
Detailed Parallel Timing – SPI Mode 0 (Continued)
Main Memory Page Read (Opcode: D2H)
CS
CLK
1
2
3
4
5
60
61
62
63
64
65
66
67
tSU
I/O7-I/O0
(INPUT)
COMMAND OPCODE
CMD ADDR ADDR ADDR
X
X
X
X
X
X
I/O7-I/O0
(OUTPUT)
HIGH IMPEDANCE
tV
DATA OUT
DATA DATA DATA DATA
Buffer Read (Opcode: D4H or D6H)
CS
CLK
1
2
3
4
5
6
7
tSU
I/O7-I/O0
(INPUT)
COMMAND OPCODE
CMD ADDR ADDR ADDR
X
I/O7-I/O0
(OUTPUT)
HIGH IMPEDANCE
tV
DATA OUT
DATA DATA DATA
MSB
Status Register Read (Opcode: D7H)
CS
CLK
1
2
3
4
tSU
I/O7-I/O0
CMD
(INPUT)
tV
30
I/O7-I/O0
(OUTPUT)
AT45DB642
HIGH IMPEDANCE
DATA DATA DATA
STATUS
REGISTER OUTPUT
1638F – DFLSH – 09/02