W39V040FB_07 Datasheet, PDF (9/34 Pages) Winbond – 512K × 8 CMOS FLASH MEMORY WITH FWH INTERFACE

W39V040FB
Block Locking Registers type and access memory map Table
REGISTERS
BLR7
BLR6
BLR5
BLR4
BLR3
BLR2
BLR1
BLR0
REGISTERS
TYPE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
CONTROL
BLOCK
7
6
5
4
3
2
1
0
DEVICE PHYSICAL
ADDRESS
7FFFFh – 70000h
6FFFFh – 60000h
5FFFFh – 50000h
4FFFFh – 40000h
3FFFFh – 30000h
2FFFFh – 20000h
1FFFFh – 10000h
0FFFFh – 00000h
4GBYTES SYSTEM
MEMORY ADDRESS
FFBF0002h
FFBE0002h
FFBD0002h
FFBC0002h
FFBB0002h
FFBA0002h
FFB90002h
FFB80002h
Block Locking Register Bits Function Table
BIT
7–3
2
1
0
FUNCTION
Reserved
Read Lock
1: Prohibit to read in the block where set
0: Normal read operation in the block where clear. This is default state.
Lock Down
1: Prohibit further to set or clear the Read Lock or Write Lock bits. This Lock Down
Bit can only be set not clear. Only the device is reset or re-powered, the Lock
Down Bit is cleared.
0: Normal operation for Read Lock or Write Lock. This is the default state.
Write Lock
1: Prohibited to write in the block where set. This is default state.
0: Normal programming/erase operation in the block where clear.
7.4 Register Based Block Locking Value Definitions Table
BIT [7:3]
00000
00000
00000
00000
00000
00000
00000
00000
BIT 2
0
0
0
0
1
1
1
1
BIT 1
0
0
1
1
0
0
1
1
BIT 0
0
1
0
1
0
1
0
1
RESULT
Full Access.
Write Lock. Default State.
Locked Open (Full Access, Lock Down).
Write Locked, Locked Down.
Read Locked.
Read & Write Locked.
Read Locked, Locked Down.
Read & Write Locked, Locked Down.
Publication Release Date: December 12, 2005
-9-
Revision A4