Owner's manual

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
XXX
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 c
y
cles
n = 1st byte read
n+1 = 2nd byte read