Rainbow Electronics AT45DB021E - Manual (Page 52)

52 AT45DB021E [PRELIMINARY DATASHEET]
8789B–DFLASH–11/2012
23. Write Operations
The following block diagram and waveforms illustrate the various write sequences available.
Figure 23-1. Block Diagram
Figure 23-2. Buffer Write
Figure 23-3. Buffer to Main Memory Page Program
Flash Memory Array
I/O Interface
SI
Buffer To
Main Memory
Page Program
Buffer
Write
Page (256/264 bytes)
Buffer (256/264 bytes)
CS
SI (Input) CMD X X···X, BFA8 BFA7-0 n n + 1 Last Byte
Completes Writing into Selected Buffer
Binary Page Size
16 Dummy Bits + BFA7-BFA0
CS
SI (Input) CMD PA9-7 PA6-0, X XXXX XXX
Starts Self-timed Erase/Program Operation
Binary Page Size
A17-A8 + 8 Dummy Bits
n = 1st byte read
n+1 = 2nd byte read
Each transition represents eight bits