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W39V040FC View Datasheet(PDF) - Winbond

Part NameDescriptionManufacturer
W39V040FC 512K X 8 CMOS FLASH MEMORY WITH FWH INTERFACE Winbond
Winbond Winbond
W39V040FC Datasheet PDF : 36 Pages
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W39V040FC
7. REGISTER FOR FWH MODE
There are three kinds of registers on this device, the General Purpose Input Registers, the Block Lock
Control Registers and Product Identification Registers. Users can access these registers through
respective address in the 4Gbytes memory map. There are detail descriptions in the sections below.
7.1 General Purpose Inputs Register for FWH Mode
This register reads the FGPI[4:0] pins on the W39V040FC.This is a pass-through register which can
read via memory address FFBC0100(hex). Since it is pass-through register, there is no default value.
GPI Register Table
BIT
75
4
3
2
1
0
Reserved
Read FGPI4 pin status
Read FGPI3 pin status
Read FGPI2 pin status
Read FGPI1 pin status
Read FGPI0 pin status
FUNCTION
7.2 Product Identification Registers
In the FWH interface mode, a read from FFBC, 0000(hex) can output the manufacturer code, DA(hex).
A read from FFBC, 0001(hex) can output the device code 50 (hex).
There is an alternative software method to read out the Product Identification in both the Programmer
interface mode and the FWH interface mode. Thus, the programming equipment can automatically
matches the device with its proper erase and programming algorithms.
In the software access mode, a or JEDEC 3-byte command sequence can be used to access the
product ID for programmer interface mode. A read from address 0000(hex) outputs the manufacturer
code, DA(hex). A read from address 0001(hex) outputs the device code, 50 (hex). The product ID
operation can be terminated by a three-byte command sequence or an alternate one-byte command
sequence (see Command Definition table for detail).
7.3 Block Locking Registers
This part provides 8 even 64Kbytes blocks, and each block can be locked by register control. These
control registers can be set or clear through memory address. Below is the detail description.
Please note that this feature is only can be applied on FWH mode.
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
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Publication Release Date: Apr. 11, 2006
Revision A1
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