參數(shù)資料
型號(hào)： 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(yè)數(shù)： 20/26頁(yè)
文件大?。?/td> 193K
代理商： HN58C257A
HN58C256A Series, HN58C257A Series
20
3. Software data protection
To prevent unintentional programming, this device has the software data protection (SDP) mode. The SDP
is enabled by inputting the following 3 bytes code and write data. SDP is not enabled if only the 3 bytes
code is input. To program data in the SDP enable mode, 3 bytes code must be input before write data.
Data
AA
↓
55
↓
A0
↓
Write data }
Address
5555
↓
2AAA
↓
5555
↓
Write address
Normal data input
The SDP mode is disabled by inputting the following 6 bytes code. Note that, if data is input in the SDP
disable cycle, data can not be written.
Data
AA
↓
55
↓
80
↓
AA
↓
55
↓
20
Address
5555
↓
2AAA
↓
5555
↓
5555
↓
2AAA
↓
5555
The software data protection is not enabled at the shipment.
Note:
There are some differences between Hitachi’s and other company’s for enable/disable sequence of
software data protection. If there are any questions , please contact with Hitachi sales offices.
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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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