W25Q20BW
6. BLOCK DIAGRAM
Security Register 3 - 0
003000h
002000h
001000h
000000h
0030FFh
0020FFh
0010FFh
0000FFh
Block Segmentation
xxFF00h
•
xxF000h
xxEF00h
•
xxE000h
xxDF00h
•
xxD000h
Sector 15 (4KB)
xxFFFFh
•
xxF0FFh
xxEFFFh
•
xxE0FFh
xxDFFFh
•
xxD0FFh
03FF00h
•
030000h
Block 3 (64KB)
03FFFFh
•
0300FFh
Sector 14 (4KB)
Sector 13 (4KB)
xx2F00h
•
xx2000h
xx1F00h
•
xx1000h
xx0F00h
•
xx0000h
Sector 2 (4KB)
xx2FFFh
•
xx20FFh
xx1FFFh
•
xx10FFh
xx0FFFh
•
xx00FFh
Write Protect Logic and Row Decode
•
•
•
Sector 1 (4KB)
Sector 0 (4KB)
•
•
•
/WP (IO
2
)
Write Control
Logic
Status
Register
01FF00h
•
010000h
00FF00h
•
000000h
SPI
Command &
Control Logic
Page Address
Latch / Counter
Beginning
Page Address
High Voltage
Generators
/HOLD (IO
3
)
CLK
/CS
Block 1 (64KB)
01FFFFh
•
0100FFh
00FFFFh
•
0000FFh
Ending
Page Address
Block 0 (64KB)
Column Decode
And 256-Byte Page Buffer
Data
DI (IO
0
)
DO (IO
1
)
Byte Address
Latch / Counter
Figure 2. W25Q20BW Serial Flash Memory Block Diagram
-8-
W25Q20BW
WINBOND [ WINBOND ]
