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參數(shù)資料
| 型號： | W49L401TS70B |
| 元件分類： | EEPROM |
| 英文描述： | EEPROM |
| 中文描述： | EEPROM的 |
| 文件頁數(shù)： | 5/24頁 |
| 文件大?。?/td> | 307K |
| 代理商： | W49L401TS70B |
W49L401(T)
Publication Release Date: August 16, 2002
- 5 -
Revision A4
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.
Ready/#Busy
The W49L401(T) also provides the hardware method to detect the completion of program/erase cycle .
The RY/#BY
output pin will be asserted low (busy) during programming/erasing operations, and will be
released to high state by an external pull-up (ready) when internal program/erase cycle is completed.
This is an open-drain output pin for easy external connection.
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 or hardware operation. In the
software access mode, a six-word (or JEDEC 3-word) command sequence can be used to access the
product ID. A read from address 0000H outputs the manufacturer code, 00DA(hex). A read from
address 0001(hex) outputs the device code, 003D(hex) for bottom boot (and TBD for top boot). The
product ID operation can be terminated by a three-word command sequence or an alternative one-
word command sequence (see Command Definition table).
In the hardware access mode, access to the product ID is activated by forcing #CE and #OE low, #WE
high, and raising A9 to V
HH
(12V
+
/
-
0.5V).
Table of Operating Modes
Operating Mode Selection
(V
HH
= 12V
±
0.5V)
PINS
ADDRESS
A
IN
A
IN
X
X
X
X
X
A0 = V
IL
;
A1
A15 = V
IL
;
A9 = V
HH
A0 = V
IH
;
A1
A15 = V
IL
;
A9 = V
HH
X
MODE
#CE
V
IL
V
IL
V
IH
V
IH
X
X
X
#OE
V
IL
V
IH
X
X
V
IL
X
V
IH
#WE
V
IH
V
IL
X
X
X
V
IH
X
#RESET
V
IH
V
IH
V
IH
V
IH
V
IH
V
IH
V
IH
DQ.
Read
Erase/Program
Standby
Dout
Din
High Z
High Z
High Z/D
OUT
High Z/D
OUT
High Z
Erase/Program
Inhibit
Output Disable
Manufacturer Code
00DA (Hex)
Product ID
V
IL
V
IL
V
IH
V
IH
Device Code
003D (Hex) for bottom
TBD for Top
High Z
Reset
X
X
X
V
IL
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W49L401TT70B | EEPROM |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W49L401TT70B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EEPROM |
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