AT45D021A_14 Datasheet, PDF (17/28 Pages) ATMEL Corporation – Optional Page and Block Erase Operations

AT45D021A
Detailed Bit-level Read Timing – Inactive Clock Polarity Low (Continued)
Main Memory Page Read (Opcode: 52H)
CS
SCK
tSU
SI
SO
1
2
3
4
5
60 61 62 63 64 65 66 67
COMMAND OPCODE
0
1
0
1
0
X
X
X
X
X
tV
HIGH-IMPEDANCE
DATA OUT
D7 D6 D5
MSB
Buffer Read (Opcode: 54H or 56H)
CS
SCK
tSU
SI
SO
1
2
3
4
5
36 37 38 39 40 41 42 43
COMMAND OPCODE
0
1
0
1
0
X
X
X
X
X
tV
HIGH-IMPEDANCE
DATA OUT
D7 D6 D5
MSB
Status Register Read (Opcode: 57H)
CS
SCK
tSU
SI
SO
1
2
3
4
5
6
7
8
9
10 11 12
16 17
COMMAND OPCODE
0
1
0
1
0
1
1
1
tV
HIGH-IMPEDANCE
STATUS REGISTER OUTPUT
D7 D6 D5
MSB
D1 D0 D7
LSB MSB
17