AT45DB642D-CNU-SL954 ATMEL [ATMEL Corporation], AT45DB642D-CNU-SL954 Datasheet - Page 41

• Manufacturer Part Number: AT45DB642D-CNU-SL954
• Description: 64-megabit 2.7-volt Dual-interface DataFlash
• Manufacturer: ATMEL [ATMEL Corporation]

22.1
22.2
23. Read Operations
The following block diagram and waveforms illustrate the various read sequences available.
3542H–DFLASH–4/08
SI or I/O7 - I/O0
Buffer Write
Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
(INPUT)
SI or I/O7 - I/O0
CS
(INPUT)
CS
BUFFER 1 (1024/1056 BYTES)
represents 8 bits
MAIN MEMORY
PAGE (1024/1056 BYTES)
Each transition
BUFFER 1
BUFFER 1
PAGE TO
READ
CMD
SO
CMD
X
14 DON'T CARE + BFA9-BFA0
BINARY PAGE SIZE
FLASH MEMORY ARRAY
X···X, BFA10-8
I/O INTERFACE
PA12-5
Starts self-timed erase/program operation
MAIN MEMORY
PAGE READ
A22-A10 + 10 DON'T CARE BITS
BFA7-0
BINARY PAGE SIZE
BUFFER 2 (1024/1056 BYTES)
I/O7 - I/O0
PA4-0, XXX
n
Completes writing into selected buffer
MAIN MEMORY
PAGE TO
BUFFER 2
BUFFER 2
READ
n+1
XXXX XX
n = 1st byte read
n+1 = 2nd byte read
AT45DB642D
Last Byte
41