JPS5876943U - Microcomputer power outage protection device - Google Patents

Microcomputer power outage protection device

Info

Publication number
JPS5876943U
JPS5876943U JP17068381U JP17068381U JPS5876943U JP S5876943 U JPS5876943 U JP S5876943U JP 17068381 U JP17068381 U JP 17068381U JP 17068381 U JP17068381 U JP 17068381U JP S5876943 U JPS5876943 U JP S5876943U
Authority
JP
Japan
Prior art keywords
voltage
microcomputer
output
voltage detector
power outage
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
JP17068381U
Other languages
Japanese (ja)
Inventor
小栗　守
Original Assignee
株式会社東海理化電機製作所
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 株式会社東海理化電機製作所 filed Critical 株式会社東海理化電機製作所
Priority to JP17068381U priority Critical patent/JPS5876943U/en
Publication of JPS5876943U publication Critical patent/JPS5876943U/en
Pending legal-status Critical Current

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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

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

第１図はマイクロコンピュータの停電対策装置のブロッ
ク図、第２図は本考案ρ一実施例のブロック図である。 １・・・ダイオード、２・・・コンデンサ、３・・・電
圧検出器、４・・・ＲＡＭ、５・・・電源スイツチ回路
、６・・・フリップフロップ、７・・・マイクロコンピ
ュータ、８・・・電圧調整回路。FIG. 1 is a block diagram of a power outage countermeasure device for a microcomputer, and FIG. 2 is a block diagram of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Diode, 2... Capacitor, 3... Voltage detector, 4... RAM, 5... Power switch circuit, 6... Flip-flop, 7... Microcomputer, 8... ...Voltage adjustment circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ダイオードを通してコンデンサを充電しコンデ□ンサの
電圧を電源電圧として出力し入力電圧の低下速度を遅ら
せる遅延回路と、前記入力電圧が設定電圧以下に低下し
たことを検出する電圧検出器と、使用中のデータを記憶
しシステムが停止中もそのデータを保存する不揮発性Ｒ
ＡＭと、前記電源電圧をオン・オフする電源スイツチ回
路と、前記電圧検出器の出力を割込み信号としてデータ
を前記不揮発性ＲＡＭに退避し該退避終了時出力を発す
るマイクロコンピュータと、前記電圧検出器の出力およ
び前記マイクロコンピュータからの退避終了信号の入力
時に前記電源スイツチ回路をオフ状態にするフリップフ
ロップとを備えてなり、前記電圧検出器の出力の解消時
に不揮発性ＲＡＭからのデータを読込むことを特徴とす
るマイクロコンピュータの停電対策装置。A delay circuit that charges the capacitor through a diode and outputs the voltage of the capacitor as the power supply voltage to slow down the rate of input voltage drop; a voltage detector that detects when the input voltage has dropped below a set voltage; Non-volatile R that stores data and preserves it even when the system is stopped
AM, a power switch circuit that turns on and off the power supply voltage, a microcomputer that uses the output of the voltage detector as an interrupt signal to save data to the nonvolatile RAM and outputs an output when the saving is completed, and the voltage detector. and a flip-flop that turns off the power switch circuit upon input of the save end signal from the microcomputer, and reads data from the nonvolatile RAM when the output of the voltage detector is canceled. A microcomputer power outage countermeasure device featuring:
JP17068381U 1981-11-18 1981-11-18 Microcomputer power outage protection device Pending JPS5876943U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17068381U JPS5876943U (en) 1981-11-18 1981-11-18 Microcomputer power outage protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17068381U JPS5876943U (en) 1981-11-18 1981-11-18 Microcomputer power outage protection device

Publications (1)

Publication Number Publication Date
JPS5876943U true JPS5876943U (en) 1983-05-24

Family

ID=29962631

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17068381U Pending JPS5876943U (en) 1981-11-18 1981-11-18 Microcomputer power outage protection device

Country Status (1)

Country Link
JP (1) JPS5876943U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04281507A (en) * 1991-03-08 1992-10-07 Fujitsu Ltd Processor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04281507A (en) * 1991-03-08 1992-10-07 Fujitsu Ltd Processor

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