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參數(shù)資料
| 型號(hào)： | HN58V257AT-12 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 256k EEPROM (32-kword x 8-bit) Ready/Busy and RES function (HN58V257A) |
| 中文描述： | 256k的EEPROM（32 KWord的× 8位）就緒/忙和RES功能（HN58V257A） |
| 文件頁數(shù)： | 18/24頁 |
| 文件大?。?/td> | 118K |
| 代理商： | HN58V257AT-12 |
HN58V256A Series, HN58V257A Series
18
2. Data Protection at V
CC
On/Off
When V
CC
is turned on or off, noise on the control pins generated by external circuits (CPU, etc) may act as a
trigger and turn the EEPROM to program mode by mistake. To prevent this unintentional programming, the
EEPROM must be kept in an unprogrammable state while the CPU is in an unstable state.
Note:
The EPROM should be kept in unprogrammable state during V
CC
on/off by using CPU RESET signal.
V
CC
CPU
RESET
Unprogrammable
Unprogrammable
*
*
(1) Protection by
CE
,
OE
,
WE
To realize the unprogrammable state, the input level of control pins must be held as shown in the table below.
CE
OE
WE
×
: Don’t care.
V
CC
: Pull-up to V
CC
level.
V
SS
: Pull-down to V
SS
level.
V
CC
×
×
×
×
×
V
SS
×
V
CC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HN58V257A | 256k EEPROM (32-kword ×8-bit)(256k EEPROM (32k字 ×8位)) |
| HN58V65AI | 64 k EEPROM (8-kword ×8-bit)(64 k EEPROM (8k字 ×8位)) |
| HN58V66AI | 64 k EEPROM (8-kword ×8-bit)(64 k EEPROM (8k字 ×8位)) |
| HN58V65AP-10 | 64 k EEPROM (8-kword x 8-bit) Ready/Busy function, RES function (HN58V66A) |
| HN58V66AP-10 | 64 k EEPROM (8-kword x 8-bit) Ready/Busy function, RES function (HN58V66A) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HN58V257AT12E | 制造商:Renesas Electronics 功能描述:Tray 制造商:Renesas Electronics Corporation 功能描述:EEPROM,Parallel,256K,3V,120ns,TSOP32 制造商:Renesas 功能描述:EEPROM Parallel 256K-Bit 32K x 8 3V 32-Pin TSOP |
| HN58V257AT-12E | 制造商:Renesas 功能描述:EEPROM Parallel 256K-Bit 32K x 8 3V 32-Pin TSOP |
| HN58V257R-30 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 EEPROM |
| HN58V257R-35 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 EEPROM |
| HN58V257SERIES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 EEPROM |
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