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PDF SC23M42 Data sheet ( Hoja de datos )
| Número de pieza | SC23M42 | |
| Descripción | 256BYTE MEMORY CARD IC | |
| Fabricantes | Silan Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SC23M42 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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SC23M42
256-BYTE MEMORY CARD IC
DESCRIPTION
SC23M42 is a smart card module utilizing CMOS EEPROM
technology. 256 bytes main memory, 32-bit protection memory, 3
bytes user password, and 3-bit password wrong counter (Value:
00000D2D1D0). And the periphery interface is compatible with
ISO7816 agreement (synchronous propagation).
FEATURES
* 256 X 8 bit EEPROM
* Byte addressing
* Write-protect area (former 32 bytes) can execute the write-protect
separately, and after the write-protect, the content cannot be
changed.
* 32 X 1bit protect memory
ORDERING INFORMATION
* Serial two buses interface
Device
Package
* More than 100,000 times write endurance cycles
* Data retention of more than 10 years
* Contact definition and serial interface comply to ISO7816
SC23M42A
SC23M42B
P6-05
MCTS012402
specification (synchronous propagation)
APPLICATIONS
* 3 Bytes user password, 3 bits(bit0-bit2) error counter
* Before the password is checked, all the data can be read; if the
* used for various IC memory cards.
password is correct, you can write or amend the data and the
password.
* Password error counter, and the initial value is 3. Checking the
www.DataSheet4pUa.csosmword once, subtracts 1, if the value of the counter is 0, the
memory card will be locked automatically, and the data can only
be read, the password cannot be checked again; When the value
of the counter is not 0, if the password checking is correct for one
time, the value comes back to initial value.
* Comply to SLE4442
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0 2006.07.21
Page 1 of 11
1 page  
SC23M42
2. Instruction format
Instruction table
Byte1control
B7B6B5B4 B3B2B1B0
Byte2 Address
A7-A0
0011
0000
Address bit
0011
1000
Address bit
0011
0100
invalid
0011
1100
Address bit
0011
0001
invalid
0011
1001
Address bit
0011
0011
Address bit
Byte3 Data
D7-D0
invalid
Input data
invalid
Input data
invalid
Input data
Input data
Operation
Method
Read the main memory
Write the main memory
Read protect memory
Write protect memory
Read password memory
Amend password memory
Compare authentication
data
Output data
Process
Output data
Process
Output data
Process
Process
Command
CLK 0 1 2
I/O B0 B1
Figure 2 Command input time sequence
7 8 9 10
B6 B7 A0 A1
15 16 17 18
A6 A7 D0 D1
IFD Sets I/O to level L
23 24
D6 D7
Start
from IFD
Stop
from IFD
3. Instruction description
1) Read main memory
www.DataSheet4U.com
Control
B7 B6 B5 B4 B3 B2 B1 B0
Address
A7… A0
Binary
0 0 1 1 0 0 0 0 Address
Hex 30H 00H… FFH
Data
D7… D0
No effect
No effect
This command will read the data from current byte address N to the last address and the needed pulse number
m=(256-N) ×8+1
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0 2006.07.21
Page 5 of 11
5 Page 
SC23M42
HANDLING MOS DEVICES:
Electrostatic charges can exist in many things. All of our MOS devices are internally protected against
electrostatic discharge but they can be damaged if the following precautions are not taken:
• Persons at a work bench should be earthed via a wrist strap.
• Equipment cases should be earthed.
• All tools used during assembly, including soldering tools and solder baths, must be earthed.
• MOS devices should be packed for dispatch in antistatic/conductive containers.
www.DataSheet4U.com
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0 2006.07.21
Page 11 of 11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet SC23M42.PDF ] | |
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