AT45DB081A-TI 查看數據表（PDF） - Atmel Corporation

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AT45DB081A-TI

8-megabit 2.7-volt Only Serial DataFlash®

Atmel Corporation 

AT45DB081A

Read Operations

The following block diagram and waveforms illustrate the various read sequences available.

FLASH MEMORY ARRAY

PAGE (264 BYTES)

MAIN MEMORY

PAGE TO

BUFFER 1

BUFFER 1 (264 BYTES)

BUFFER 1

READ

MAIN MEMORY

PAGE TO

BUFFER 2

BUFFER 2 (264 BYTES)

MAIN MEMORY

PAGE READ

BUFFER 2

READ

I/O INTERFACE

SO

Main Memory Page Read

CS

SI

CMD

r r r , PA11-7 PA6-0, BA8

BA7-0

X

X

X

X

SO

n

n+1

Main Memory Page to Buffer Transfer (Data from Flash Page Read into Buffer)

Starts reading page data into buffer

CS

SI

CMD

r r r , PA11-7 PA6-0, X

X

SO

Buffer Read

CS

SI

SO

CMD

X

X···X, BFA8 BFA7-0

X

n

n+1

Each transition represents

8 bits and 8 clock cycles

n = 1st byte read

n+1 = 2nd byte read

15

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