SLE 4432
SLE 4442
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鈥?55) 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 鈥?N)
脳
8 + 1. The read access to the main
memory is always possible.
Address Main Memory
(decimal)
255
:
32
31
:
3
2
1
0
:
Data Byte 32 (D7 鈥?D0)
Data Byte 31 (D7 鈥?D0)
:
Data Byte 3 (D7 鈥?D0)
Data Byte 2 (D7 鈥?D0)
Data Byte 1 (D7 鈥?D0)
Data Byte 0 (D7 鈥?D0)
Protection Memory
Security Memory
(only SLE 4442)
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Reference Data Byte 3 (D7 鈥?D0)
Reference Data Byte 2 (D7 鈥?D0)
Reference Data Byte 1 (D7 鈥?D0)
Error Counter
Data Byte 255 (D7 鈥?D0) 鈥?/div>
鈥?/div>
鈥?/div>
:
Protection Bit 3 (D3)
Protection Bit 2 (D2)
Protection Bit 1 (D1)
Protection Bit 0 (D0)
Protection Bit 31 (D31) 鈥?/div>
Command:
READ MAIN MEMORY
Control
B7
Binary
Hexadecimal
0
B6
0
B5
1
B4
1
30
H
B3
0
B2
0
B1
0
B0
0
Address
A7鈥0
Address
00
H
鈥F
H
Data
D7鈥0
No effect
No effect
Figure 5
Read Main Memory
Semiconductor Group
14
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