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PDF SC23M28 Data sheet ( Hoja de datos )

Número de pieza SC23M28
Descripción 8KBIT MEMORY CARD IC
Fabricantes Silan Microelectronics 
Logotipo Silan Microelectronics Logotipo



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No Preview Available ! SC23M28 Hoja de datos, Descripción, Manual

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
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SC23M28 pdf
SC23M28
3. Instruction description
3.1 Erase/write operation
1) Erase or write with protect bit
The write protect bit is active as long as you write the data, and this unit is only readable.
2) Erase or write without protect bit.
Write the data but not set the protect bit, so this unit can still be erased and written.
3) Write protect bit with data comparison
When the command is executed, it will compare the data and the content of the destination address
unit, if the contents are the same, then write “0”to the corresponding address unit; if the contents are
different, do nothing.
The chip can execute 3 erase and write operation:
Erase and write (Last 203 clock cycles) (Figure3);
Only Write: used for some bits of 1 byte data change from “1”to “0”(Last 103 clock cycles)(Figure4);
Only Erase: data is FF (Last 103 clock cycles) (Figure4).
If error occurs when erase or write data, I/O port will change from high level to low level at the
raising edge of the third clock cycle. (Figure5).
Figure3 Erase and write time sequence
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Figure4 Only Erase or only Write time sequence
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0 2006.07.21
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