sc23m42 Silan, sc23m42 Datasheet - Page 5

• Manufacturer Part Number: sc23m42
• Description: 256-byte Memory Card Ic
• Manufacturer: Silan

1) Read main memory
2. Instruction format
Instruction table
3. Instruction description
m=(256-N) ×8+1
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
B7B6B5B4
0 0 1 1
0 0 1 1
0 0 1 1
0 0 1 1
0 0 1 1
0 0 1 1
0 0 1 1
Binary
Hex
This command will read the data from current byte address N to the last address and the needed pulse number
CLK
I/O
Byte1control
from IFD
Command
Start
0
B3B2B1B0
0 0 0 0
1 0 0 0
0 1 0 0
1 1 0 0
0 0 0 1
1 0 0 1
0 0 1 1
B0
1
B7
0
B1
2
B6
0
Byte2 Address
Address bit
Address bit
invalid
Address bit
invalid
Address bit
Address bit
B5
1
B6
A7-A0
7
Figure 2 Command input time sequence
B4
Control
1
B7
30H
8
B3
0
A0
9
invalid
Input data
invalid
Input data
invalid
Input data
Input data
Byte3 Data
B2
D7-D0
A1
0
10
B1
0
A6
15
Read the main memory
Write the main memory
Read protect memory
Write protect memory
Read password memory
Amend password memory
Compare
data
B0
0
A7
16
Address
00H… FFH
Operation
Address
A7… A0
D0
17
authentication
D1
18
REV:1.0
No effect
No effect
D6
23
IFD Sets I/O to level L
Output data
Process
Output data
Process
Output data
Process
Process
D7… D0
SC23M42
Data
Page 5 of 11
D7
Method
24
2006.07.21
from IFD
Stop