SLE4442 Siemens, SLE4442 Datasheet - Page 16

• Manufacturer Part Number: SLE4442
• Description: (SLE4432 / SLE4442) 256 Byte EEPROM
• Manufacturer: Siemens

2.3.1 Read Main Memory (SLE 4432 and SLE 4442)
The command reads out the contents of the main memory (with LSB first) starting at the given byte
address (N = 0…255) up to the end of the memory. After the command entry the IFD has to supply
sufficient clock pulses. The number of clocks is m = (256 – N)
memory is always possible.
Address
(decimal)
255
32
31
3
2
1
0
Command: READ MAIN MEMORY
Binary
Hexadecimal
Figure 5
Read Main Memory
Semiconductor Group
:
:
Data Byte 255 (D7 … D0) –
Data Byte 32 (D7 … D0)
Data Byte 31 (D7 … D0)
Data Byte 3 (D7 … D0)
Data Byte 2 (D7 … D0)
Data Byte 1 (D7 … D0)
Data Byte 0 (D7 … D0)
Main Memory
B7
0
:
:
B6
0
B5
1
B4
1
Control
Protection Memory
–
:
Protection Bit 3 (D3)
Protection Bit 2 (D2)
Protection Bit 1 (D1)
Protection Bit 0 (D0)
–
Protection Bit 31 (D31) –
30
H
B3
0
14
B2
0
B1
0
8 + 1. The read access to the main
Security Memory
(only SLE 4442)
–
–
–
–
Reference Data Byte 3 (D7 … D0)
Reference Data Byte 2 (D7 … D0)
Reference Data Byte 1 (D7 … D0)
Error Counter
B0
0
Address
A7…A0
Address
00
H
…FF
H
Data
D7…D0
No effect
No effect
SLE 4432
SLE 4442