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AT45DB021B Fiches technique(PDF) 18 Page - ATMEL Corporation

No de pièce AT45DB021B
Description  2-megabit 2.7-volt Only DataFlash
PDF  32 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  ATMEL [ATMEL Corporation]
Site Internet  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT45DB021B Fiches technique(HTML) 18 Page - ATMEL Corporation

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1937J–DFLSH–9/05
AT45DB021B
11. Read Operations
The following block diagram and waveforms illustrate the various read sequences available.
11.1
Main Memory Page Read
11.2
Main Memory Page to Buffer Transfer (Data from Flash Page Read into Buffer)
11.3
Buffer Read
FLASH MEMORY ARRAY
PAGE (264 BYTES)
BUFFER 2 (264 BYTES)
BUFFER 1 (264 BYTES)
I/O INTERFACE
MAIN MEMORY
PAGE TO
BUFFER 1
MAIN MEMORY
PAGE TO
BUFFER 2
MAIN MEMORY
PAGE READ
BUFFER 1
READ
BUFFER 2
READ
SO
SI
CMD
rrrr r, PA9-7
PA6-0, BA8
BA7-0
X
XXX
CS
n
n+1
SO
SI
CMD
rrrr r, PA9-7
PA6-0, X
X
Starts reading page data into buffer
CS
SO
SI
CMD
X
X···X, BFA8
BFA7-0
CS
n
n+1
SO
X
Each transition represents
8 bits and 8 clock cycles
n = 1st byte read
n+1 = 2nd byte read



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