AT45DB041-TI 查看數據表（PDF） - Atmel Corporation

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AT45DB041-TI

4-Megabit 2.7-volt Only Serial DataFlash

Atmel Corporation 

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 r r, PA9-7 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 r r, PA9-7 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

10

AT45DB041

n = 1st byte written

n+1 = 2nd byte written

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