Rainbow Electronics AT45DB021D - Manual (Page 35)

35
3638K–DFLASH–11/2012
AT45DB021D
Figure 17-8. Command Sequence for Read/Write Operations for Page Size 264-Bytes (Except Status Register
Read, Manufacturer and Device ID Read)
Figure 17-9. Write Operations
The following block diagram and waveforms illustrate the various write sequences available
Figure 17-10. Buffer Write
Page Address
(PA9 - PA0)
Byte/Buffer Address
(BA8 - BA0/BFA8 - BFA0)
SI (INPUT) CMD 8-bits 8-bits 8-bits
X X X X X X X X X X X X LSB X X X X X X X X MSB
5 Don’t Care
Bits
X X X X
FLASH MEMORY ARRAY
PAGE (256-/264 BYTES)
BUFFER (256-/264-BYTES)
I/O INTERFACE
SI
BUFFER TO
MAIN MEMORY
PAGE PROGRAM
BUFFER
WRITE
SI (INPUT)
CMD
Completes writing into the buffer
CS
X X···X, BFA8 BFA7-0 n n+1 Last Byte
BINARY PAGE SIZE
16 DON'T CARE + BFA7-BFA0