JPS59142825U - Microcomputer power failure detection circuit - Google Patents
Microcomputer power failure detection circuitInfo
- Publication number
- JPS59142825U JPS59142825U JP3424483U JP3424483U JPS59142825U JP S59142825 U JPS59142825 U JP S59142825U JP 3424483 U JP3424483 U JP 3424483U JP 3424483 U JP3424483 U JP 3424483U JP S59142825 U JPS59142825 U JP S59142825U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- detection circuit
- microcomputer
- power failure
- failure detection
- 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
Landscapes
- Power Sources (AREA)
- Emergency Protection Circuit Devices (AREA)
- Stand-By Power Supply Arrangements (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図は従来のマイコンの制御回路図、第２図は第１図
における各部の電圧波形図、第３図は本考案による一実
施のマイコンの停電検出回路側口、第４図は、第３図に
お１する各部の電圧波形図を示したものである。
Ｃ・・・商用電源を直流定電圧化した電源の電圧検出回
路、Ｄ・・・シュミット回路、１２・・・インバータ、
１０・・・補助直流電源、１・・・マイコン。FIG. 1 is a control circuit diagram of a conventional microcomputer, FIG. 2 is a voltage waveform diagram of each part in FIG. 3 shows a voltage waveform diagram of each part shown in FIG. C... Voltage detection circuit for a power supply that converts commercial power supply into a DC constant voltage, D... Schmitt circuit, 12... Inverter,
10... Auxiliary DC power supply, 1... Microcomputer.
Claims (1)
電源が停止しているときも補助直流電源でマイコンの内
部処理を行なうものにおいて、商用電源の有無を検出す
る電源電圧検出回路Ｃと、商用電源を直流定電圧化した
電源により動作するインバータ１２と、補助直流電源１
０により動作するシュミット回路りとから成り、前記電
源電圧検出回路Ｃ出力を前記インバータ１２に入力し、
該インバータ１２出力を前記シュミット面路りに入力し
、該シュミット回路り出力をマイコン１に入力させるよ
う構成したことを特徴としたマイコンの停電検出回路。In a microcontroller that uses a commercial power supply as a constant DC voltage power supply and uses an auxiliary DC power supply to perform internal processing of the microcomputer even when the commercial power supply is stopped, a power supply voltage detection circuit C that detects the presence or absence of a commercial power supply and a An inverter 12 that operates from a constant voltage DC power source, and an auxiliary DC power source 1
0, and inputs the output of the power supply voltage detection circuit C to the inverter 12,
A power outage detection circuit for a microcomputer, characterized in that the output of the inverter 12 is input to the Schmitt circuit, and the output of the Schmitt circuit is input to the microcomputer 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3424483U JPS59142825U (en) | 1983-03-10 | 1983-03-10 | Microcomputer power failure detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3424483U JPS59142825U (en) | 1983-03-10 | 1983-03-10 | Microcomputer power failure detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59142825U true JPS59142825U (en) | 1984-09-25 |
Family
ID=30165012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3424483U Pending JPS59142825U (en) | 1983-03-10 | 1983-03-10 | Microcomputer power failure detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59142825U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53106524A (en) * | 1977-03-01 | 1978-09-16 | Toshiba Corp | Initial clear unit for digital circuit |
-
1983
- 1983-03-10 JP JP3424483U patent/JPS59142825U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53106524A (en) * | 1977-03-01 | 1978-09-16 | Toshiba Corp | Initial clear unit for digital circuit |
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