AT45DB161B-CNU ATMEL Corporation, AT45DB161B-CNU Datasheet - Page 17

• Manufacturer Part Number: AT45DB161B-CNU
• Description: 16 MEGABIT 2.5-VOLT ONLY OR 2.7-VOLT ONLY DATAFLASH
• Manufacturer: ATMEL Corporation

Read Operations
Main Memory Page Read
Main Memory Page to Buffer Transfer (Data from Flash Page Read into Buffer)
Buffer Read
2224I–DFLSH–10/04
Each transition represents
SO
CS
SI
8 bits and 8 clock cycles
CMD
SO
CS
SI
MAIN MEMORY
PAGE (528 BYTES)
BUFFER 1 (528 BYTES)
r r , PA11-6
BUFFER 1
BUFFER 1
PAGE TO
CS
SO
SI
READ
The following block diagram and waveforms illustrate the various read sequences
available.
CMD
PA5-0, BA9-8
CMD
X
FLASH MEMORY ARRAY
BA7-0
X···X, BFA9-8
r r , PA11-6
I/O INTERFACE
SO
X
MAIN MEMORY
PAGE READ
Starts reading page data into buffer
BFA7-0
PA5-0, XX
X
BUFFER 2 (528 BYTES)
X
X
X
n
MAIN MEMORY
PAGE TO
BUFFER 2
BUFFER 2
READ
n+1
X
AT45DB161B
n = 1st byte read
n+1 = 2nd byte read
n
n+1
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