Rainbow Electronics AT25DQ321 - Manual (Page 5)

5 AT25DQ321 [DATASHEET]
8718D–DFLASH–12/2012
3. Block Diagram
Figure 3-1. Block Diagram
Flash
Memory
Array
Y-Gating
CS
SCK
Note: I/O3-0 pin naming convention is used for Dual-I/O and Quad-I/O commands.
SO (I/O1)
SI (I/O0)
Y-Decoder
Address Latch
X-Decoder
I/O Buffers
and Latches
Control and
Protection Logic
SRAM
Data Buffer
WP (I/O2)
Interface
Control
And
Logic
HOLD (I/O3)