24.7Read Sector Protection Register (Opcode 32H)
CS 
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SCK |
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OPCODE |
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DON'T CARE |
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SI
SO
0 0 1 1 0 0 1 0 X X X X X X |
X X X |
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MSB |
MSB |
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DATA BYTE 1 |
HIGH-IMPEDANCE |
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D D |
D D D D D D D |
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MSB |
MSB |
24.8Read Sector Lockdown Register (Opcode 35H)
CS 
0 |
1 |
2 |
3 |
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SCK |
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OPCODE |
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SI
SO
0 0 1 1 0 1 0 1 X X X X X X |
X X X |
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MSB |
MSB |
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DATA BYTE 1 |
HIGH-IMPEDANCE |
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D D |
D D D D D D D |
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MSB |
MSB |
24.9Read Security Register (Opcode 77H)
CS 
0 |
1 |
2 |
3 |
4 |
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5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
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SCK |
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OPCODE |
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SI
SO
0 1 1 1 0 1 1 1 X X X X X X |
X X X |
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MSB |
MSB |
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DATA BYTE 1 |
HIGH-IMPEDANCE |
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D D |
D D D D D D D |
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MSB |
MSB |
46 AT45DB642D
3542M–DFLASH–11/2012
AT45DB642D
24.10 Status Register Read (Opcode D7H)
CS
SCK
SI
SO
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
OPCODE
1 |
1 |
0 |
1 |
0 |
1 |
1 |
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MSB |
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STATUS REGISTER DATA |
STATUS REGISTER DATA |
HIGH-IMPEDANCE
D D D D D D D D D D D D D D D D D D
MSB MSB MSB
24.11 Manufacturer and Device Read (Opcode 9FH)
CS
0 |
6 |
7 |
8 |
14 |
15 |
16 |
22 |
23 |
24 |
30 |
31 |
32 |
38 |
SCK 
SI
OPCODE
9FH
SO
HIGH-IMPEDANCE
1FH |
DEVICE ID BYTE 1 DEVICE ID BYTE 2 |
00H |
Note: Each transition |
shown for SI and SO represents one byte (8 bits) |
47
3542M–DFLASH–11/2012