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SC23M28B の電気的特性と機能

SC23M28BのメーカーはSilan Microelectronicsです、この部品の機能は「8KBIT MEMORY CARD IC」です。


製品の詳細 ( Datasheet PDF )

部品番号 SC23M28B
部品説明 8KBIT MEMORY CARD IC
メーカ Silan Microelectronics
ロゴ Silan Microelectronics ロゴ 




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SC23M28B Datasheet, SC23M28B PDF,ピン配置, 機能
SC23M28
8K-BIT MEMORY CARD IC
DESCRIPTION
SC23M28 is a smart card module utilizing CMOS EEPROM technology.
1024 bytes main memory with write-protect function and programmable
security code. And the periphery interface is compatible with ISO7816
agreement (synchronous propagation).
FEATURES
* 1024 X 8 bit EEPROM
* Byte addressing
* Permanent write-protect for each byte
* 1024 X 1bit memory protection
* Serial three buses interface
* More than 100,000 times write endurance cycles
* Data retention of more than 10 years
ORDERING INFORMATION
* Contact definition and serial interface comply to ISO7816 specification
(synchronous propagation)
Device
Package
* 2Byte programmable security code PSC(Programmable Security SC23M28A P8-13
Code), and the data can be changed only when pass the PSC SC23M28B MCTS012106
authentication
SC23M28C P8-12
* Compatible with SLE4428
SC23M28D FPC-1
APPLICATIONS
* Used for various IC cards.
BLOCK DIAGRAM
www.DataSheet4U.com
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0 2006.07.21
Page 1 of 10

1 Page





SC23M28B pdf, ピン配列
SC23M28
PIN CONFIGURATION
VCC 1
RST 2
CLK 3
NC 4
8 GND
7 NC
6 I/O
5 NC
(Contact of the card)
PIN DESCRIPTIONS
Pin No.
1
2
3
4
5
6
7
8
Symbol
VCC
RST
CLK
NC
GND
NC
I/O
NC
I/O Description
-- Power supply voltage is 5V
I Reset signal
I Clock signal
-- No connect
-- Ground
-- No connect
I/O Data bus(open-drain output)
-- No connect
FUNCTION DESCRIPTIONS
SC23M28 provides 1024×8 bits EEPROM memory units with write-protect for each bit. Except PSC
www.DataSh(Peerto4gUr.acmommable Security Code) memory unit, all units are readable. The unit can be erased and written before the
write-protect is active, or else the unit is only readable. The bit with write-protection can be programmed only
once, and cannot be erased. The chip has one 8-bit error register which provides 8 times continuous PSC
authentication, after 8 times the chip cannot be erased and written.
1. Reset and reset acknowledge
The chip enters the power on reset state when it is power on, and this state will end by the reset signal. The
reset signal begins when RST changed from “0”to “1”, and end when CLK changed from “0”to“1”. The reset
signal can stop any active instruction. Read operation must be carried out first after power on reset, then the
other operations.
The reset acknowledge complies to ISO7816-3 synchronous propagation. The address counter is set to “0”
automatically and will send the first data to the I/O port. As the clock signal, the address data can be read serially.
The details refer to the figure 1.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0 2006.07.21
Page 3 of 10


3Pages


SC23M28B 電子部品, 半導体
Figure5 Time sequence of erase or write error
SC23M28
3.2 Read operation
1) Read with protect bit
This command will read the content of the destination address unit and the corresponding protect bit
together, 9 bits in total (Figure6). After 9 clock cycles, the address increases by 1 automatically.
2) Read without protect bit
This command will only read the content of the destination address unit Figure6 . After 8 clock
cycles, the address increases by 1 automatically.
When RST changes from “0”to“1”, read operation stops.
Figure6 Read operation time sequence
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3.3 Password authentication
The SC23M28 is only readable without PSC authentication. The content of PSC cannot be read, if you try to
read PSC, you will get “00”.
The authentication steps are as follows:
--Write one to not written error counter (EC) bit and the EC address is“1021”;
--Input the first byte data of PSC code, and the address is“1022”;
--Input the second byte data of PSC code, and the address is “1023”;
--If pass the authentication, EC can be erased.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0 2006.07.21
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6 Page



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共有リンク

Link :


部品番号部品説明メーカ
SC23M28

8KBIT MEMORY CARD IC

Silan Microelectronics
Silan Microelectronics
SC23M28A

8KBIT MEMORY CARD IC

Silan Microelectronics
Silan Microelectronics
SC23M28B

8KBIT MEMORY CARD IC

Silan Microelectronics
Silan Microelectronics
SC23M28C

8KBIT MEMORY CARD IC

Silan Microelectronics
Silan Microelectronics


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