6
out_
out_
low
low,
Feedback to External CPU
PGM
L
18
• Card Detection Programmable to Handle Positive or Negative
Going Input
• Built−in Programmable CRD_CLK Stop Function Handles both
High or Low State
PWR_ON
STATUS
CS
17 PWR_GND
GROUND
16
15
14
13
CRD_V
CC
RESET
I/O
CRD_IO
7
8
• These are Pb−Free Devices**
CRD_CLK
Typical Application
• E−Commerce Interface
• ATM Smart Card
• Pay TV System
INT
9
12 CRD_RST
CRD_DET
CLOCK_IN
10
11
(Top View)
ORDERING INFORMATION
†
Device
Package
TSSOP−20*
TSSOP−20*
Shipping
NCN6000DTB
NCN6000DTBG
NCN6000DTBR2
75 Units / Rail
75 Units / Rail
ISO/EMV
NCN6000
MICRO
TSSOP−20* 2500/Tape & Reel
SMART CARD
CONTROLLER
INTERFACE
NCN6000DTBR2G TSSOP−20* 2500/Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
*This package is inherently Pb−Free.
Figure 1. Simplified Application
**For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting
Techniques Reference Manual, SOLDERRM/D.
©
Semiconductor Components Industries, LLC, 2006
1
Publication Order Number:
March, 2006 − Rev. 4
NCN6000/D
NCN6000
+5 V
V
C1
10 ꢀ F
CC
U1
1
2
3
4
5
6
7
8
9
20
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
IRQ
A0
V
bat
GND
L1
19
18
17
16
15
14
13
12
A1
L
out_H
22 ꢀ H
L
PGM
PWR_ON
STATUS
CS
out_L
PWR_GND
GROUND
C2
C3
10 ꢀ F
GND
GND
GND
100 nF
CRD_V
CC
CRD_IO
CRD_CLK
CRD_RST
17
RESET
I/O
Swa
GND
18
8
Swb
C8
INT
10
11
4
CLOCK_IN CRD_DET
XTAL
C4
3
NCN6000
MCU GND
CLK
RST
2
1
GND
V
CC
5
GND
GND
I/O
7
VPP
J1
SMARTCARD
Figure 2. Typical Application
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2
NCN6000
+V
bat
V
+
−
20
11
bat
V
bat_OK
2.0 V
50 k
V
bat
INT
9
500 k
GND
CRD_DET
50 ꢀ s
Delay
Q
S
R
GND
CARD DETECTION
+V
bat
POLARITY
PROGRAMMABLE
STATUS INT
50 k
CS
6
CLK STOP
V
CC
F
CLOCK
out
3
2
PGM
A1
DC−DC CONVERTER
3 V / 5 V
DATA
SELECT
15
19
18
17
CRD_V
CC
DECODER
1:16
L
out_H
A0
1
Set_V
CC
Power Down
L
out_L
1/1
1/2
Active Pwr_Down
10
CLOCK_IN
GND
ON/OFF
PWR_GND
CLOCK
DIVIDER
1/4
1/8
FAULT
STATUS INT
16 GROUND
DC−DC STATUS
ENABLE V
GND
CARD STATUS
LOGIC & CARD PINS SEQUENCER
CC
4
5
V
PWR_ON
STATUS
CC
V
bat
V
bat
V
bat_OK
50 k
CLOCK
CLK_STOP
CRD_CLK
13
CLOCK
SEQ 2
SEQ 1
2
A
V
bat
1
GND
V
20 k
20 k
bat_OK
I/O
I/O
CRD_IO
14
I/O
8
7
DATA
DATA
V
bat
1
2
3
RESET
CRD_RST
12
RESET
SEQ 3
PWR_ON
Figure 3. Block Diagram
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3
NCN6000
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4
NCN6000
The programming can be achieved with the card powered
by the table in Figure 4. During the programming mode, the
PGM pin can be released to High since the mode is internally
latched by the Negative going transition presents on the Chip
Select pin.
ON or OFF. The identification of the interrupt is carried out
by polling the STATUS pin, the Vbat voltage and the
DC−DC results being provided on the same pin as depicted
INTERRUPT
ACKNOWLEDGE
CARD IDENTIFICATION
POLLING
CARD EXTRACTED
50 ꢀ s
50 ꢀ s
CRD_DET
INT
CS
PGM
High
A0
A1
Low
Low
STATUS
S1 CLEAR INTERRUPT
S2 CARD PRESENT: STATUS = 1
S3 CLEAR INTERRUPT
S4 CARD PRESENT: STATUS = 0
Figure 5. Interrupt Servicing and Card Polling
When a card is either inserted or extracted, the CRD_DET
pin signal is debounced internally prior to pull the INT pin
to Low. The built−in logic circuit automatically
accommodates positive or negative input signal slope, on
both insertion and extraction state, depending upon the
polarity defined during the initialization sequence. The
default condition is Normally Open switch, negative going
card detection. The external CPU shall acknowledge the
request by forcing CS = L which, in turn, releases the INT
pin to High upon positive going of Chip Select (Table 4).
Polling the STATUS pin as depicted in Table 3 identifies the
active card. If a card is present, the STATUS returns High,
otherwise a Low is presented pin 5. The 50 ꢀ s digital filter
is activated during both Insertion and Extraction of the card.
The MPU shall clear the INT line when the card has been
extracted, making the interrupt function available for other
purposes. However, neither the NCN6000 operation nor the
smart card I/O line or commands are affected by the state of
the INT pin.
On the other hand, clearing the INT and reading the
STATUS register can be performed by a single read by the
MPU: states S1 and S2 can be combined in a single
instruction, the same for S3 and S4.
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NCN6000
ABBREVIATIONS
Lout_H
Lout_L
Cout
VCC
Icc
DC−DC External Inductor
DC−DC External Inductor
Output Capacitor
Card Power Supply Input
Current at CRD_VCC Pin
5.0 V Smart Card
Class A
Class B
CS
3.0 V Smart Card
Chip Select (from MPU)
Z
High Impedance Logic State
(according to ISO7816)
CRD_VCC
Interface IC Card Power Supply Output
Interface IC Card Clock Output
Interface IC Card Reset Output
Interface IC Card I/O Signal Line
Interface IC Card Detection
Answer to Reset
CRD_CLK
CRD_RST
CRD_IO
CRD_DET
ATR
PGM
INT
tr
Select Programming or Normal Operation
Interrupt (to MPU)
Rise Time
tf
Fall Time
td
Delay Time
ts
Storage Time
PIN FUNCTIONS AND DESCRIPTION
Pin
Name
Type
Description
1
A0
INPUT
This pin is combined with A1, PGM, RESET and I/O to program the chip mode of operation
and to read the data provided by STATUS. (Figures 4 and 5 and Tables 2 and 3)
2
3
4
A1
INPUT
INPUT
This pin is combined with A0, PGM, RESET and I/O to program the chip mode of operation
and to read the data provided by STATUS. (Figures 4 and 5 and Tables 2 and 3)
PGM
This pin is combined with A0, A1, RESET and I/O to program the chip mode of operation
and to read the data provided by STATUS. (Figures 4 and 5 and Tables 2 and 3)
PWR_ON
INPUT
This pin validates the operation of the internal DC−DC converter:
CS = L + PWR_ON = Negative going: DC−DC is OFF
CS = L + PWR_ON = Positive going: DC−DC is ON
Note: The PWR_ON bit must be combined with a Low state CS signal to activate
the function. (Table 2)
Pull Down
5
6
STATUS
CS
OUTPUT
This pin provides logic state related to the card and NCN6000 status. According to the A0,
A1 and PGM logic state, this pin carries either the Card present status or the Vbat or the
DC−DC operation state. When PGM = L, STATUS is not affected, see Table 2.
INPUT
Pull Up
This pin provides the NCN6000 chip select function. The PWR_ON, RESET, I/O, A0, A1 and
PGM signals are disabled when CS = H. When PGM = L and CS = L, the device jumps to
the programming mode (Figure 4 and Tables 1, 2 and 3). The Chip Select pin must be a
unique physical address when more than one card are controlled by a single MPU. The data
presented by the MPU are latched upon positive going edge of the Chip Select pin.
7
RESET
INPUT
This pin provides two modes of operation depending upon the logic state of PGM pin 3:
PGM = 1: The signal present at this pin is translated to pin 12 (card reset
signal) when CS = L and PWR_ON = H. It is latched when CS = H.
PGM = 0: The signal present on this pin is used as a logic input to program the
internal functions (Figure 5 and Tables 2 and 3).
Pull Down
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NCN6000
PIN FUNCTIONS AND DESCRIPTION (continued)
Pin
Name
Type
Description
8
I/O
Input/Output
Pull Up
This pin is connected to an external microcontroller interface. A bidirectional level translator
adapts the serial I/O signal between the smart card and the microcontroller. The level
translator is enabled when CS = L. The signal present on this pin is latched when CS = H.
This pin is also used in programming mode (Tables 1, 2 and 3, Figures 4 and 5).
9
INT
OUTPUT
Pull Down
This pin is activated LOW when a card has been inserted and detected by the interface or
when the NCN6000 reports Vbat or CRD_VCC status (See Table 6). The signal is reset to
a logic 1 on the rising edge of either CS or PWR_ON. The Collector open mode makes
possible the wired AND/OR external logic. When two or more interfaces share the INT
function with a single microcontroller, the software must poll the STATUS pin to identify the
origin of the interrupt (Figure 5).
10
CLOCK_IN
CLOCK INPUT
High Impedance
This pin can be connected to either the microcontroller master clock, or to any clock signal,
to drive the external smart cards. The signal is fed to internal clock selector circuit and
translated to the CRD_CLK pin at either the same frequency, or divided by 2 or 4 or 8,
depending upon the programming mode (Tables 1, 2 and 3).
Care must be observed, at PCB level, to minimize the pick−up noise coming from the
CLOCK_IN line. It is recommended to put a shield, built with a 10 mil copper track, around
this line and terminated to the GND.
11
CRD_DET
INPUT
The signal coming from the external card connector is used to detect the presence of the
card. A built−in pull up low current source makes this pin active LOW or HIGH, assuming
one side of the external switch is connected to ground. At Vbat start up, the default
condition is Normally Open switch, negative going insertion detection. The Normally
Closed switch, positive going insertion detection, can be defined by programming the
NCN6000 accordingly. In this case, the polarity must be set up during the first cycles of the
system initialization, otherwise an already inserted card will not be detected by the chip.
12
13
CRD_RST
CRD_CLK
OUTPUT
OUTPUT
This pin is connected to the RESET pin of the card connector. A level translator adapts the
RESET signal from the microcontroller to the external card. The output current is internally
limited to 15 mA. The CRD_RST is validated when PWR_ON = H and PGM = H and hard
wired to Ground when the card is deactivated.
This pin is connected to the CLK pin of the card connector. The CRD_CLK signal comes
from the clock selector circuit output. Combining A0, A1, PGM and I/O, as depicted in
Table 3 and Figure 3, programs the clock selection. This signal can be forced into a
standby mode with CRD_CLK either High or Low, depending upon the mode defined by
the programming sequence (Tables 1, 2 and 3 and Figure 4).
Care must be observed, at PCB level, to minimize the pick−up noise coming from the
CRD_CLK line. It is recommended to put a shield, built with a 10mil copper track, around
this line and terminated to the GND.
14
15
CRD_IO
I/O
This pin handles the connection to the serial I/O pin of the card connector. A bidirectional
level translator adapts the serial I/O signal between the card and the microcontroller. The
CRD_IO pin current is internally limited to 15 mA. A built−in register holds the previous
state presents on the I/O input pin.
CRD_VCC
POWER
This pin provides the power to the external card. It is the logic level “1” for CRD_IO,
CRD_RST and CRD_CLK signals. The energy stored by the DC−DC external inductor
Lout must be smoothed by a 10 ꢀ F capacitor, associated with a 100 nF ceramic in parallel,
connected across CRD_VCC and GND. In the event of a CRD_VCC U
voltage, the
VLOW
NCN6000 detects the situation and feedback the information in the STATUS bit. The device
does not take any further action, particularly the DC−DC converter is neither stopped nor
reprogrammed by the NCN6000. It is up to the external MPU to handle the situation.
However, when the CRD_VCC is overloaded, the NCN6000 shut off the DC−DC converter,
pulls the INT pin Low and reports the fault in the STATUS register.
16
17
18
GROUND
PWR_GND
Lout_L
SIGNAL
POWER
POWER
The logic and low level analog signals shall be connected to this ground pin. This pin must
be externally connected to the PWR_GND pin 17. The designer must make sure no high
current transients are shared with the low signal currents flowing into this pin.
This pin is the Power Ground associated with the built−in DC−DC converter and must be
connected to the system ground together with GROUND pin 11. Using good quality ground
plane is recommended to avoid spikes on the logic signal lines.
The High Side of the external inductor is connected between this pin and Lout_H to provide
the DC−DC function. The built−in MOS devices provide the switching function together with
the CRD_VCC voltage rectification.
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NCN6000
PIN FUNCTIONS AND DESCRIPTION (continued)
Pin
Name
Type
Description
19
Lout_H
POWER
The High Side of the external inductor is connected between this pin and Lout_L to provide
the DC−DC function. The current flowing into this inductor is limited by a sense resistor
internally connected from Vbat/pin 20 and pin 19. Typically, Lout = 22ꢁ ꢀ H, with ESR
< 2.0 ꢂ, for a nominal 55 mA output load.
20
Vbat
POWER
This pin is connected to the supply voltage and monitored by the NCN6000. The operation
is inhibited when Vbat is below the minimum 2.70 V value, followed by a PWR_DOWN
sequence and a Low STATUS state.
MAXIMUM RATINGS (Note 1)
Rating
Symbol
Vbat
Ibat
Value
7.0
Unit
V
Battery Supply Voltage
Battery Supply Current (Note 2)
Power Supply Voltage
Power Supply Current
Digital Input Pins
300
mA
V
Vcc
6.0
Icc
"100
mA
V
Vin
−0.5 V < V < V +0.5 V,
in bat
but < 7.0 V
Digital Input Pins
Iin
"5.0
mA
V
Digital Output Pins
Vout
−0.5 V < V < V +0.5 V,
in bat
but < 7.0 V
Digital Output Pins
Iout
Vcard
Icard
ILout
VESD
"10
mA
V
Card Interface Pins
−0.5 V < V
< CRD_VCC +0.5 V
card
Card Interface Pins, except CRD_CLK
Inductor Current
"15
mA
mA
kV
300
ESD Capability (Note 3)
Standard Pins
Card Interface Pins and CRD_DET
2.0
8.0
TSSOP−20 Package
Power Dissipation @ Tamb = +85°C
Thermal Resistance Junction to Air (R
320
125
mW
°C/W
P
DS
)
ꢃ
ja
R
ꢃ
ja
Operating Ambient Temperature Range
Operating Junction Temperature Range
TA
TJ
−25 to +85
−25 to +125
+150
°C
°C
°C
°C
Maximum Junction Temperature (Note 4)
Storage Temperature Range
TJmax
Tsg
−65 to +150
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. Maximum electrical ratings are defined as those values beyond which damage to the device may occur at T = +25°C.
A
2. This current represents the maximum peak current the pin can sustain, not the NCN6000 consumption (see Ibat ).
op
3. Human Body Model, R = 1500 ꢂ, C = 100 pF.
4. Absolute Maximum Rating beyond which damage to the device may occur.
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NCN6000
POWER SUPPLY SECTION (−25°C to +85°C ambient temperature, unless otherwise noted.)
Rating
Symbol
Pin
20
Min
Typ
Max
Unit
V
Power Supply
Vbat
2.7
−
6.0
Standby Supply Current Conditions:
PWR_ON = L, STATUS = H, CLOCK_IN = H,
CS = H. All other logic inputs and outputs are open:
Vbat = 3.0 V
Ibat
20
ꢀ
A
sb
op
−
−
3.0
−
8.0
15
Vbat = 5.0 V
DC Operating Current (Figure 19)
PWR_ON = H, CLOCK_IN = 0, CS = H, all CRD pins
unloaded
Ibat
20
mA
@ Vbat = 6.0 V, CRD_VCC = 5.0 V
@ Vbat = 3.6 V, CRD_VCC = 5.0 V
−
−
7.0
2.0
−
5.0
Vbat Undervoltage Detection
Vbat Undervoltage Detection
Vbat Undervoltage Detection
Vbat
Vbat
20
15
2.1
2.0
−
−
−
100
2.7
2.6
−
V
V
mV
High
LH
LL
Low
Vbat
Hysteresis
HY
Output Card Supply Voltage @ Icc = 55 mA
@ 2.70 V vVbat v6.0 V
CRD_VCC = 3.0 V
Vcc
V
V
V
2.75
4.75
−
−
3.25
5.25
C3H
C5H
CRD_VCC = 5.0 V
@ Vbat < Vbat < 2.70 V
LL
CRD_VCC = 5.0 V
V
4.50
−
−
C5H
Output Card Supply Peak Current @ Vcc = 5.0 V
@ CRD_VCC = 5.0 V
@ CRD_VCC = 3.0 V
Iccp
15
mA
55
55
65
−
−
−
−
−
−
@ Vbat = 3.6 V, CRD_VCC = 5.0 V, Tamb < 65°C
Output Current Limit Time Out
Output Over Current Limit
tdoff
Iccov
Iccd
15
15
15
−
−
4.0
−
−
100
−
ms
mA
mA
Output Dynamic Peak Current @ CRD_VCC = 3.0 V
or 5.0 V, Cout = 10 ꢀ F Ceramic XR7, Pulse Width
400 ns (Notes 5 and 6)
100
−
Battery Start−Up Current
Icc
20
15
mA
mV
st
@ CRD_VCC = 3.0 V, −25°C v TA v+ 85°C
@ CRD_VCC = 5.0 V, −25°CvTAv+ 85°C
−
−
140
300
−
−
Output Card Supply Voltage Ripple @ Lout = 22 ꢀ H,
Cout 1 = 10 ꢀ F, Cout 2 = 100 nF, Vbat = 3.6 V
Vcc
rip
−
−
−
−
50
50
Iout = 55 mA
(Note 5)
CRD_VCC = 5.0 V
CRD_VCC = 3.0V
Output Card Supply Turn On Time @ Lout = 22 ꢀ F,
Cout1 = 10 ꢀ F, Cout2 = 100 nF, Vbat = 2.7 V,
CRD_VCC = 5.0 V
Vcc
15
15
−
−
2.0
ms
TON
Output Card Supply Shut Off Time @ Cout1 = 10 ꢀ F,
Vcc
−
−
250
ꢀ
s
TOFF
Ceramic, Vbat = 2.7 V, CRD_VCC = 5.0 V,
Vcc
< 0.4 V
OFF
DC−DC Converter Operating Frequency
Power Switch Drain/Source Resistor
Output Rectifier ON Resistor
Fsw
18
18
15
−
−
−
600
1.9
2.8
−
kHz
ꢂ
R
ONS
R
OND
2.2
3.4
ꢂ
5. Ceramic X7R, SMD types capacitors are mandatory to achieve the CRD_VCC specifications. When electrolytic capacitor is used, the
external filter must include a 100 nF, max 50 mꢂ ESR capacitor in parallel, to reduce both the high frequency noise and ripple to a minimum.
Depending upon the PCB layout, it might be necessary is to use two 6.8 ꢀ F/10 V/ceramic/X7R//SMD1206 in parallel, yielding an improved
CRD_VCC ripple over the temperature range.
6. According to ISO7816−3, paragraph 4.3.2.
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NCN6000
DIGITAL PARAMETERS SECTION @ 2.70 VvVbatv6.0 V, NORMAL OPERATING MODE (−25°C to +85°C ambient
temperature, unless otherwise noted.) Note: Digital inputs undershoot < −0.30 V to ground, Digital inputs overshoot <0.30 V to Vbat
Rating
Symbol
Pin
Min
Typ
Max
Unit
Input Asynchronous Clock Duty Cycle = 50%
@ Vbat = 3.0V over the temperature range
F
10
−
−
CLKIN
40
MHz
ns
Clock Rise Time
Clock Fall Time
F
10
−
−
−
−
5.0
5.0
tr
F
tf
I/O Data Transfer Switching Time,
Both Directions (I/O and CRD_IO),
@ Cout = 30 pF
8, 14
−
−
ꢀ
s
I/O Rise Time* (Note 7)
I/O Fall Time
T
T
0.8
0.8
RIO
FIO
Input/Output Data Transfer Time, Both Directions
@ 50% CRD_VCC, L to H and H to L
T
8, 14
4
−
−
−
150
ns
TIO
Minimum PWR_ON Low Level Logic State Time
to Power Down the DC−DC Converter
T
2.0
−
ꢀ s
WON
CRD_VCC Power Up/Down Sequence Interval
STATUS Pull Up Resistance
T
−
0.5
50
50
50
−
2.0
80
ꢀ s
kꢂ
kꢂ
kꢂ
V
DSEQ
R
5
6
9
20
20
STA
Chip Select CS Pull Up Resistance
Interrupt INT Pull Up Resistance
R
80
CSPU
INTPU
R
20
80
Positive Going Input High Voltage Threshold (A0,
A1, PGM, PWR_ON, CS, RESET, CRD_DET)
V
1, 2,
3, 4,
6, 7,
11
0.70 * Vbat
Vbat
IH
Negative Going Input High Voltage Threshold
(A0, A1, PGM, PWR_ON, CS, RESET,
CRD_DET)
V
1, 2,
3, 4,
6, 7,
11
0
−
0.30 * Vbat
V
IL
Output High Voltage
V
5, 9
Vbat − 1.0 V
−
−
−
−
V
V
OH
STATUS, INT @ I = −10 ꢀ A
OH
Output High Voltage
V
5, 9
0.40
OL
STATUS, INT @ I = 200 ꢀ A
OH
7. Since a 20 kꢂ pull up resistor is provided by the NCN6000, the external MPU can use an Open Drain connection.
DIGITAL PARAMETERS SECTION @ 2.70 VvVbatv6.0 V, CHIP PROGRAMMING MODE (−25°C to +85°C ambient
temperature, unless otherwise noted.)
Rating
Symbol
Pin
Min
Typ
Max
Unit
A0, A1, PGM, PWR_ON, RESET and I/O
Data Set Up Time
T
1, 2,
3, 4,
7, 8
2.0
−
−
SMOD
ꢀ
s
A0, A1, PGM, PWR_ON, RESET and I/O
Data Set Up Time
T
1, 2,
3, 4,
7, 8
2.0
2.0
−
−
−
−
HMOD
ꢀ s
ꢀ s
Chip Select CS Low State Pulse Width
T
6
WCS
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NCN6000
SMART CARD SECTION (−25°C to +85°C ambient temperature, unless otherwise noted.)
Rating
Symbol
Pin
Min
Typ
Max
Unit
CRD_RST @ CRD_VCC = +5.0 V
12
−
Output RESET V
Output RESET V @ Icrd_rst = 200 ꢀ A
@ Icrd_rst = −20 ꢀ A
V
V
CRD_VCC − 0.9
0
CRD_VCC
0.4
V
V
OH
OH
OL
OL
t
t
100
100
ns
ns
Output RESET Rise Time @ Cout = 30 pF
Output RESET Fall Time @ Cout = 30 pF
R
F
CRD_RST @ Vcc = +3.0 V
V
V
CRD_VCC − 0.9
0
CRD_VCC
0.4
V
V
Output RESET V
Output RESET V @ Icrd_rst = 200 ꢀ A
@ Icrd_rst = −20 ꢀ A
OH
OH
OL
OL
t
t
100
100
ns
ns
Output RESET Rise Time @ Cout = 30 pF
Output RESET Fall Time @ Cout = 30 pF
R
F
CRD_CLK @ CRD_VCC = +3.0 V or +5.0 V
13
−
CRD_VCC = +5.0 V
Output Frequency (See Note 8)
F
F
5.0
55
18
MHz
%
ns
ns
V
CRDCLK
Output Duty Cycle @ DC Fin = 50% "1%
Output CRD_CLK Rise Time @ Cout = 30 pF
Output CRD_CLK Fall Time @ Cout = 30 pF
F
45
CRDDC
t
R
t
18
F
Output V
@ Icrd_clk = −20 ꢀ A
V
3.15
0
CRD_VCC
+0.5
OH
OH
V
V
Output V @ Icrd_clk = 100 ꢀ A
OL
OL
CRD_VCC = +3.0 V
Output Frequency (See Note 8)
Output Duty Cycle @ DC Fin = 50% "1%
Output CRD_CLK Rise Time @ Cout = 30 pF
Output CRD_CLK Fall Time @ Cout = 30 pF
5.0
60
18
MHz
%
ns
ns
V
CRDCLK
F
40
CRDDC
t
R
t
18
F
V
1.85
0
CRD_VCC
0.7
Output V @ Icrd_clk = −20 ꢀ A @ Cout = 30 pF
OH
OH
V
V
Output V @ Icrd_clk = 100 ꢀ A @ Cout = 30 pF
OL
OL
CRD_I/O @ CRD_VCC = +5.0 V
CRD_I/O Data Transfer Frequency
CRD_I/O Rise Time @ Cout = 30 pF
CRD_I/O Fall Time @ Cout = 30 pF
14
F
315
315
kHz
ꢀ s
ꢀ s
V
IO
T
0.8
0.8
CRD_VCC
0.4
RIO
T
FIO
Output V @ Icrd_i/o = −20 ꢀ A
V
CRD_VCC − 0.9
0
OH
OH
V
Output V @ Icrd_i/o = 500 ꢀ A, V = 0 V
V
OL
OL
IL
CRD_I/O @ CRD_VCC = +3.0 V
CRD_I/O Data Transfer Frequency
CRD_I/O Rise Time @ Cout = 30 pF
CRD_I/O Fall Time @ Cout = 30 pF
F
kHz
ꢀ s
ꢀ s
V
IO
T
0.8
0.8
CRD_VCC
0.4
RIO
T
FIO
V
CRD_VCC − 0.9
0
Output V @ Icrd_i/o = −20 ꢀ A
OH
OH
V
Output V @ Icrd_i/o = 500 ꢀ A, V = 0 V
V
OL
OL
IL
CRD_IO Pull Up Resistor @ PWR_ON = H
R
14
11
14
20
−
26
kꢂ
CRDPU
Card Detection Debouncing Delay:
Card Insertion
Card Extraction
T
50
50
150
150
ꢀ s
ꢀ s
CRDIN
T
CRDOFF
Card Insertion or Extraction Positive Going Input
High Voltage
V
11
11
0.70 * Vbat
−
−
Vbat
V
IHDET
Card Insertion or Extraction Negative Going Input
Low Voltage
V
0
−
−
−
0.30 * Vbat
V
ILDET
Card Detection Bias Pull Up Current @
Vbat = 5.0 V
I
11
10
−
−
ꢀ A
mA
mA
DET
Output Peak Max Current Under Card Static
Operation Mode @ Vcc = 3.0 V or Vcc = 5.0 V
Icrd_iorst
Icrd_clk
12, 14
13
15
70
Output Peak Max Current Under Card Static
Operation Mode @ Vcc = 3.0 V or Vcc = 5.0 V
−
8. The CRD_CLK clock can operate up to 20 MHz, but the rise and fall time are not guaranteed to be fully within the ISO7816 specification over
the temperature range. Typically, tr and tf are 12 ns @ CRD_CLK = 10 MHz.
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11
NCN6000
Programming and Status Functions
The NCN6000 features a programming interface and a status interface. Figure 4 illustrates the programming mode.
Table 1. Programming and Status Functions Pinout Logic
CRD_VCC
Prg. 3.0 V/5.0 V
CLOCK_IN
Divide Ratio
CLOCK STOP Poll Card DC−DC
Vbat
Status
CRD_VCC
Status
AND START
Status
READ
0
Status
READ
0
Pins
Name
STATUS
CS
CRD_DET
5
6
Not Affected
Not Affected
Not Affected
Not Affected
READ
0
READ
0
Latch On
Latch On
Latch On
Latch On
Rising Edge
Rising Edge
Rising Edge
Rising Edge
3
1
2
7
8
PGM
A0
0
0
0
0/1
1
0
0/1
0
1
0
0
Z
Z
1
1
0
Z
Z
1
0
1
Z
Z
1
1
1
Z
Z
0/1
0/1
0
0/1
0/1
0
A1
RESET
I/O (in)
1
1
0/1
0/1
0/1
0/1
The PGM signal, pin 3, controls the mode of operation (chip programming or smart card transaction) and must be set up
accordingly prior to pull Chip Select (pin 6) Low.
Table 2. Status Pin Logic Output
Name
None
CS
H
PGM
A1
X
A0
X
Status Logic Level
X
L
No Chip Access
None
L
X
X
Programming Mode, No Read Available
CARD PRESENT
L
H
L
L
Low: No Card Inserted
High: Card inserted
DC−DC
Vbat
L
L
L
H
H
H
L
H
H
H
L
Low: DC−DC Over Range
High: DC−DC Operates Normally
Low: Vbat Within Range
High: Vbat Below Minimum range
CRD_VCC Overload
H
Low: CRD_VCC Voltage Below Minimum Range
High: CRD_VCC in Range
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NCN6000
Card VCC, Card CLOCK and Card Detection
Polarity Programming
is state 1: asynchronous clock, ratio 1/1, CRD_CLK
active, CRD_DET = Normally Open, CRD_VCC = 3.0 V.
All states are latched for each output variable in
programming mode at the positive going slope of Chip
Select [CS] signal. It is the system designer’s responsibility
to set up the options needed to match the chip with the
peripherals. In particular, when using Normally Close
switch, the CRD_DET polarity must be defined during the
first cycles of the initialization.
The CRD_VCC and CLOCK_IN programming options
allows matching the system frequency with the card clock
frequency, and to select 3.0 V or 5.0 V CRD_VCC supply.
The CRD_DET programming option allows the usage of
either Normally Open or Normally Close detection switch.
Table 3 highlights the A0, A1, PGM and I/O logic states for
the possible options. The default power up reset condition
Table 3. Card VCC, Card Clock and Card Detection Polarity Truth Table
HEXA CS PWR_ON PGM RESET A1
A0 I/O
CRD_VCC
3.0 V
CRD_CLK
CRD_DET
−
STATUS
$00
$01
$02
$03
$04
$05
$06
$07
$08
$09
$0A
$0B
$0C
L
L
L
L
L
L
L
L
L
L
L
L
L
−
−
−
−
−
−
−
−
−
−
−
−
−
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
L
CLOCK_IN 1/1
H (Note 13)
3.0 V
3.0 V
3.0 V
5.0 V
5.0 V
5.0 V
5.0 V
−
CLOCK_IN 1/2
CLOCK_IN 1/4
CLOCK_IN 1/8
CLOCK_IN 1/1
CLOCK_IN 1/2
CLOCK_IN 1/4
CLOCK_IN 1/8
START
−
−
−
−
−
−
−
−
−
−
−
H (Note 13)
H (Note 13)
H (Note 13)
H (Note 13)
H (Note 13)
H (Note 13)
H (Note 13)
H (Note 13)
H (Note 13)
H (Note 13)
H (Note 13)
H (Note 13)
L
L
H
H
L
L
L
H
L
L
H
H
H
H
L
L
L
H
L
L
H
H
L
L
H
L
H
H
H
H
H
L
L
H
L
−
STOP Low
L
H
H
L
−
STOP High
Reserve
L
H
L
−
H
−
−
Normally Open
(Note 12)
$0D
$0E
$0F
L
L
L
−
−
−
L
L
L
H
H
H
H
H
H
L
H
H
H
L
−
−
−
−
−
−
Normally Close
(Note 12)
H (Note 13)
H (Note 13)
H (Note 13)
Normally Close
(Note 12)
H
Normally Close
Note 12)
$10
$12
$14
$16
L
L
L
L
−
1
−
1
H
H
H
H
Z
Z
Z
Z
L
L
L
H
L
Z
Z
Z
Z
−
−
−
−
−
−
−
−
−
−
−
−
Card Present
DC−DC status
Vbat
H
H
H
CRD_VCC
9. The programmed conditions are latched upon the Chip Select (CS, pin 6) positive going transient.
10.Card clock integrity is guaranteed no spikes whatever be the frequency switching.
11. The STATUS register is not affected when the NCN6000 operates in any of the programming functions.
12.The CRD_VCC and CRD_CLK are not affected when the NCN6000 operates outside their respective decoded logic address.
13.The High Level on STATUS in registers $00 to $0F, inclusive, having being implemented to reduce current consumption but have no other
meanings.
14.At turn on, the NCN6000 is initialized with CRD_VCC = 3.0V, CLOCK_IN Ratio = 1/1, CRD_CLK = START, CRD_DET = Normally Open.
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13
NCN6000
DC−DC Converter and Card Detector Status
The STATUS pin provides a feedback related to the
detection of the card, the state of the DC−DC converter, the
Vbat undervoltage and CRD_VCC undervoltage situations.
When PGM = H, the STATUS pin returns a High if a card is
detected present, a Low being asserted if there is no card
inserted. In any case, the external card is not automatically
powered up. When the external MPU asserts PWR_ON = H,
together with CS = L, the CRD_VCC supply is provided to
the card and the state of the DC−DC converter, the Vbat and
the CRD_VCC can be polled through the STATUS pin.
The NCN6000 status can be polled when CS = L. Please
consult Figures 4 and 5 for a description of input and output
signals. The status message is described in Table 4.
Note: in order to cope with a start up under low battery
condition, the Vbat OK message uses a negative logic as
depicted here below.
Table 4. Card and DC−DC Status Output
PGM
HIGH
HIGH
HIGH
A1
L
A0
L
STATUS
LOW
Message
No Card
Card Power Supply Timing
At power up, the CRD_VCC power supply rise time
depends upon the current capability of the DC−DC
converter associated with the external inductor L1 and the
reservoir capacitor connected across CRD_VCC and
GROUND.
On the other hand, at turn off, the CRD_VCC fall time
depends upon the external reservoir capacitor and the peak
current absorbed by the internal CMOS transistor built
across CRD_VCC and GROUND. These behaviors are
depicted in Figure 6. Since these parameters have finite
values, depending upon the external constraints, the
L
L
HIGH
LOW
Card Present
L
H
DC−DC Converter
Overloaded
HIGH
HIGH
HIGH
HIGH
HIGH
L
H
H
H
H
H
L
HIGH
LOW
HIGH
HIGH
LOW
DC−DC Converter OK
Vbat OK
L
Vbat Undervoltage
CRD_VCC OK
H
H
CRD_VCC Undervoltage
designer must take care of these limits if the t or the t
ON
OFF
provided by the data sheets does not meet his requirements.
Typical CRD_VCC Rise Time @ Cout = 10 ꢀ F, V = 5.0 V
Typical CRD_VCC Fall Time @ Cout = 10 ꢀ F, V = 5.0 V
Figure 6. Card Power Supply Turn ON and OFF Timing
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14
NCN6000
Basic Operating Modes Flow Chart
bidirectional I/O line. Leaving aside the DC−DC control and
associated failures, the NCN6000 does not take any further
responsibility in the data transaction.
When the chip operates in the programming mode, the
NCN6000 provide a flexible access to set up the CRD_VCC
voltage, the CRD_CLK and the CRD_DET smart card
signals.
The NCN6000 brings all the functions necessary to handle
data communication between a host computer and the smart
card. The built−in Chip Select pin provides a simple way to
share the same MPU bus with several card interface. On top
of that, the logic control are derived from specific pins,
avoiding the risk of mixing up the operation when the
interface is controlled by a low end microcontroller.
The external microcontroller takes care of the smart card
transaction and shall handle the interface accordingly.
During the transaction operation, the external MPU takes
care of whatever is necessary to he data on the single
RESET
Vbat = OK
STAND BY MODE
CS = H
PGM = H
SELECT OPERATING MODE
FINISH
CS = H
PGM = L
CS = L
PGM = H
CS = L
PROGRAMMING
MODE
ACTIVE MODE
PWR_ON = H
SET NCN6000
PARAMETERS
SEND ATR SEQUENCE
TRANSACTION MODE
LATCH NCN6000
PARAMETERS
PGM = H
CS = H
END MODE
IDLE MODE
POWER DOWN SEQUENCE
Figure 7. Operating Modes Flow Chart
Standby Mode
When a card is inserted, the internal logic filters the signal
present pin 11, then asserts the INT pin to Low if the pulse
applied to CRD_DET is longer than 150 ꢀ s. The external
MPU shall run whatever is necessary to handle the card.
The INT is cleared (return to High) when a positive going
transition is asserted to either the CS or to the PWR_ON
signal logically combined with Chip Select = Low.
The Standby Mode allows the NCN6000 to detect a card
insertion, keeping the power consumption at a minimum.
The power supply CRD_VCC is not applied to the card, until
the external controllers set PWR_ON = H with CS = L.
Standby Mode
Logic Conditions:
Card Output:
CS = H
PWR_ON = H
CRD_VCC = 0 V
CRD_CLK = L
CRD_RST = L
CRD_IO = L
A0
A1
PGM
I/O
RESET
= Z
= Z
= Z
= Z
= Z
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NCN6000
Programming Mode
The I/O and RESET pins are not connected to the smart
card and become logic inputs to control the NCN6000
programming sequence. The programmed values are
latched upon transition of CS from Low to High, PGM being
Low during the transition.
When a programming mode is validated by a Chip Select
negative going transient, the mode is latched and PGM can
be released to High. This latch is automatically reset when
CS returns to High.
The programming mode allows the configuration of the
card power supply, card clock and Card Detection input
logic polarity. These signals (CRD_VCC, CRD_CLK and
CRD_DET) are described in the pin description paragraph
associated with Tables 1 and 3 and Figures 4 and 8.
Programming Mode
Logic Conditions:
Card Output:
The logic input signals can be set simultaneously, or one
bit a time (using either a STAA or a BSET function), the key
point being the minimum delay between the shorter bit and
the Chip Select pulse. The programmed value is latched into
the NCN6000 register on the CS positive going edge.
CS = L
PWR_ON = L
CRD_VCC = 0 V
CRD_CLK = L
CRD_RST = L
CRD_IO = H/L depending upon
the previous I/O pin
logic state
A0
= H/L
A1
PGM
I/O
= H/L
= L
= L/H
= L/H
RESET
PROGRAMMING
NORMAL MODE
PGM
I/O
A0
A1
RESET
CS
2 ꢀ s 1 ꢀ s 2 ꢀ s
Figure 8. Minimum Programming Timings
Active Mode
The Chip Select pulse [CS] will automatically clear the
previously asserted INT signal upon the positive going
transition.
If a card is present, the MPU shall activate the DC−DC
converter by asserting PWR_ON = H. The NCN6000 will
automatically run a power up sequence when the
In the active mode, the NCN6000 is selected by the
external MPU and the STATUS pin can be polled to get the
status of either the DC−DC converter or the presence of the
card (inserted or not valid). The power is not connected to
the card: CRD_VCC = 0 V.
CRD_VCC reaches the undervoltage level (either V
or
C5H
V , depending upon the CRD_VCC voltage supply
C3H
Active Mode
programmed). The CRD_IO, CRD_RST and CRD_CLK
pins are validated, according to the ISO7816−3 sequence.
The interface is now in transaction mode and the system is
ready for data exchange through the I/O and RESET lines.
At any time, the microcontroller can change the CRD_CLK
frequency and mode, or the CRD_VCC value as determined
by the card being in use.
Logic Conditions:
Card Output:
CS = L
PWR_ON = L
CRD_VCC = 0 V
CRD_CLK = L
CRD_RST = L
CRD_IO = H/L depending upon
the previous I/O pin
logic state
A0
A1
PGM
I/O
RESET
= L
= L
= H
= Z
= Z
STATUS = L/H is Card
Inserted?
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16
NCN6000
Transaction Mode
In addition, the CRD_CLK signal can be stopped, as
depicted in Tables 3 and 4, to minimize the current
consumption of the external smart card, leaving CRD_VCC
active.
During the transaction mode, the NCN6000 maintains
power supply and clock signal to the card. All the signal
levels related with the card are translated as necessary to
cope with the MPU and the card.
The DC−DC converter status and the Vbat state can be
monitored on the STATUS by using the A0 and A1 logic
inputs as depicted in Tables 3 and 4.
Power Down Operation
The power down mode can be initiated by either the
external MPU (pulling PWR_ON = L) or by one of the
internal error condition (CRD_VCC overload or Vbat Low).
The communication session is terminated immediately,
according to the ISO7816−3 sequence. On the other hand,
the MPU can run the Standby mode by forced CS = H.
When the card is extracted, the interface shall detect the
operation and run the Power Shut Off of the card as
described by the ISO/CEI 7816−3 sequence depicted here
after:
Transaction Mode
Logic Conditions:
Card Output:
CS = L
PWR_ON = H
CRD_VCC = 3.0 or 5.0 V
CRD_CLK = CLOCK
CRD_RST = H/L
A0
= H
A1
PGM
I/O
= H
= H
= DATA
TRANSFER
= H/L
CRD_IO = DATA
TRANSFER
ISO7816−3 sequence:
⇒ Force RST to Low
RESET
STATUS = L/H DC−DC
status: Fail/Pass?
⇒ Force CLK to Low, unless it is already in this state
⇒ Force CRD_IO to Low
⇒ Shut Off the CRD_VCC supply
To make sure the data are not polluted by power losses, it
is recommended to check the state of CRD_VCC before
launching a new data transaction. Since CS = L, this is
achieved by forcing bits A0 and A1 according to Table 4, and
reading the STATUS pin 5.
Since the internal digital filter is activated for any card
insertion or extraction, the physical power sequence will be
activated 150 ꢀ s maximum after the card has been extracted.
Of course, such a delay does not exist when the MPU launch
the power down intentionally.
The time delay between each negative going signal is
500 ns typical (Figure 10).
Idle Mode
The idle mode is used when a card is powered up
(CRD_VCC = Vcc), without communication on going.
Idle Mode
Logic Conditions:
Card Output:
CS = L
PWR_ON = H
CRD_VCC = 3.0 or 5.0 V
CRD_CLK = CLOCK active or
L or H
CRD_RST = H
CRD_IO = Z
A0
A1
PGM
I/O
RESET
= H
= H
= H
= Z
= H
STATUS = L/H according
to the internal
register results
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NCN6000
CARD EXTRACTION
DETECTED
CRD_VCC Voltage
CRD_CLK
CRD_RST
CRD_IO
Digital Filter Delay (50 ꢀ s min)
Figure 9. Typical Power Down Sequence in the NCN6000 Interface
CRD_VCC
CRD_RST
CRD_CLK
CRD_IO
Figure 10. Power Down Sequence Details
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NCN6000
Card Detection
The transition presents pin 11, whatever be the polarity, is
filtered out by the internal digital filter circuit, avoiding false
interrupt. In addition to the minimum internal 50 ꢀ s timing,
the MPU shall provide an additional delay to cope with the
mechanical stabilization of the card interface (typically
3 ms), prior to valid the CRD_VCC supply.
When a card is inserted, the detector circuit asserts
INT = Low as depicted before. When the NCN6000 detects
a card extraction, the power down sequence is activated,
regardless of the PWR_ON state, and the INT pin is asserted
Low. It is up to the external MPU to clear this interrupt by
forcing a chip select pulse as depicted in Figure 5.
The 75 ꢀ s delay represent the digital filter built−in the
NCN6000 chip being used for the characterization. Any
pulse shorter than this delay does not generate an interrupt.
However, to guarantee an interrupt will be generated, the
CRD_DET signal must be longer than 150 ꢀ s as defined by
the specification.
The card detector circuit provides a 500 kꢂ pull up
resistor to bias the CRD_DET pin, yielding a logic High
when the pin is left open (assuming a NO switch). The
internal logic associated with pin 11 provides an automatic
selection of the slope card detection, depending upon the
polarity set by the external MPU. At start up, the CRD_DET
is preset to cope with Normally Open switch. When a
Normally Close switch is used in the card socket, it is
mandatory to program the NCN6000 chip during the
initialization sequence, otherwise the system will not start if
a card was previously inserted. Table 3 gives the
programming code for such a function. The next lines
provide a typical assembler source to handle this CRD_DET
Normally Close polarity:
Smart EQU $20
LDX #$1000
LDAA #$09
; NCN6000 Physical CS Address
; Offset
; I/O = H, A0 = A1 = L, RESET = H
The Chip Select pulse is generated by the external
microcontroller, the minimum pulse width being 2 ꢀ s to
make sure the card is detected.
STAA smart, X ; Set CRD_DET = Normally Closed
Switch
The oscillogram, Figure 11, depicts the behavior for a
Normally Open switch, the delay existing between the
interrupt negative going state and the CS being Low comes
from the particular software latency existing in this
particular MPU.
The CRD_DET polarity can be updated at any time,
during the Program Mode sequence (PGM = L), but,
generally speaking, is useless since the switch does not
change during the usage of the considered module. On the
other hand, the card detection switch shall be connected
across pin 11 and ground, for any polarity selected.
Digital Filter Delay
INTERRUPT
Chip Select Acknowledge or Clear Interrupt
Figure 11. Card Insertion Detection and Interrupt Signals
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NCN6000
CRD_DET Input Voltage (card extracted)
Digital Filter Delay
INTERRUPT
Chip Select Acknowledge or Clear Interrupt
Figure 12. Card Extraction Detection and Interrupt Signals
When the card is extracted, the CRD_DET signal
Note: since the internal pull up resistor is relatively high
(500 kꢂ typical), one must use a 10 Mꢂ input impedance
probe to read this signal.
generates an interrupt, assuming the positive pulse width is
longer than the digital filter. The oscillogram, Figure 12,
depicts the behavior for a Normally Open switch.
CRD_DET Input Voltage (card inserted)
INTERRUPT
Chip Select
Figure 13. Interrupt Acknowledgement During a Card Insertion Detection Sequence
The interrupt signal, provided pin 9, is cleared by a
on the internal behavior of the NCN6000, but will be
automatically cleared when the DC−DC will be activated by
the MPU (CS=L, PWR_ON = Positive High transition)
positive going Chip Select signal as depicted by the
oscillogram, Figure 13. The CS pulse width is irrelevant, as
long as it is larger than 2.0 ꢀ s, to activate a different
sequence. Leaving the interrupt signal Low has no influence
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NCN6000
Power Management
is maintained whatever be the logic level presents on Chip
Select, pin 6.
The purpose of the power management is to activate the
circuit functions needed to run a given mode of operation,
yielding a minimum current consumption on the Vbat
supply. In the Standby mode (PWR_ON = L), the power
management provides energy to the card detection circuit
only. All the card interface pins are forced to ground
potential.
In the event of a power up request coming from the
external MPU (PWR_ON = H, CS = L), the power manager
starts the DC−DC converter.
At the end of the transaction, asserted by the MPU
(PWR_ON = L, CS = L), or under a card extraction, the
ISO7816−3 power down sequence takes place:
CRD_RST
⇒CRD_CLK
⇒CRD_IO
⇒CRD_VCC
When CS = H, the bi−directional I/O line (pins 8 and 15)
is forced into the High impedance mode to avoid signal
collision with any data coming from the external MPU.
The CRD_VCC voltage is controlled by means of CS and
PWR_ON logic signal as depicted in Figure 14. The
PWR_ON logic level define the CRD_VCC voltage status,
the amplitude being the one pre programmed into the chip.
In order to avoid uncontrolled command applied to the
smart card, the NCN6000 internal logic circuit, together
with the Vbat monitoring, clamps the card outputs until the
CRD_VCC voltage reaches the minimum value. During the
CRD_VCC slope, all the card outputs are kept Low and no
spikes can be write to the smart card. The oscillogram on the
right hand side is a magnification of the curves given on the
opposite side.
When the CRD_VCC voltage reaches the programmed
value (3.0 V or 5.0 V), the circuit activates the card signals
according to the following sequence:
CRD_VCC
⇒CRD_IO
⇒CRD_CLK
⇒CRD_RST
The logic level of the data lines are asserted High or Low,
depending upon the state forced by the external MPU, when
the start up sequence is completed. Under no situation the
NCN6000 shall launch automatically a smart card ATR
sequence. Assuming PWR_ON = H, the CRD_VCC voltage
CS
PWR_ON
CRD_VCC
2 ms
250 ꢀ s
CRD_VCC Rise Time
CRD_VCC No Change
CRD_VCC Power Down Fall Time
CRD_VCC No Change
Figure 14. Card Power Supply Control
CRD_VCC
5.0 V
5.0 V
CRD_VCC
CRD_RST
CRD_RST
CRD_CLK
CP = 15 pF
CRD_CLK
CP = 15 pF
CRD_IO
CRD_IO
Figure 15. Smart Card Signals Sequence at Power On
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NCN6000
Vbat Supply Voltage Monitoring
3.30 V
2.80 V
The built−in comparator, associated with the band gap
reference, continuously monitors the +Vbat input. During
the start up, all the NCN6000 functions are deactivated and
no data transfer can take place. When the +Vbat voltage rises
above 2.35 V (typical), the chip is activated and all the
functions becomes available. The typical behavior is
provided here after Figure 16. At this point, the internal
Power On Reset signal is activated (not accessible
externally) and all the logic signals are forced into the states
as defined by Table 3.
2.35 V
2.25 V
Vbat
Vbat_OK
Vbat STATUS
Note: Drawing is not to scale and voltages are typical.
See specifications data for details.
If the +Vbat voltage drops below 2.25 V (typical) during
the operation, the NCN6000 generate a Power Down
sequence and is forced in a no operation mode. The built−in
100 mV (typical) hysteresis avoids unstable operation when
the battery voltage slowly varies around the 2.30 V.
On the other hand, the microcontroller can read the
STATUS signal, pin 5, to control the state of the battery prior
to launch either a NCN6000 programming or an ATR
sequence (Table 4).
Figure 16. Typical Vbat Monitoring
DC−DC Converter Operation
The built−in DC−DC converter is based on a modified
boost structure to cover the full battery and card operating
voltage range. The built−in battery voltage monitor provides
an automatic system to accommodate the mode of operation
whatever be the Vbat and CRD_VCC voltages. Comparator
U3/Figure 17 tracks the two voltages and set up the
operating mode accordingly.
V
bat
V
bat
20
19
+
−
Current Sense
U1
R1 1R
V
bat
L
out_H
−
V
/V Comparator
bat CC
GND
U3
+
L2
22 ꢀ H
GND
L
out_L
PWR_ON
3 V/ 5 V
MOS Drive
18
15
Substrat Bias
CRD_VCC
C1
+
Q2
Overload
VCC_OK
NMOS Gate Drive
Q1
R2
R3
GND
GND
PMOS Gate Drive
Voltage Regulation
Q4
V
bat
V
ref
−
U2
R4
Q3
+
GND
GND
V _3/5 V
ref
GND
V _3_5
out
PWR_GND
17
Active Pull Down
GND
Figure 17. Basic DC−DC Structure
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NCN6000
When the input voltage Vbat is lower than the
oscillogram, Figure 18, depicts the DC−DC behavior under
these two modes of operation.
Beside the DC−DC converter, NMOS Q4 provides a low
impedance to ground during the Power Down sequence,
yielding the 250 ꢀ s maximum switch time depicted in the
data sheet.
programmed CRD_VCC, the system operates under the
boost mode, providing the voltage regulation and current
limit to the smart card. In this mode, the external inductor,
typically 22 ꢀ H, stores the energy to drive the +5.0 V card
supply from the external low voltage battery. The
8
25°C
POWER_ON
Ibat
7
−25°C
6
5
4
3
85°C
2
I
L
1
0
CRD_VCC
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Vbat (V)
Step Down Mode
DC Operating Current @ CRD_VCC = 5.0 V
CRD_VCC 5 V Step Up Mode
Figure 18. DC−DC Operating Modes
Figure 19. Typical DC Operating Current
When the input voltage Vbat is higher than the
programmed CRD_VCC, the system operates under a step
down mode, yielding the voltage regulation and current
limit identical to the boost mode. In this case, the built−in
structure turns Off Q1 and inverts the Q2 substrate bias to
control the current flowing to the load.These operations are
fully automatic and transparent for the end user.
The High and Low limits of the current flowing into the
external inductor L1 are sensed by the operational amplifier
U1 associated with the internal shunt R1. Since this shunt
resistor is located on the hot side of the inductor, the device
reads both the charge and discharge of the inductor,
providing a clean operation of the converter.
The standard electrolytic capacitors have the low cost
advantage for a relative high micro farad value, but have
poor tolerance, high leakage current and high ESR.
The tantalum type brings much lower leakage current
together with high capacity value per volume, but cost can
be an issue and ESR is rarely better than 500 mꢂ.
The new ceramic type have a very low leakage together
with ESR in the 50 mꢂ range, but value above 10 ꢀ F are
relatively rare. Moreover, depending upon the low cost
ceramic material used to build these capacitors, the thermal
coefficient can be very bad, as depicted in Figure 20. The
X7R type is highly recommended to achieve low voltage
ripple.
In order to optimize the DC−DC power conversion
efficiency, it is recommended to use external inductor with
R < 2.0 ꢂ.
100%
15%
The output capacitor C1 stores the energy coming from the
converter and smooths the CRD_VCC voltage applied to the
external card. At this point, care must be observed, beside the
micro farad value, to select the right type of capacitor.
According to the capacitor’s manufacturers, the internal ESR
can range from a low 10 mꢂ to more than 3.0 ꢂ, thus yielding
high losses during the DC−DC operation, depending upon the
technology used to build the capacitor.
−25°C
+25°C
+85°C
Figure 20. Typical Y7R Ceramic Type Value as a
Function of the Temperature.
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NCN6000
Based on the experiments carried out during the
NCN6000 characterization, the best comprise, at time of
printing this document, is to use two
6.8 ꢀ F/10 V/Ceramic/X7R capacitor in parallel to achieve
the CRD_VCC filtering. The ESR will not extend 50 m
together with a low cost. Obviously, the capacitor must be
SMD type to achieve the extremely low ESR and ESL
necessary for this application. Figure 21 illustrates the
CRD_VCC ripple observed in the NCN6000 demo board
depending upon the type of capacitor used to filter the output
voltage.
ꢁ
ꢂ
over the temperature range and the combination of standard
parts provide an acceptable –20% to +20% tolerance,
Table 5. Ceramic/Electrolytic Capacitors Comparison
Manufacturers
MURATA
Type/Series
Format
Max Value
10 ꢀ F/6.3 V
10 ꢀ F/16 V
10 ꢀ F/10 V
10 ꢀ F/10 V
Tolerance
Typ. Z @ 500 kHz
30 mꢂ
CERAMIC/GRM225
Tantalum/594C/593C
Electrolytic/94SV
0805
+80%/−20%
VISHAY
450 mꢂ
VISHAY
−20%/+20%
−35%/+50%
400 mꢂ
Electrolytic Low Cost
2.0 ꢂ
C= 10 ꢀ F
Electrolytic or Tantalum
C= 10 ꢀ F
Ceramic
Top Trace = Electrolytic or Tantalum 10 ꢀ F
Bottom Trace = X7R 10 ꢀF ceramic
The high ripple pulse across CRD_VCC is the consequence
of the large ESR of the electrolytic capacitor.
Figure 21. CRD_VCC Ripple as a Function of the Capacitor Technology
NOTES: Rload = 100 ꢂ , Vbat = 5.0 V, CRD_VCC = 5.0 V
Cout = 10 ꢀ F/X7R, CRD_CLK = Stop High
Figure 22. External Capacitor Current Charge and
CRD_VCC Voltage Ripple.
Figure 23. CRD_VCC Voltage Ripple
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NCN6000
Clock Divider
Low. The clock input stage (CLOCK_IN) can handle a
40 MHz frequency maximum, the divider being capable to
provide a 1:8 ratio. Of course, the ratio must be defined by
the engineer to cope with the Smart Card considered in a
given application and, in any case, the output clock
[CRD_CLK] shall be limited to 20 MHz maximum signal.
In order to maximize the CLOCK_IN bandwidth, this pin
has no Schmitt trigger input. The simple associated CMOS
has a Vbat/2 threshold level. In order to minimize the dI/dt
and dV/dV developed in the CRD_CLK line, the peak
current as been internally limited to 30 mA peak (typical @
CRD_VCC = 5.0 V), hence limited the rise and fall time to
10 ns typical. Consequently, the NCN6000 fulfills the
ISO7816 specification up to 10 MHz maximum, but can be
used up to 20 MHz when the final application operates in a
limited ambient temperature range.
The main purpose of the built−in clock generator is
threefold:
1. Adapts the voltage level shifter to cope with the
different voltages that might exist between the MPU
and the Smart Card.
2. Provides a frequency division to adapt the Smart
Card operating frequency from the external clock
source.
3. Controls the clock state according to the smart card
specification.
In addition, the NCN6000 adjusts the signal coming from
the microprocessor to get the Duty Cycle window as defined
by the ISO7816−3 specification.
The logic input pins A0, A1, PGM, I/O and RESET fulfill
the programming functions when both PGM and CS are
CLOCK_IN
1
3
3
CS
2
CRD_V
CC
1
2
RESET
PGM
I/O
Clock & V
Programming
Block
Level Shifter
& Control
CC
CRD_CLK
A0
A1
+3.0 V
+5.0 V
Figure 24. Simplified Frequency Divider and Programming Functions
In order to avoid any duty cycle out of the frequency smart
card ISO7816−3 specification, the divider is synchronized
by the last flip flop, thus yielding a constant 50% duty cycle,
whatever be the divider ratio. Consequently, the output
CRD_CLK frequency division can be delayed by eight
CLOCK_IN pulses and the microcontroller software must
take this delay into account prior to launch a new data
transaction.
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NCN6000
The example given by the oscillogram here above
activated before the CRD_CLK signal has been updated.
Generally speaking, such a delay can be derived from the
maximum clock frequency provided to the interface,
keeping in mind the maximum delay is eight incoming clock
pulses.
highlights the delay coming from the internal clock duty
cycle resynchronization. In this example, the clock is
internally divided by 2 prior to be applied to the CRD_CLK
pin. Since the clock signal is asynchronous, it is up to the
programmer to make sure the next card transaction is not
Figure 25. Clock Programming Examples
The clock can be re−programmed without halting the rest
of the circuit, whatever be the new clock divider ratio. In
particular, the CRD_VCC can be applied to the card while
the clock is re−programmed.
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NCN6000
Figure 26. Command Stop Clock HIGH
The CRD_CLK signal is halted in the High logic state,
following the Chip Select positive going transition. Logic
Input conditions:
PGM = Low
RESET = Low
A0 = Low
A1 = Low
CS = Low pulsed
I/O
= Low
Figure 27. Command Stop Clock LOW
The CRD_CLK signal is halted in the Low logic state,
following the Chip Select positive going transition. Logic
Input conditions:
PGM = Low
RESET = Low
A0 = Low
A1 = Low
CS = Low, pulsed
I/O
= High
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NCN6000
Figure 28. Command Resume Clock Normal Operation
The CRD_CLK signal is resumed in the normal operation,
PGM = Low
RESET = High
A0 = Low
A1 = Low
CS = Low, pulsed
following the Chip Select positive going transition. The
previous halted state is irrelevant and the clock signal is
synchronized with the internal clock divider to avoid non
CRD_CLK 50% duty cycle.
I/O
= Low
CRD_CLK
C3 Rise
CRD_CLK
C3 Fall
8.255 ns
7.900 ns
Cp = 30 pF
Cp = 30 pF
Figure 29. Card Clock Rise and Fall Time
Since the CRD_CLK signal can generate very fast
transient (i.e. tr = 2.5 ns @ Cp = 10 pF), adapting the design
to cope with the EMV noise specification might be
necessary at final check out. Using an external RC network
is a way to reduce the dv/dt, hence the EMI noise.
Typically, the external series resistor is 10 ꢂ, the total
capacitance being 30 pF to 50 pF
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NCN6000
Bidirectional Level Shifter
mechanism is useful to force the CRD_IO card pin in either
a High or a Low pre−defined logic state. It is the responsibility
of the programmer to set up the I/O line according to the
system’s activity
Device Q4 provides a low impedance to ground when the
CRD_IO line is deactivated. This mechanism avoids noise
presence on this line during any of the power operation.
When either side of this level shifter is forced to Low, the
externally connected device will be forward biased by the DC
current flowing through the pull up resistors as depicted in
The NCN6000 carries out the voltage difference between
the MPU and the Smart Card I/O signals. When the start
sequence is completed, and if no failures have been detected,
the device becomes essentially transparent for the data
transferred on the I/O line. To fulfill the ISO7816−3
specification, both sides of the I/O line have built in pulsed
circuitry to accelerate the signal rise transient. The I/O line is
connected on both side of the interface by a NMOS switch
which provide the level shifter and, due to its relative high
internal impedance, protects the Smart Card in the event of
data collision. Such a situation could occurs if either the MPU
of the smart card forces a signal in the opposite logic level
direction.
Figure 30. Since these two resistors will carry 350ꢁ ꢀA max
each under the worst case conditions, care must be observed
to make sure the external device will be capable to handle this
level of current. Note: the typical series impedance of the
internal MOS device (Q3, Figure 30) is 400 ꢂ.
The oscillograms in Figure 31 give the worst case operation
when the stray capacitance is 15 pF.
When the CS signal goes High, or if the MPU is running
any of the programming functions, the built in register holds
the previous state presents on the input I/O pin. This
V
CRD_VCC
bat
Q1
Q2
20 k
I/O
20 k
I/O
200 ns
200 ns
CRD_IO
Q4
Q3
CRD_IO
CARD ENABLE
Seq 1
LOGIC
GND
CRD_VCC = 5.0 V
Figure 30. Basic Internal I/O Level Shifter
Figure 31. Typical CRD_IO Rise Time
CRD_VCC
CRD_VCC = 3.0 V
I/O Card
Answer
Request Sends on
CRD_RST Line
NCN6000
Chip Select
Note: The I/O data depends solely upon the smart card ATR
content, the NCN6000 being not involved in these data.
Figure 32. Typical I/O and RST Signals During an ATR Sequence.
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NCN6000
Input Schmitt Triggers
The CLOCK_IN pin has been design to provide a 40 MHz
bandwidth clock receiver input, capable to drive the internal
clock divider. This front end circuit yields a constant Duty
Cycle signal, according to the ISO specification, to the
external smart card, even when the NCN6000 division ratio
is 1:1.
All the Logic Input pins have built−in Schmitt trigger
circuits to prevent the NCN6000 against uncontrolled
operation. The typical dynamic characteristics of the related
pins are depicted in Figure 33.
The output signal is guaranteed to go High when the input
voltage is above 0.70*Vbat, and will go Low when the input
voltage is below 0.30*Vbat.
Output
V
bat
ON
OFF
Input
V
bat
Figure 33. Typical Schmitt Trigger Characteristic
Interrupt Function
The NCN6000 flags the external microprocessor by pulling down the INT signal provided in pin 9. This signal is activated
by one of the here below referenced operations.
Table 6. Interrupt Functions
Pin Related
Clear Function
STATUS Pin 5
High = Card Presents
Card Insertion and
Extraction
11
Positive Going Chip Select, or logical
combination of Chip Select Low and
PWR_ON Positive Going
Low = No Card Inserted
DC−DC Converter
Overloaded
15
Positive Going Chip Select, or logical
combination of Chip Select Low and
PWR_ON Positive Going
High = DC−DC Operates Normally
Low = Output CRD_VCC Overloaded
Leaving the INT pin Low has no influence on the
NCN6000 internal behavior. It is up to the engineering to
decide when and how the interrupt will be cleared from this
pin. As described before, this can be achieved by either
providing a Chip Select positive transient, or by starting the
DC−DC converter with the standard command PWR_ON =
H and CS =L.
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NCN6000
Security Features
Since there is one single I/O line to communicate with the
external microcontroller, one should provide a software
routine to save the code when data exchanged are performed
between the two cards. Generally speaking, the internal
microcontroller RAM can be used to support such a
transaction.
The CRD_VCC voltage and CRD_CLK signal of each
NCN6000 can be operated simultaneously, these two pins
being activated even when the related chip select is High. As
depicted in Figure 14, the DC−DC converter is not
deactivated when PWR_ON goes to Low when CS = High.
In order to protect both the interface and the external smart
card, the NCN6000 provides security features to prevent
catastrophic failures as depicted here after.
Pin Current Limitation: In the case of a short circuit to
ground, the current forced by the device is limited to 15 mA
for any pins, except CRD_CLK pin. No feedback is
provided to the external MPU.
DC−DC Operation: The internal circuit continuously
senses the CRD_VCC voltage and, in the case of either over
or undervoltage situation, update the STATUS register
accordingly. This register can be read out by the MPU.
Battery Voltage: Both the Over and Undervoltage are
detected by the NCN6000, a POWER_DOWN sequence
and the STATUS register being updated accordingly. The
external MPU can read the STATUS pin to take whatever is
appropriate to cope with the situation.
Minimum Power Consumption
To achieve a minimum current consumption, the interface
shall be programmed as follow:
1. Turn off the DC−DC converter : this will
disconnect the smart card if still inserted in the
socket), reducing the power supply to the
minimum needed to control the interface.
2. Force the input signals to a logic High to avoid
current flowing through the pull up resistors. This
applies to the here below table:
ESD Protection
The NCN6000 includes silicon devices to protect the pins
against the ESD spikes voltages. To cope with the different
ESD voltages developed across these pins, the built−in
structures have been designed to handle either 2.0 kV, when
related to the microcontroller side, or 8.0 kV when
connected with the external contacts. Practically, the
CRD_RST, CRD_CLK, CRD_IO and CRD_DET pins can
sustain 8 kV, the digital pins being capable to sustain 2 kV.
The CRD_VCC pin has the same 8 kV ESD protection, but
can source up to 55 mA continuously, the absolute
maximum current being 100 mA.
To save as much battery current as possible when no card
is inserted, one should use a Normally Open Card Detection
switch connected pin 11. Since the internal card detection
circuit source 10 ꢀ A (typical) to bias the switch, using a
Normally Open avoid this direct sink to ground from the
battery.
INT
Pin 9
Pin 6
Pin 5
Pin 8
Pin 14
CS
STATUS
I/O
CRD_IO
To save as much battery current as possible when no card
is inserted, one should use a Normally Open Card Detection
switch connected pin 11 to ground. Since the internal card
detection circuit source is 10 ꢀ A (typical), using such a NO
switch saves the direct sink to ground current from the
battery to ground.
During this mode of operation, the only active sub
functions are the card detection and the battery monitoring.
The activity resume immediately after either a card
insertion, or a CS = Low signal applied to pin 6.
Parallel Operation
When two or more NCN6000 operate in parallel on a
common digital bus, the Chip Select pin allows the selection
of one chip from the bank of the paralleled devices. Of
course, the external MPU shall provide one unique CS line
for each of the NCN6000 considered interfaces. When a
given interface is selected by CS = L, all the logic inputs
becomes active, the chip can be programmed or/and the
external card can be accessed. When CS = H, all the input
logic pins are in the high impedance state, thus leaving the
bus available for other purpose. On the other hand, when
CS = H, the CRD_IO and CRD_RST hold the previous I/O
and RESET logic state, the CRD_CLK being either active
or stopped, according to the programmed state forced by the
MPU.
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NCN6000
Printed Circuit Board Layout
The card socket uses a low cost ISO only version, all the
parts being located on the Component side. Connector J3
makes reference to the microcontroller used by the final
application. Of course, the connector is not necessary and
standard copper tracks might be used to connect the MPU to
the NCN6000 interface chip.
Since the NCN6000 carries high speed currents together
with high frequency clock, the printed circuit board must be
carefully designed to avoid the risk of uncontrolled
operation of the interface.
A typical single−sided PCB layout is provided in
Figure 34 highlighting the ground technique.
2335 mis (60 mm)
SMARTCARD ISO CONTACTS
MPU
C4
CLK
C8
I/O
RST
V
PP
GND
GROUND
Figure 34. Typical Single Sided Printed Circuit Board Layout
Application Note
been observed to minimize the cross coupling between the
clock signals (both Input and CRD_CLK) and the other
signals presents on the board.
The microcontroller holds the software necessary to
program the NCN6000, together with the code handling the
A partial schematic diagram of the demo board designed
to support the NCN6000 applications is depicted in
Figure 35. This schematic diagram highlights the interface
between the microcontroller and the Smart Card, leaving
aside the peripherals used to control the MPU.
T0 operation. Provisions are made to provide
a
communication link with an external computer by using the
RS232 standard port.
Conclusion
Due to the Chip Select signal, several NCN6000 can share
a common data bus as depicted in Figure 36. In this example,
two interfaces are connected to a single MPU, the CS pins
being controlled by two different signals.
From a practical stand point, the CRD_VCC output
capacitor has been split into two 6.8 ꢀ F/10 V/X7R, one
being located as close as possible across pins 13 and 17 of
the NCN6000, the second one being located close by the
smart card physical connector. On the other hand, care has
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NCN6000
VCC
GND
GND
C7
C1
C6
22 pF
22 pF
10 ꢀ F/6.3 V
Y1
C2
8 MHz
GND
VCC
0.1 ꢀ F/25 V
C1
R1 10k
R6
VCC
10 M
0.1 ꢀ F/25 V
C2
1
29
28
GND
U1
PA4
10 ꢀ F/6.3 V
PA5
PA6
PA7
9
I/O
27
30
1
2
3
4
5
6
7
8
9
20
PC0
A0
V
10 A0
bat
PC1
PC2
PC3
PC4
PC5
PC6
PC7
19
11 A1
A1
L
out_H
L1
22 ꢀ H
43
45
47
49
12 RESET
13 PGM
PE0
PE1
PGM
PWR_ON
STATUS
CS
18
L
out_L
U1
68HC11E9
PWR_ON
14
15
16
PE2
PE3
PE4
17
16
PWR_GND
GROUND
CS
44
46
48
50
GND
15
PE5
R7 4.7k
RESET
I/O
CRD_V
20
19
CC
VCC
XIRQ
IRQ
14
13
12
11
PE6
PE7
CRD_IO
CRD_CLK
CRD_RST
INT
CLK
INT
35
36
37
38
5
PB7
PB6
10
E
PD0/RXD
PD1/TD
PD2
CLOCK_IN
CRD_DET
20
21
22
23
24
NCN6000
PB5
PB4
PB3
39
40
41
42
J2
PD3
ISO7816
PB2
PB1
PB0
PD4
8
25 STATUS
C8
PD5
7
6
5
I/O
VPP
GND
VCC
VCC
VCC
R8
4.7k
R10
4.7k
R9
4.7k
R14
4
GND
C4
VCC
1
C4
CLK
RST
VCC
Swb
Swa
10 R
0.1 ꢀ F/25 V
3
S?
2
1
R20
RESET
GND
18
17
4.7 k
3
SW DIP−2
1 = Mode B
2 = Mode A
IN
R21
GND
VCC
SMARTCARD_B
4.7 k
GND
2
U5
MC34164
GND
C10
4.7 ꢀ F/10 V
C9
R16
220 R
4.7 ꢀ F/10 V
C11
2.2 ꢀ F
16 V
R16
220 R
GND
SW13
RESET
GND
Figure 35. NCN6000 Single Interface Demo Board
http://onsemi.com
33
NCN6000
VCC
C1
GND
GND
C6
22 pF
C7
22 pF
10 ꢀ F/6.3 V
Y1
8 MHz
C2
GND
VCC
0.1 ꢀ F/25 V
C1
R2 10k
R6
10 M
VCC
1
0.1 ꢀ F/25 V
C2
29
28
GND
PA4
10 ꢀ F/6.3 V
PA5
PA6
PA7
9
I/O
27
30
U1
1
2
3
4
5
6
7
8
9
20
PC0
A0
V
10 A0
11 A1
12 RESET
13 PGM
bat
PC1
PC2
PC3
PC4
PC5
PC6
PC7
NCN6000
19
A1
L
out_H
L1
22 ꢀ H
43
45
47
49
PE0
PE1
PGM
18
L
out_L
PWR_ON
STATUS
CS
U1
68HC11E9
14 PWR_ON
15
PE2
PE3
PE4
17
16
PWR_GND
GROUND
16 CS
44
46
48
50
GND
R5 4.7k
20
15
PE5
RESET
I/O
XIRQ
IRQ
CRD_V
CC
VCC
14
13
12
11
PE6
PE7
19
CRD_IO
CRD_CLK
CRD_RST
CRD_DET
INT
INT
35
36
37
38
5
PB7
PB6
PB5
10
E
PD0/RXD
PD1/TD
PD2
CLOCK_IN
20
21
22
23
24
25
8
7
6
5
J2
C8
PB4
PB3
39
40
41
42
I/O
VPP
GND
PD3
PB2
PB1
PB0
PD4
PD5
STATUS
VCC
4
VCC
R7
C4
CLK
RST
VCC
Swb
Swa
GND
3
VCC
2
R6
4.7k
4.7k
1
R4
4.7k
R8
10 R
C5
18
17
VCC
1
0.1 ꢀ F/25 V
S1
R9
4.7 k
GND
RESET
GND
3
GND
CLK
SW DIP−2
1 = Mode B
2 = Mode A
IN
R10
GND
4.7 k
2
U5
R16
220 R
GND
MC34164
ISO7816
SMARTCARD_B
C11
2.2 ꢀ F
16 V
R16
220 R
SW13
RESET
GND
C10 4.7 ꢀ F/10 V
C9 4.7 ꢀ F/10 V
GND
GND
Figure 36. NCN6000 Single Interface Demo Board
http://onsemi.com
34
NCN6000
Figure Index
Summary
Fig. #
Title
Simplified Application Diagram
Typical Application Diagram
Block Diagram
Page
Subject
Page
6
1
2
3
4
1
2
3
4
PIN FUNCTIONS AND DESCRIPTION
MAXIMUM RATINGS
8
POWER SUPPLY SECTION
9
Programming and Normal Operation Basic
Timing
DIGITAL PARAMETERS SECTION
SMART CARD INTERFACE SECTION
PROGRAMMING AND STATUS FUNCTIONS
10
11
12
13
5
6
Interrupt Servicing and Card Polling
5
Card Power Supply Turn ON and OFF
Timing
14
CARD VCC, CARD CLOCK AND CARD
DETECTION POLARITY PROGRAMMING
7
8
9
Operating Modes Flow Chart
15
16
18
Minimum Programming Timings
DC−DC CONVERTER AND CARD DETECTOR
STATUS
14
Typical Power Down Sequence in the
NCN6000 Interface
CARD POWER SUPPLY TIMINGS
BASIC OPERATING MODE FLOW CHART
STANDBY MODE
14
15
15
16
16
17
17
17
19
21
22
22
25
29
30
30
31
31
31
31
32
32
36
32
10
11
Power Down Sequence Details
18
19
Card Insertion Detection and Interrupt
Signals
PROGRAMMING MODE
12
13
Card Extraction Detection and Interrupt
Signals
20
20
ACTIVE MODE
Interrupt Acknowledgement during a Card
Insertion Detection Sequence.
TRANSACTION MODE
IDLE MODE
14
15
16
17
18
19
20
Card Power Supply Control
Smart Card Signals Sequence at Power On
Typical Vbat Monitoring
21
21
22
22
23
23
23
CARD POWER DOWN MODE
CARD DETECTION
POWER MANAGEMENT
VBAT SUPPLY VOLTAGE MONITORING
DC−DC CONVERTER OPERATION
CLOCK DIVIDER
Basic DC−DC Structure
DC−DC Operating Modes
Typical DC Operating Current
Typical Y7R Ceramic Type Value as a
Function of the Temperature.
BIDIRECTIONNAL LEVEL SHIFTER
INPUT SCHMITT TRIGGERS
INTERRUPT FUNCTIONS
SECURITY FEATURES
21
22
CRD_VCC Ripple as a Function of the
Capacitor Technology
24
24
External Capacitor Current Charge and
CRD_VCC Voltage Ripple
23
24
CRD_VCC Voltage Ripple
24
25
ESD PROTECTION
Simplified Frequency Divider and
Programming Functions
MULTI CARD PARALLEL OPERATION
MINIMUM POWER CONSUMPTION
PRINTED CIRCUIT BOARD LAYOUT
APPLICATION NOTE
25
26
27
28
29
30
31
32
Clock Programming Examples
Command Stop Clock HIGH
26
27
27
28
28
29
29
29
Command Stop Clock LOW
Command Resume Clock Normal Operation
Card Clock Rise and Fall Time
Basic internal I/O Level Shifter
Typical CRD_IO Rise Time
PACKAGE OUTLINE DIMENSIONS
CONCLUSION
Typical I/O and RST Signals During an ATR
Sequence
33
34
Typical Schmitt Trigger Characteristic
30
32
Typical Single Sided Printed Circuit Board
Layout
35
36
NCN6000 Single Interface Demo Board
Typical Dual Interface Application
33
34
http://onsemi.com
35
NCN6000
PACKAGE DIMENSIONS
TSSOP−20
DTB SUFFIX
CASE 948E−02
ISSUE B
NOTES:
20X K REF
1. DIMENSIONING AND TOLERANCING
PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION:
MILLIMETER.
M
S
S
V
0.10 (0.004)
T
U
S
U
0.15 (0.006) T
K
3. DIMENSION A DOES NOT INCLUDE
MOLD FLASH, PROTRUSIONS OR GATE
BURRS. MOLD FLASH OR GATE BURRS
SHALL NOT EXCEED 0.15 (0.006) PER
SIDE.
4. DIMENSION B DOES NOT INCLUDE
INTERLEAD FLASH OR PROTRUSION.
INTERLEAD FLASH OR PROTRUSION
SHALL NOT EXCEED 0.25 (0.010) PER
SIDE.
K1
20
11
2X L/2
J J1
B
L
−U−
PIN 1
IDENT
SECTION N−N
5. DIMENSION K DOES NOT INCLUDE
DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.08
(0.003) TOTAL IN EXCESS OF THE K
DIMENSION AT MAXIMUM MATERIAL
CONDITION.
1
10
0.25 (0.010)
N
S
0.15 (0.006) T
U
6. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
7. DIMENSION A AND B ARE TO BE
DETERMINED AT DATUM PLANE −W−.
M
A
−V−
N
MILLIMETERS
INCHES
DIM MIN
MAX
6.60
4.50
1.20
0.15
0.75
MIN
MAX
0.260
0.177
F
A
B
6.40
4.30
−−−
0.252
0.169
DETAIL E
C
−−− 0.047
0.006
0.030
D
0.05
0.50
0.002
0.020
−W−
F
C
G
H
0.65 BSC
0.026 BSC
0.27
0.09
0.09
0.19
0.19
0.37
0.20
0.16
0.30
0.25
0.011
0.004
0.004
0.007
0.007
0.015
0.008
0.006
0.012
0.010
J
G
D
J1
K
H
DETAIL E
0.100 (0.004)
−T− SEATING
K1
L
6.40 BSC
0.252 BSC
0
M
0
8
8
_
_
_
_
PLANE
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to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
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NCN6000/D
相关型号:
NCN6001MUR2G
SPECIALTY INTERFACE CIRCUIT, PBCC20, 6 X 5 MM, 0.80 MM PITCH, LEAD FREE, LLGA-20
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