Rainbow Electronics AT45DB011B - Manual (Page 17)

17
AT45DB011B
1984E–DFLSH–10/02
Read
Operations
The following block diagram and waveforms illustrate the various read sequences available.
Main Memory Page Read
Main Memory Page to Buffer Transfer (Data from Flash Page Read into Buffer)
Buffer Read
FLASH MEMORY ARRAY
PAGE (264 BYTES)
BUFFER (264 BYTES)
I/O INTERFACE
MAIN MEMORY
PAGE TO
BUFFER
MAIN MEMORY
PAGE READ
BUFFER
READ
SO
SI CMD PA6-0, BA8 BA7-0 X X X X
CS
n n+1 SO
r ···r , PA8-7
SI CMD PA6-0, X X
Starts reading page data into buffer
CS
SO
r ···r , PA8-7
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