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參數(shù)資料
| 型號： | W49V002FAQ |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | PROM |
| 英文描述： | 256K X 8 CMOS FLASH MEMORY WITH FWH INTERFACE |
| 中文描述： | 256K X 8 FLASH 3.3V PROM, 11 ns, PDSO32 |
| 封裝： | 8 X 14 MM, STSOP-32 |
| 文件頁數(shù)： | 5/32頁 |
| 文件大小： | 300K |
| 代理商： | W49V002FAQ |
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W49V002FA
Publication Release Date: February 19, 2002
- 5 -
Revision A2
Toggle Bit (DQ
6
)- Write Status Detection
In addition to data polling, the W49V002FA provides another method for determining the end of a
program cycle. During the internal program or erase cycle, any consecutive attempts to read DQ
6
will
produce alternating 0's and 1's. When the program or erase cycle is completed, this toggling between
0's and 1's will stop. The device is then ready for the next operation.
General Purpose Inputs Register
This register reads the FGPI[4:0] pins on the W49V002FA.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.
BIT
7
5
4
3
2
1
0
FUNCTION
Reserved
Read FGPI4 pin status
Read FGPI3 pin status
Read FGPI2 pin status
Read FGPI1 pin status
Read FGPI0 pin status
Product Identification
The product ID operation outputs the manufacturer code and device code. Programming equipment
automatically matches the device with its proper erase and programming algorithms.
The manufacturer and device codes can be accessed by software operation. In the software access
mode, a six-byte (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, 32(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).
As for 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 32(hex).
TABLE OF OPERATING MODES
Operating Mode Selection - Programmer Mode
(V
HH
= 12V
±
5
%
)
MODE
#OE
Read
V
IL
Write
V
IH
Standby
Write Inhibit
V
IL
Output Disable
V
IH
PINS
#WE
V
IH
V
IL
X
X
V
IH
X
#RESET
V
IH
V
IH
V
IL
V
IH
V
IH
V
IH
ADDRESS
AIN
AIN
X
X
X
X
DQ.
Dout
Din
High Z
High Z/DOUT
High Z/DOUT
High Z
X
X
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