JPS60184133U - Battery backup memory circuit - Google Patents

Battery backup memory circuit

Info

Publication number
JPS60184133U
JPS60184133U JP6784184U JP6784184U JPS60184133U JP S60184133 U JPS60184133 U JP S60184133U JP 6784184 U JP6784184 U JP 6784184U JP 6784184 U JP6784184 U JP 6784184U JP S60184133 U JPS60184133 U JP S60184133U
Authority
JP
Japan
Prior art keywords
power supply
battery backup
backup memory
memory circuit
circuit
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
Application number
JP6784184U
Other languages
Japanese (ja)
Inventor
石井　重隆
英雄 坂本
Original Assignee
株式会社日立製作所
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 株式会社日立製作所 filed Critical 株式会社日立製作所
Priority to JP6784184U priority Critical patent/JPS60184133U/en
Publication of JPS60184133U publication Critical patent/JPS60184133U/en
Pending legal-status Critical Current

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  • 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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例のブロック図、第２図は本考
案による実施例のタイミングチャートである。 １・・・電源検出回路、２・・・バッテリ充電回路、３
・・・チップセレクト信号用レベル変換回路。FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a timing chart of the embodiment of the present invention. 1... Power supply detection circuit, 2... Battery charging circuit, 3
...Level conversion circuit for chip select signal.

Claims (1)

【実用新案登録請求の範囲】 制御電源の電圧を検出する電源検出回路、補助電源用の
バッテリ充電回路およびメモリより構成されるバッテリ
バックアップメモリ回路において、 前記制御電源の投入およびしゃ断が繰返えされても、チ
ップセレクト信号用レベル変換回路を付加することによ
って、前記メモリ素子の記憶内容が変化することなく正
常な値に保持できるようにしたことを特徴とするバッテ
リバックアップメモリ回路。[Claims for Utility Model Registration] In a battery backup memory circuit comprising a power supply detection circuit for detecting the voltage of a control power supply, a battery charging circuit for an auxiliary power supply, and a memory, the control power supply is repeatedly turned on and off. 1. A battery backup memory circuit characterized in that, by adding a level conversion circuit for a chip select signal, the stored contents of the memory element can be maintained at a normal value without being changed.
JP6784184U 1984-05-11 1984-05-11 Battery backup memory circuit Pending JPS60184133U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6784184U JPS60184133U (en) 1984-05-11 1984-05-11 Battery backup memory circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6784184U JPS60184133U (en) 1984-05-11 1984-05-11 Battery backup memory circuit

Publications (1)

Publication Number Publication Date
JPS60184133U true JPS60184133U (en) 1985-12-06

Family

ID=30602038

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6784184U Pending JPS60184133U (en) 1984-05-11 1984-05-11 Battery backup memory circuit

Country Status (1)

Country Link
JP (1) JPS60184133U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02126490A (en) * 1988-11-04 1990-05-15 Mitsubishi Electric Corp Memory card

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02126490A (en) * 1988-11-04 1990-05-15 Mitsubishi Electric Corp Memory card

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