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SC23M28D Schematic ( PDF Datasheet ) - Silan Microelectronics

Teilenummer SC23M28D
Beschreibung 8KBIT MEMORY CARD IC
Hersteller Silan Microelectronics
Logo Silan Microelectronics Logo 




Gesamt 10 Seiten
SC23M28D Datasheet, Funktion
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






SC23M28D Datasheet, Funktion
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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