24C02SCWF08 [ETC]
I2C Serial EEPROM ; I2C串行EEPROM\n型号: | 24C02SCWF08 |
厂家: | ETC |
描述: | I2C Serial EEPROM
|
文件: | 总12页 (文件大小:167K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
24C01SC/02SC
1K/2K 5.0V I2C™ Serial EEPROMs for Smart Cards
FEATURES
DIE LAYOUT
• ISO Standard 7816 pad locations
• Low power CMOS technology
VSS
- 1 mA active current typical
VCC
SCL
- 10 µA standby current typical at 5.5V
• Organized as a single block of 128 bytes (128 x 8)
or 256 bytes (256 x 8)
• 2-wire serial interface bus, I2C™ compatible
• 100 kHz and 400 kHz compatibility
• Self-timed write cycle (including auto-erase)
• Page-write buffer for up to 8 bytes
• 2 ms typical write cycle time for page-write
• ESD protection > 4 kV
SDA
DC
BLOCK DIAGRAM
• 1,000,000 E/W cycles guaranteed
• Data retention > 200 years
HV GENERATOR
• Available for extended temperature ranges
- Commercial (C):
0°C to +70°C
I/O
CONTROL
LOGIC
MEMORY
CONTROL
LOGIC
EEPROM
ARRAY
XDEC
DESCRIPTION
PAGE LATCHES
The Microchip Technology Inc. 24C01SC and
24C02SC are 1K-bit and 2K-bit Electrically Erasable
PROMs with bondpad positions optimized for smart
card applications. The devices are organized as a sin-
gle block of 128 x 8-bit or 256 x 8-bit memory with a
two-wire serial interface. The 24C01SC and 24C02SC
also have page-write capability for up to 8 bytes of data.
SDA SCL
YDEC
VCC
VSS
SENSE AMP
R/W CONTROL
I2C is a trademark of Philips Corporation.
1999 Microchip Technology Inc.
DS21170D-page 1
This Material Copyrighted by Its Respective Manufacturer
24C01SC/02SC
TABLE 1-1:
PAD FUNCTION TABLE
1.0
ELECTRICAL CHARACTERISTICS
Name
VSS
Function
1.1
Maximum Ratings*
Ground
VCC...................................................................................7.0V
All inputs and outputs w.r.t. VSS ............... -0.6V to VCC +1.0V
Storage temperature .....................................-65°C to +150°C
Ambient temp. with power applied ................-65°C to +125°C
ESD protection on all pads............................................ Š4 kV
SDA
SCL
VCC
DC
Serial Address/Data I/O
Serial Clock
+4.5V to 5.5V Power Supply
Don’t connect
*Notice: Stresses above those listed under “Maximum ratings”
may cause permanent damage to the device. This is a stress rat-
ing only and functional operation of the device at those or any
other conditions above those indicated in the operational listings
of this specification is not implied. Exposure to maximum rating
conditions for extended periods may affect device reliability.
TABLE 1-2:
DC CHARACTERISTICS
VCC = +4.5V to +5.5V
Commercial (C): Tamb = 0°C to +70°C
Parameter
Symbol
Min.
Max.
Units
Conditions
SCL and SDA pads:
High level input voltage
VIH
VIL
.7 VCC
—
—
.3 VCC
—
—
V
Low level input voltage
Hysteresis of Schmidt trigger inputs
Low level output voltage
VHYS
VOL
ILI
.05 VCC
—
V
(Note)
.40
10
V
IOL = 3.0 mA, VCC = 4.5V
VIN = .1V to 5.5V
Input leakage current (SCL)
Output leakage current (SDA)
Pin capacitance (all inputs/outputs)
-10
µA
µA
pF
ILO
-10
10
VOUT = .1V to 5.5V
CIN,
—
10
VCC = 5.0V (Note 1)
COUT
Tamb = 25°C, FCLK = 1 MHz
Operating current
ICC Write
ICC Read
ICCS
—
—
—
3
1
mA
mA
µA
VCC = 5.5V
Vcc = 5.5V, SCL = 400 KHz
VCC = 5.5V, SDA = SCL = VCC
Standby current
100
Note:
This parameter is periodically sampled and not 100% tested.
FIGURE 1-1: BUS TIMING START/STOP
VHYS
SCL
THD:STA
TSU:STA
TSU:STO
SDA
START
STOP
DS21170D-page 2
1999 Microchip Technology Inc.
This Material Copyrighted by Its Respective Manufacturer
24C01SC/02SC
TABLE 1-3:
AC CHARACTERISTICS
Parameter
Symbol
Min.
Max.
Units
Remarks
Clock frequency
FCLK
THIGH
TLOW
TR
—
600
1300
—
400
—
kHz
ns
Clock high time
Clock low time
—
ns
SDA and SCL rise time
SDA and SCL fall time
START condition hold time
300
300
—
ns
(Note 1)
(Note 1)
TF
—
ns
THD:STA
600
ns
After this period the first clock
pulse is generated
START condition setup time
TSU:STA
600
—
ns
Only relevant for repeated
START condition
Data input hold time
Data input setup time
STOP condition setup time
Output valid from clock
Bus free time
THD:DAT
TSU:DAT
TSU:STO
TAA
0
—
—
ns
ns
ns
ns
ns
(Note 2)
100
600
—
—
900
—
(Note 2)
TBUF
1300
Time the bus must be free
before a new transmission can
start
Output fall time from VIH
minimum to VIL maximum
TOF
TSP
20 +0.1
CB
250
50
ns
ns
(Note 1), CB ð 100 pF
Input filter spike suppression
(SDA and SCL pins)
—
(Note 3)
Write cycle time
Endurance
TWR
—
10
—
ms
Byte or Page mode
—
cycles 25°C, Vcc = 5V, Block Mode
(Note 4)
1M
Note 1: Not 100% tested. CB = total capacitance of one bus line in pF.
2: As a transmitter, the device must provide an internal minimum delay time to bridge the undefined region
(minimum 300 ns) of the falling edge of SCL to avoid unintended generation of START or STOP conditions.
3: The combined TSP and VHYS specifications are due to new Schmitt trigger inputs which provide improved
noise spike suppression. This eliminates the need for a TI specification for standard operation.
4: This parameter is not tested but guaranteed by characterization. For endurance estimates in a specific
application, please consult the Total Endurance Model which can be obtained on our website.
FIGURE 1-2: BUS TIMING DATA
TR
TF
THIGH
TLOW
SCL
TSU:STA
THD:DAT
TSU:DAT
TSU:STO
THD:STA
SDA
IN
TSP
TAA
THD:STA
TAA
TBUF
SDA
OUT
1999 Microchip Technology Inc.
DS21170D-page 3
This Material Copyrighted by Its Respective Manufacturer
24C01SC/02SC
3.4
Data Valid (D)
2.0
FUNCTIONAL DESCRIPTION
The 24C01SC/02SC supports a bi-directional two-wire
bus and data transmission protocol. A device that
sends data onto the bus is defined as transmitter, and
a device receiving data as receiver. The bus has to be
controlled by a master device which generates the
serial clock (SCL), controls the bus access, and gener-
ates the START and STOP conditions, while the
24C01SC/02SC works as slave. Both master and slave
can operate as transmitter or receiver, but the master
device determines which mode is activated.
The state of the data line represents valid data when,
after a START condition, the data line is stable for the
duration of the HIGH period of the clock signal.
The data on the line must be changed during the LOW
period of the clock signal. There is one clock pulse per
bit of data.
Each data transfer is initiated with a START condition
and terminated with a STOP condition. The number of
the data bytes transferred between the START and
STOP conditions is determined by the master device
and is theoretically unlimited, although only the last 16
will be stored when doing a write operation. When an
overwrite does occur, it will replace data in a first in first
out fashion.
3.0
BUS CHARACTERISTICS
The following bus protocol has been defined:
• Data transfer may be initiated only when the bus
is not busy.
• During data transfer, the data line must remain
stable whenever the clock line is HIGH. Changes
in the data line while the clock line is HIGH will be
interpreted as a START or STOP condition.
3.5
Acknowledge
Each receiving device, when addressed, is obliged to
generate an acknowledge after the reception of each
byte. The master device must generate an extra clock
pulse which is associated with this acknowledge bit.
Accordingly, the following bus conditions have been
defined (Figure 3-1).
Note: The 24C01SC/02SC does not generate
any acknowledge bits if an internal pro-
gramming cycle is in progress.
3.1
Bus not Busy (A)
Both data and clock lines remain HIGH.
The device that acknowledges has to pull down the
SDA line during the acknowledge clock pulse in such a
way that the SDA line is stable LOW during the HIGH
period of the acknowledge related clock pulse. Of
course, setup and hold times must be taken into
account. A master must signal an end of data to the
slave by not generating an acknowledge bit on the last
byte that has been clocked out of the slave. In this case,
the slave must leave the data line HIGH to enable the
master to generate the STOP condition.
3.2
Start Data Transfer (B)
A HIGH to LOW transition of the SDA line while the
clock (SCL) is HIGH determines a START condition. All
commands must be preceded by a START condition.
3.3
Stop Data Transfer (C)
A LOW to HIGH transition of the SDA line while the
clock (SCL) is HIGH determines a STOP condition. All
operations must be ended with a STOP condition.
FIGURE 3-1: DATA TRANSFER SEQUENCE ON THE SERIAL BUS
(A)
(B)
(D)
(D)
(C)
(A)
SCL
SDA
START
CONDITION
ADDRESS OR
ACKNOWLEDGE
VALID
DATA
ALLOWED
TO CHANGE
STOP
CONDITION
DS21170D-page 4
1999 Microchip Technology Inc.
This Material Copyrighted by Its Respective Manufacturer
24C01SC/02SC
3.6
Slave Address
4.0
WRITE OPERATION
After generating a START condition, the bus master
transmits the slave address consisting of a 4-bit device
code (1010) for the 24C01SC/02SC, followed by three
don’t care bits.
4.1
Byte Write
Following the start signal from the master, the device
code (4 bits), the don’t care bits (3 bits), and the R/W
bit, which is a logic low, is placed onto the bus by the
master transmitter. This indicates to the addressed
slave receiver that a byte with a word address will follow
after it has generated an acknowledge bit during the
ninth clock cycle. Therefore, the next byte transmitted
by the master is the word address and will be written
into the address pointer of the 24C01SC/02SC. After
receiving another acknowledge signal from the
24C01SC/02SC, the master device will transmit the
data word to be written into the addressed memory
location. The 24C01SC/02SC acknowledges again and
the master generates a stop condition. This initiates the
internal write cycle, and during this time the
24C01SC/02SC will not generate acknowledge signals
(Figure 4-1).
The eighth bit of slave address determines if the master
device wants to read or write to the 24C01SC/02SC
(Figure 3-2).
The 24C01SC/02SC monitors the bus for its corre-
sponding slave address all the time. It generates an
acknowledge bit if the slave address was true, and it is
not in a programming mode.
Control
Code
Chip
Select
Operation
R/W
Read
Write
1010
1010
XXX
XXX
1
0
FIGURE 3-2: CONTROL BYTE
ALLOCATION
4.2
Page Write
START
READ/WRITE
The write control byte, word address, and the first data
byte are transmitted to the 24C01SC/02SC in the same
way as in a byte write. But instead of generating a stop
condition, the master transmits up to eight data bytes to
the 24C01SC/02SC, which are temporarily stored in
the on-chip page buffer and will be written into the
memory after the master has transmitted a stop condi-
tion. After the receipt of each word, the three lower
order address pointer bits are internally incremented by
one. The higher order five bits of the word address
remains constant. If the master should transmit more
than eight words prior to generating the stop condition,
the address counter will roll over and the previously
received data will be overwritten. As with the byte write
operation, once the stop condition is received an inter-
nal write cycle will begin (Figure 4-2).
R/W
X
A
SLAVE ADDRESS
1
0
1
0
X
X
X = Don’t care
Note: Page write operations are limited to writing
bytes within a single physical page, regard-
less of the number of bytes actually being
written. Physical page boundaries start at
addresses that are integer multiples of the
page buffer size (or ‘page size’) and end at
addresses that are integer multiples of
[page size - 1]. If a page write command
attempts to write across a physical page
boundary, the result is that the data wraps
around to the beginning of the current page
(overwriting data previously stored there),
instead of being written to the next page as
might be expected. It is therefore neces-
sary for the application software to prevent
page write operations that would attempt to
cross a page boundary.
1999 Microchip Technology Inc.
DS21170D-page 5
This Material Copyrighted by Its Respective Manufacturer
24C01SC/02SC
FIGURE 4-1: BYTE WRITE
S
BUS ACTIVITY
MASTER
T
A
R
T
S
T
O
P
CONTROL
BYTE
WORD
ADDRESS
DATA
SDA LINE
S
P
A
C
K
A
C
K
A
C
K
BUS ACTIVITY
FIGURE 4-2: PAGE WRITE
S
BUS ACTIVITY
MASTER
T
S
T
O
P
CONTROL
BYTE
WORD
ADDRESS (n)
A
R
T
DATA n
DATAn + 1
DATAn + 7
SDA LINE
S
P
A
C
K
A
C
K
A
C
K
A
C
K
A
C
K
BUS ACTIVITY
DS21170D-page 6
1999 Microchip Technology Inc.
This Material Copyrighted by Its Respective Manufacturer
24C01SC/02SC
5.0
ACKNOWLEDGE POLLING
6.0
READ OPERATION
Since the device will not acknowledge during a write
cycle, this can be used to determine when the cycle is
complete (this feature can be used to maximize bus
throughput). Once the stop condition for a write com-
mand has been issued from the master, the device ini-
tiates the internally timed write cycle. ACK polling can
be initiated immediately. This involves the master send-
ing a start condition followed by the control byte for a
write command (R/W = 0). If the device is still busy with
the write cycle, then NO ACK will be returned. If the
cycle is complete, then the device will return the ACK,
and the master can then proceed with the next read or
write command. See Figure 5-1 for flow diagram.
Read operations are initiated in the same way as write
operations with the exception that the R/W bit of the
slave address is set to one. There are three basic types
of read operations: current address read, random read,
and sequential read.
6.1
Current Address Read
The 24C01SC/02SC contains an address counter that
maintains the address of the last word accessed, inter-
nally incremented by one. Therefore, if the previous
access (either a read or write operation) was to
address n, the next current address read operation
would access data from address n + 1. Upon receipt of
the slave address with R/W bit set to one, the
24C01SC/02SC issues an acknowledge and transmits
the 8-bit data word. The master will not acknowledge
the transfer but does generate a stop condition and the
FIGURE 5-1: ACKNOWLEDGE POLLING
FLOW
Send
Write Command
24C01SC/02SC
(Figure 6-1).
discontinues
transmission
6.2
Random Read
Send Stop
Condition to
Random read operations allow the master to access
any memory location in a random manner. To perform
this type of read operation, first the word address must
be set. This is done by sending the word address to the
24C01SC/02SC as part of a write operation. After the
word address is sent, the master generates a start con-
dition following the acknowledge. This terminates the
write operation, but not before the internal address
pointer is set. Then, the master issues the control byte
again but with the R/W bit set to a one. The
24C01SC/02SC will then issue an acknowledge and
transmits the 8-bit data word. The master will not
acknowledge the transfer but does generate a stop
condition and the 24C01SC/02SC discontinues trans-
mission (Figure 6-2).
Initiate Write Cycle
Send Start
Send Control Byte
with R/W = 0
Did Device
NO
Acknowledge
(ACK = 0)?
YES
Next
Operation
1999 Microchip Technology Inc.
DS21170D-page 7
This Material Copyrighted by Its Respective Manufacturer
24C01SC/02SC
6.3
Sequential Read
6.4
Noise Protection
Sequential reads are initiated in the same way as a ran-
dom read except that after the 24C01SC/02SC trans-
mits the first data byte, the master issues an
acknowledge as opposed to a stop condition in a ran-
dom read. This directs the 24C01SC/02SC to transmit
the next sequentially addressed 8-bit word
(Figure 6-3).
The 24C01SC/02SC employs a VCC threshold detector
circuit which disables the internal erase/write logic if the
VCC is below 1.5 volts at nominal conditions.
The SCL and SDA inputs have Schmitt trigger and filter
circuits which suppress noise spikes to assure proper
device operation even on a noisy bus.
To provide sequential reads the 24C01SC/02SC con-
tains an internal address pointer which is incremented
by one at the completion of each operation. This
address pointer allows the entire memory contents to
be serially read during one operation.
FIGURE 6-1: CURRENT ADDRESS READ
S
T
BUS ACTIVITY
CONTROL
S
T
O
P
A
R
T
MASTER
BYTE
DATA n
SDA LINE
S
P
A
C
K
N
O
BUS ACTIVITY
A
C
K
FIGURE 6-2: RANDOM READ
S
T
A
R
T
S
T
A
R
T
S
T
O
P
CONTROL
BYTE
WORD
ADDRESS (n)
CONTROL
BYTE
BUS ACTIVITY
MASTER
DATA n
S
P
S
SDA LINE
A
C
K
A
C
K
A
C
K
N
O
BUS ACTIVITY
A
C
K
FIGURE 6-3: SEQUENTIAL READ
S
T
O
P
CONTROL
BYTE
DATA n
DATA n + 1
DATA n + 2
DATA n + X
BUS ACTIVITY
MASTER
SDA LINE
P
A
C
K
A
C
K
A
C
K
A
C
K
N
O
BUS ACTIVITY
A
C
K
DS21170D-page 8
1999 Microchip Technology Inc.
This Material Copyrighted by Its Respective Manufacturer
24C01SC/02SC
7.0
PAD DESCRIPTIONS
8.0
DIE CHARACTERISTICS
Figure 8-1 shows the die layout of the 24C01SC/02SC,
including bondpad positions. Table 8-1 shows the
actual coordinates of the bondpad midpoints with
respect to the center of the die.
7.1
SDA Serial Address/Data Input/Output
This is a bi-directional pad used to transfer addresses
and data into and data out of the device. It is an open
drain terminal, therefore the SDA bus requires a pull-up
resistor to VCC (typical 10K¾ for 100 kHz, 2 K¾ for
400 kHz).
FIGURE 8-1: DIE LAYOUT
DIP
VSS
For normal data transfer SDA is allowed to change only
during SCL low. Changes during SCL high are
reserved for indicating the START and STOP condi-
tions.
VCC
7.2
SCL Serial Clock
SDA
This input is used to synchronize the data transfer from
and to the device.
DC
SCL
7.3
DC Don’t Connect
TABLE 8-1:
BONDPAD COORDINATES
This pad is used for test purposes and should not be
bonded out. It is pulled down to VSS through an internal
resistor.
Pad Midpoint,
X dir.
Pad Midpoint,
Y dir.
Pad Name
VSS
SDA
SCL
VCC
-495.000
-605.875
479.875
605.875
749.130
-271.875
-746.625
-261.375
Note 1: Dimensions are in microns.
2: Center of die is at the 0,0 point.
1999 Microchip Technology Inc.
DS21170D-page 9
This Material Copyrighted by Its Respective Manufacturer
24C01SC/02SC
NOTES:
DS21170D-page 10
1999 Microchip Technology Inc.
This Material Copyrighted by Its Respective Manufacturer
24C01SC/02SC
24C01SC/02SC Product Identification System
To order or to obtain information (e.g., on pricing or delivery), please use the listed part numbers, and refer to the factory or the listed
sales offices.
24C01SC/02SC
—
/S
Die Thickness
Package:
Blank = 11 mils
08 = 8 mils
Other die thicknesses available, please
consult factory.
S = Die in Wafer Pak
W = Wafer
WF = Sawed Wafer on Frame
Temperature
Range:
Blank = 0°C to +70°C
Device:
24C01SC 1K 12C ISO Smart Card die
24C02SC 2K 12C ISO Smart Card die
Sales and Support
Data Sheets
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom-
mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1. Your local Microchip sales office
2. The Microchip Corporate Literature Center U.S. FAX: (602) 786-7277
3. The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.
New Customer Notification System
4. Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
1999 Microchip Technology Inc.
DS21170D-page 11
This Material Copyrighted by Its Respective Manufacturer
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11/15/99
San Jose
Microchip received QS-9000 quality system
certification for its worldwide headquarters,
design and wafer fabrication facilities in
Chandler and Tempe, Arizona in July 1999. The
Company’s quality system processes and
procedures are QS-9000 compliant for its
PICmicro® 8-bit MCUs, KEELOQ® code hopping
devices, Serial EEPROMs and microperipheral
products. In addition, Microchip’s quality
system for the design and manufacture of
development systems is ISO 9001 certified.
Microchip Technology Inc.
2107 North First Street, Suite 590
San Jose, CA 95131
Tel: 408-436-7950 Fax: 408-436-7955
All rights reserved. © 1999 Microchip Technology Incorporated. Printed in the USA. 11/99
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Information contained in this publication regarding device applications and the like is intended for suggestion only and may be superseded by updates. No representation or warranty is given and no liability is assumed
by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip’s products
as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights. The Microchip
logo and name are registered trademarks of Microchip Technology Inc. in the U.S.A. and other countries. All rights reserved. All other trademarks mentioned herein are the property of their respective companies.
1999 Microchip Technology Inc.
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