Rainbow Electronics AT45DB021D - Manual (Page 36)

36
3638K–DFLASH–11/2012
AT45DB021D
Figure 17-11. Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
18. Read Operations
The following block diagram and waveforms illustrate the various read sequences available.
Figure 18-1. Main Memory Page Read
SI (INPUT) CMD PA9-7 PA6-0, X
CS
Starts self-timed erase/program operation
XXXX XX
Each transition
represents 8 bits
n = 1st byte read
n+1 = 2nd byte read
BINARY PAGE SIZE
A17-A8 + 8 DON'T CARE BITS
FLASH MEMORY ARRAY
PAGE (256/264 BYTES)
BUFFER (256/264 BYTES)
I/O INTERFACE
MAIN MEMORY
PAGE TO
BUFFER
MAIN MEMORY
PAGE READ BUFFER
READ
SO
SI (INPUT) CMD PA9-7 PA6-0, BA8 X
CS
n n+1 SO (OUTPUT)
BA7-0
4 Dummy Bytes
X
ADDRESS FOR BINARY PAGE SIZE
A17-A16 A15-A8 A7-A0