at45db021b ATMEL Corporation, at45db021b Datasheet - Page 20

• Manufacturer Part Number: at45db021b
• Description: At45db021b 2-megabit 2.7-volt Only Dataflash
• Manufacturer: ATMEL Corporation

12.3
12.4
20
SCK
SO
CS
SCK
SI
SO
CS
Buffer Read (Opcode: 54H or 56H)
Status Register Read (Opcode: 57H)
SI
AT45DB021B
t
SU
t
SU
1
0
1
0
COMMAND OPCODE
2
1
HIGH-IMPEDANCE
2
1
COMMAND OPCODE
3
0
3
0
HIGH-IMPEDANCE
4
1
4
1
5
0
5
0
6
1
1
7
36
X
8
1
37
X
t
V
9
38
X
MSB
D 7
10
39
X
STATUS REGISTER OUTPUT
D 6
11
40
X
t
D 5
V
12
41
MSB
D 7
42
DATA OUT
D 1
16
D 6
43
LSB
D 0
17
D 5
1937J–DFLSH–9/05
MSB
D 7