SC23M28 Silan Microelectronics, SC23M28 Datasheet - Page 3

• Manufacturer Part Number: SC23M28
• Description: 8KBIT MEMORY CARD IC
• Manufacturer: Silan Microelectronics

www.DataSheet4U.com
PIN CONFIGURATION
PIN DESCRIPTIONS
FUNCTION DESCRIPTIONS
(Programmable 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
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.
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
Pin No.
SC23M28 provides 1024×8 bits EEPROM memory units with write-protect for each bit. Except PSC
The chip enters the power on reset state when it is power on, and this state will end by the reset signal. The
The reset acknowledge complies to ISO7816-3 synchronous propagation. The address counter is set to “ 0”
1
2
3
4
5
6
7
8
Symbol
GND
RST
CLK
V
NC
NC
I/O
NC
CC
I/O
I/O
--
--
--
--
--
I
I
Power supply voltage is 5V
Reset signal
Clock signal
No connect
Ground
No connect
Data bus(open-drain output)
No connect
RST
CLK
(Contact of the card)
V
NC
CC
1
2
3
4
8
7
6
5
GND
NC
I/O
NC
Description
REV:1.0
SC23M28
Page 3 of 10
2006.07.21