參數(shù)資料
型號： HN58C257A
廠商： Hitachi,Ltd.
英文描述： 256 k EEPROM (32-kword ×8-bit)(256k EEPROM (32k字 ×8位))
中文描述： 256畝的EEPROM（32 KWord的× 8位）（256k的EEPROM（32K的字× 8位））
文件頁數(shù)： 18/26頁
文件大小： 193K
代理商： HN58C257A
HN58C256A Series, HN58C257A 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 EEPROM 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
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HN58C257ASERIES 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 EEPROM
HN58C257AT-10 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:256k EEPROM (32-kword x 8-bit) Ready/Busy and RES function (HN58C257A)
HN58C257AT10E 制造商:Renesas Electronics 功能描述:Tray 制造商:Renesas Electronics Corporation 功能描述:EEPROM,Parallel,256K,5.0V,100ns,TSOP32 制造商:Renesas 功能描述:EEPROM Parallel 256K-bit 32K x 8 5V 32-Pin TSOP Tray
HN58C257AT-85 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:256k EEPROM (32-kword x 8-bit) Ready/Busy and RES function (HN58C257A)
HN58C257AT85E 制造商:Renesas Electronics 功能描述:Tray 制造商:Renesas Electronics Corporation 功能描述:EEPROM,Parallel,256K,5.0V,85ns,TSOP32 制造商:Renesas 功能描述:EEPROM Parallel 256K-bit 32K x 8 5V 32-Pin TSOP Tray
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