AT45DB021D_13 Datasheet, PDF (35/48 Pages) List of Unclassifed Manufacturers – 2-megabit 2.7V Minimum DataFlash

AT45DB021D
Figure 17-8. Command Sequence for Read/Write Operations for Page Size 264-Bytes (Except Status Register
Read, Manufacturer and Device ID Read)
SI (INPUT)
CMD 8-bits 8-bits 8-bits
MSB
XXXXX XXXX XXXX XX X XXXX XXXX
LSB
5 Don’t Care
Bits
Page Address
(PA9 - PA0)
Byte/Buffer Address
(BA8 - BA0/BFA8 - BFA0)
Figure 17-9. Write Operations
The following block diagram and waveforms illustrate the various write sequences available
FLASH MEMORY ARRAY
PAGE (256-/264 BYTES)
BUFFER TO
MAIN MEMORY
PAGE PROGRAM
BUFFER (256-/264-BYTES)
BUFFER
WRITE
I/O INTERFACE
SI
Figure 17-10. Buffer Write
CS
SI (INPUT)
CMD
BINARY PAGE SIZE
16 DON'T CARE + BFA7-BFA0
X
X···X, BFA8
BFA7-0
Completes writing into the buffer
n
n+1
Last Byte
35
3638M–DFLASH–5/2013