AT45DB011B
Read
Operations
The following block diagram and waveforms illustrate the various read sequences available.
FLASH MEMORY ARRAY
PAGE (264 BYTES)
MAIN MEMORY
PAGE TO
BUFFER
MAIN MEMORY
PAGE READ
BUFFER (264 BYTES)
BUFFER
READ
I/O INTERFACE
SO
Main Memory Page Read
CS
SI
CMD
r ···r , PA8-7
PA6-0, BA8
BA7-0
X
X
X
X
n
n+1
SO
Main Memory Page to Buffer Transfer (Data from Flash Page Read into Buffer)
Starts reading page data into buffer
CS
SI
CMD
r ···r , PA8-7
PA6-0, X
X
SO
Buffer Read
CS
SI
CMD
X
X···X, BFA8
BFA7-0
X
SO
n
n+1
n = 1st byte read
Each transition represents
8 bits and 8 clock cycles
n+1 = 2nd byte read
17
1984H–DFLSH–10/04
ATMEL [ ATMEL ]
