AT45DB321C
15. Read Operations
The following block diagram and waveforms illustrate the various read sequences available.
FLASH MEMORY ARRAY
PAGE (52 8 BYTES)
MAI N MEMORY
PAGE TO
BUFFER 1
BUFFER 1 (52 8 BYTES)
MAI N MEMORY
PAGE TO
BUFFER 2
BUFFER 2 (52 8 BYTES)
15.1
CS
BUFFER 1
READ
Main Memory Page Read
MAI N MEMORY
PAGE READ
I/O I N TERFACE
SO
BUFFER 2
READ
SI
CMD
r , PA12-6
PA5-0, BA9- 8
BA7-0
X
X
X
X
SO
15.2
n
Main Memory Page to Buffer Transfer (Data from Flash Page Read into Buffer)
Starts reading page data into buffer
CS
n+1
SI
CMD
r , PA12-6
PA5-0, XX
X
SO
15.3
Buffer Read
CS
SI
CMD
X
X···X, BFA9- 8
BFA7-0
X
SO
Each transition represents
8 bits and 8 clock cycles
n
n+1
n = 1st byte read
n+1 = 2nd byte read
27
3387M–DFLASH–2/08
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相关代理商/技术参数
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