參數(shù)資料
型號(hào): W25B20-VSNIG
廠商: WINBOND ELECTRONICS CORP
元件分類(lèi): PROM
英文描述: 2M X 1 FLASH 2.7V PROM, PDSO8
封裝: 0.150 INCH, GREEN, PLASTIC, SOIC-8
文件頁(yè)數(shù): 5/36頁(yè)
文件大?。?/td> 1424K
代理商: W25B20-VSNIG
W25B40/W25B40A
Publication Release Date: January 6, 2006
- 13 -
Revision M
8.2.1
Manufacturer and Device Identification
MANUFACTURER ID
(M7-M0)
Winbond Serial Flash
EFH
Device ID
(ID7-ID0)
W25B40 / W25B40A (Bottom Boot)
32h
W25B40 / W25B40A (Top Boot)
42h
8.2.2
Instruction Set (1)
INSTRUCTION
NAME
BYTE 1
CODE
BYTE 2
BYTE 3
BYTE 4
BYTE 5
BYTE 6
N-BYTES
Write Enable
06h
Write Disable
04h
Read Status
Register
05h
(S7–S0)
(1)
(2)
Write Status
Register
01h
S7–S0
Read Data
03h
A23–A16
A15–A8
A7–A0
(D7–D0)
(Next byte) continuous
Fast Read
0Bh
A23–A16
A15–A8
A7–A0
dummy
(D7–D0)
(Next Byte)
continuous
Page Program
02h
A23–A16
A15–A8
A7–A0
(D7–D0)
(Next byte)
up to 256
bytes
Sector Erase
D8h
A23–A16
A15–A8
A7–A0
(5)
Chip Erase
C7h
Power-down
B9h
Release Power-
down / Device ID
ABh
dummy
(ID7-ID0)
(3)
Manufacturer/
Device ID
90h
dummy
00h
(M7-M0)
(ID7-ID0)
(4)
Notes:
1. Data bytes are shifted with Most Significant Bit first. Byte fields with data in parenthesis “( )” indicate data being read from the
device on the DO pin.
2. The Status Register contents will repeat continuously until /CS terminates the instruction.
3. The Device ID will repeat continuously until /CS terminates the instruction.
4. The Manufacturer ID and Device ID bytes will repeat continuously until /CS terminates the instruction.
5. The W25B40 Bottom Boot version must use the last page address for sectors 2, 3, and 4 ( 003Fxx, 007Fxx and 00FFxx hex
respectively). The W25B40 Top Boot version must use the first page address for sectors 7, 8 and 9 ( 0700xx, 0780xx and
07C0xx hex respectively). All other sectors may use any page address within the sector. The W25B40A may use any page
address within the sector for sector erase.
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