9 read security register (opcode 77h), 10 status register read (opcode d7h), 11 manufacturer and device read (opcode 9fh) – Rainbow Electronics AT45DB321D User Manual
Page 44: Sck cs si so
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44
3597J–DFLASH–4/08
AT45DB321D
24.9
Read Security Register (Opcode 77H)
24.10 Status Register Read (Opcode D7H)
24.11 Manufacturer and Device Read (Opcode 9FH)
SCK
CS
SI
SO
MSB
MSB
2
3
1
0
0
1
1
1
0
1
1
1
6
7
5
4
10 11
9
8
12
37 38
33
36
35
34
31 32
29 30
39 40
OPCODE
X
X
X
X
X
X
X
X
X
MSB
MSB
D
D
D
D
D
D
D
D
D
DON'T CARE
DATA BYTE 1
HIGH-IMPEDANCE
SCK
CS
SI
SO
MSB
2
3
1
0
1
1
0
1
0
1
1
1
6
7
5
4
10 11
9
8
12
21 22
17
20
19
18
15 16
13 14
23 24
OPCODE
MSB
MSB
D
D
D
D
D
D
D
D
D
D
MSB
D
D
D
D
D
D
D
D
STATUS REGISTER DATA
STATUS REGISTER DATA
HIGH-IMPEDANCE
SCK
CS
SI
SO
6
0
9FH
8
7
38
OPCODE
1FH
DEVICE ID BYTE 1
DEVICE ID BYTE 2
00H
HIGH-IMPEDANCE
14
16
15
22
24
23
30
32
31
Note: Each transition
shown for SI and SO represents one byte (8 bits)
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