JPS5984642U - Data content protection circuit for semiconductor memory - Google Patents
Data content protection circuit for semiconductor memoryInfo
- Publication number
- JPS5984642U JPS5984642U JP17959082U JP17959082U JPS5984642U JP S5984642 U JPS5984642 U JP S5984642U JP 17959082 U JP17959082 U JP 17959082U JP 17959082 U JP17959082 U JP 17959082U JP S5984642 U JPS5984642 U JP S5984642U
- Authority
- JP
- Japan
- Prior art keywords
- semiconductor memory
- protection circuit
- content protection
- power
- data content
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004065 semiconductor Substances 0.000 title claims description 10
- 238000010586 diagram Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 1
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- Power Sources (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
−第１図は従来の半導体メモリのデータ内容保護回路図
、第２図は本考案の半導体メモリのデータ。
内容保護回路図、第３図は停電復帰時或いは電源投入時
の電源電圧と、リセット端子電圧の変化図である。
７・・・・・・半導体メモリ、９・・・・・・停電保護
回路、１０・・・・・・マイクロコンピュータ、１１・
・・・・・リセット回路、Ｔｒ６・・、・・・・トラン
ジスタ。- Fig. 1 is a data content protection circuit diagram of a conventional semiconductor memory, and Fig. 2 is a data content protection circuit diagram of a semiconductor memory of the present invention. The content protection circuit diagram, FIG. 3, is a diagram showing changes in power supply voltage and reset terminal voltage at the time of recovery from a power failure or power on. 7...Semiconductor memory, 9...Power failure protection circuit, 10...Microcomputer, 11.
...Reset circuit, Tr6..., ...transistor.
Claims (1)
イネーブル端子をもつ半導体メモリと、前記半導体メモ
リにデータを書き込んだり、データの読み出しを行うマ
イクロコンピュータと、停電時に前記半導体メモリに一
定電圧を供給する充゛ 電可能な電池と、停電時に
前記半導体メモリのデータを保護し停電時以外に前記電
池を充電する停電保護回路と、電源投入時に前記マイク
ロコンピュータをリセットするリセット回路と、前記リ
セット回路の出力により０Ｎ１０ＦＦ し、前記半導体
メモリのチップイネーブル端子に信号を与えるトランジ
スタから成る半導体メモリのデータ内容保護回路。A semiconductor memory has a chip enable terminal that stores numerical values and selects its own operation/non-operation, a microcomputer that writes data to and reads data from the semiconductor memory, and a constant voltage that is applied to the semiconductor memory during a power outage. A rechargeable battery to be supplied, a power failure protection circuit that protects data in the semiconductor memory in the event of a power outage and charges the battery at times other than power outages, a reset circuit that resets the microcomputer when power is turned on, and the reset circuit. 1. A data content protection circuit for a semiconductor memory comprising a transistor which is set to 0N10FF by the output of the transistor and supplies a signal to a chip enable terminal of the semiconductor memory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17959082U JPS5984642U (en) | 1982-11-27 | 1982-11-27 | Data content protection circuit for semiconductor memory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17959082U JPS5984642U (en) | 1982-11-27 | 1982-11-27 | Data content protection circuit for semiconductor memory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5984642U true JPS5984642U (en) | 1984-06-07 |
Family
ID=30389617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17959082U Pending JPS5984642U (en) | 1982-11-27 | 1982-11-27 | Data content protection circuit for semiconductor memory |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5984642U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6344296U (en) * | 1986-09-09 | 1988-03-24 |
-
1982
- 1982-11-27 JP JP17959082U patent/JPS5984642U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6344296U (en) * | 1986-09-09 | 1988-03-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS59130300U (en) | Semiconductor memory data content protection device | |
| JPS59130129U (en) | Backup power supply circuit for semiconductor memory elements | |
| JPS5999300U (en) | Semiconductor memory battery backup device | |
| JPS6125051U (en) | Backup power supply circuit | |
| JPS5860399U (en) | Semiconductor memory power failure protection circuit | |
| JPS59187837U (en) | Reset device | |
| JPS6065832U (en) | Memory backup circuit | |
| JPS6082327U (en) | computer power supply circuit | |
| JPS58172339U (en) | power supply | |
| JPS5915131U (en) | Memory backup power supply circuit | |
| JPS5923822U (en) | Power outage compensation reset circuit | |
| JPS60158348U (en) | power circuit | |
| JPS5996609U (en) | Reset circuit for microcomputers, etc. | |
| JPS6085799U (en) | semiconductor equipment | |
| JPS5981233U (en) | Protective relay output relay circuit | |
| JPS61196325U (en) | ||
| JPS5828533U (en) | Momentary power failure detection circuit | |
| JPS5928723U (en) | Data protection circuit for semiconductor memory | |
| JPS60155213U (en) | Input stage transistor protection circuit for electronic circuits | |
| JPS583748U (en) | voltage monitoring device | |
| JPS6132751U (en) | power backup device | |
| JPS6112126U (en) | CPU reset circuit | |
| JPS60103234U (en) | Electronic cash register power supply circuit | |
| JPS59183149U (en) | charging circuit | |
| JPS60114533U (en) | Battery protection circuit for power outage compensation |