AT45DB321B-CI View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'AT45DB321B-CI' PDF : 32 Pages View PDF
AT45DB321B
Read Operations
The following block diagram and waveforms illustrate the various read sequences
available.
FLASH MEMORY ARRAY
PAGE (528 BYTES)
MAIN MEMORY
PAGE TO
BUFFER 1
BUFFER 1 (528 BYTES)
BUFFER 1
READ
MAIN MEMORY
PAGE TO
BUFFER 2
BUFFER 2 (528 BYTES)
MAIN MEMORY
PAGE READ
BUFFER 2
READ
I/O INTERFACE
SO
Main Memory Page Read
CS
SI
CMD
r , PA12-6 PA5-0, BA9-8
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 , PA12-6
PA5-0, XX
X
SO
Buffer Read
CS
SI
SO
CMD
X
X···X, BFA9-8 BFA7-0
X
n
n+1
Each transition represents
8 bits and 8 clock cycles
n = 1st byte read
n+1 = 2nd byte read
17
2223E–DFLASH–11//03
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