Sck cs si so – Rainbow Electronics AT45DB021D User Manual
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39
3638K–DFLASH–11/2012
AT45DB021D
Figure 19-5. Buffer Read (Opcode D4H)
Figure 19-6. Buffer Read (Low Frequency: Opcode D1H)
Figure 19-7. Read Sector Protection Register (Opcode 32H)
SCK
CS
SI
SO
MSB MSB
2 3
1
0
1 1 0 1 0 1 0 0
6 7
5
4 10
11
9
8 12
39
42
43
41
40
37 38
33 36
35
34
31 32
29 30
44
47 48
46
45
OPCODE
X X X X
A A A
X X
MSB
X X X X X X X X
MSB MSB
D D D D D D D D
D
D
ADDRESS BITS
BINARY PAGE SIZE = 16 DON'T CARE + BFA7-BFA0
STANDARD DATAFLASH PAGE SIZE =
15 DON'T CARE + BFA8-BFA0
DON'T CARE
DATA BYTE 1
HIGH-IMPEDANCE
SCK
CS
SI
SO
MSB MSB
2 3
1
0
1 1 0 1 0 0 0 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
A A A
X X
MSB MSB
D D D D D D D D
D
D
DATA BYTE 1
HIGH-IMPEDANCE
ADDRESS BITS
BINARY PAGE SIZE = 16 DON'T CARE + BFA7-BFA0
STANDARD DATAFLASH PAGE SIZE =
15 DON'T CARE + BFA8-BFA0
SCK
CS
SI
SO
MSB
MSB
2
3
1
0
0
0
1
1
0
0
1
0
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