JPS5980832U - System reset circuit - Google Patents

System reset circuit

Info

Publication number
JPS5980832U
JPS5980832U JP17393782U JP17393782U JPS5980832U JP S5980832 U JPS5980832 U JP S5980832U JP 17393782 U JP17393782 U JP 17393782U JP 17393782 U JP17393782 U JP 17393782U JP S5980832 U JPS5980832 U JP S5980832U
Authority
JP
Japan
Prior art keywords
transistor
power supply
turned
supply voltage
system reset
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
JP17393782U
Other languages
Japanese (ja)
Inventor
近藤　強司
Original Assignee
株式会社東芝
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 株式会社東芝 filed Critical 株式会社東芝
Priority to JP17393782U priority Critical patent/JPS5980832U/en
Publication of JPS5980832U publication Critical patent/JPS5980832U/en
Pending legal-status Critical Current

Links

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図は従来のシステムリセット回路の一例を示す回路
図、第２図は第１図の動作を説明する図、第３図は本考
案の一実施例を示す回路図、第４図は第３図の動作を説
明する図である。 ＣＰＵ・・・マイクロコンピュータ、Ｔ・・・電源電圧
印加端子、Ｄ・・・ダイオード、ＴＲ１・・・電源瞬断
検出用トランジスタ、ＴＲ２・・・リセットドライバ用
トランジスタ、Ｒ・・・システムリセット端子、Ｒ１＋
　Ｒ２＋Ｒ３，Ｒ４，Ｒ３・・・抵抗、Ｃ，、Ｃ２・・
・コンデンサ。FIG. 1 is a circuit diagram showing an example of a conventional system reset circuit, FIG. 2 is a diagram explaining the operation of FIG. 1, FIG. 3 is a circuit diagram showing an embodiment of the present invention, and FIG. FIG. 3 is a diagram illustrating the operation of FIG. 3; CPU...Microcomputer, T...Power supply voltage application terminal, D...Diode, TR1...Transistor for detecting instantaneous power interruption, TR2...Transistor for reset driver, R...System reset terminal, R1+
R2+R3, R4, R3...Resistance, C,, C2...
・Capacitor.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 電源電圧か供給されるロジックシステムのシステムリセ
ット端子に抵抗及びコンデンサよりなる゛時定数回路を
介して接続された電源電圧印加端子と、この電源電圧印
加端子に加えられる電源電圧か所定レベルになったとき
導通される第１のトランジスタと、この第１のトランジ
スタの導通時に導通され前記時定数回路のコンデンサに
蓄積された電荷を放電する第２のトランジスタとを具備
することを特徴とするシステムリセット回路。A power supply voltage application terminal connected to the system reset terminal of the logic system to which power supply voltage is supplied via a time constant circuit consisting of a resistor and a capacitor, and a power supply voltage applied to this power supply voltage application terminal that reaches a predetermined level. A system reset circuit comprising a first transistor that is turned on when the first transistor is turned on, and a second transistor that is turned on when the first transistor is turned on and discharges the charge accumulated in the capacitor of the time constant circuit. .
JP17393782U 1982-11-17 1982-11-17 System reset circuit Pending JPS5980832U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17393782U JPS5980832U (en) 1982-11-17 1982-11-17 System reset circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17393782U JPS5980832U (en) 1982-11-17 1982-11-17 System reset circuit

Publications (1)

Publication Number Publication Date
JPS5980832U true JPS5980832U (en) 1984-05-31

Family

ID=30378792

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17393782U Pending JPS5980832U (en) 1982-11-17 1982-11-17 System reset circuit

Country Status (1)

Country Link
JP (1) JPS5980832U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS617912A (en) * 1984-06-14 1986-01-14 トムソン‐エル・ジエ・テー・ラボラトワール・ジエネラル・デ・テレコミユニカシオン Apparatus for halting proceding of program during execution in microprocessor and use thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS617912A (en) * 1984-06-14 1986-01-14 トムソン‐エル・ジエ・テー・ラボラトワール・ジエネラル・デ・テレコミユニカシオン Apparatus for halting proceding of program during execution in microprocessor and use thereof

Similar Documents

Publication Publication Date Title
JPS5980832U (en) System reset circuit
JPS6072039U (en) reset circuit
JPS6133128U (en) reset circuit
JPS6090914U (en) FET protection circuit
JPS5821866U (en) level detection device
JPS61622U (en) power control circuit
JPS58105628U (en) interface control device
JPS59118330U (en) Auto-reset circuit for digital circuits
JPS5824837U (en) reset circuit
JPS5917862U (en) Voltage drop detection circuit
JPS5933540U (en) reset circuit
JPS59108927U (en) reset circuit
JPS59108987U (en) Tamper-proof circuit
JPS5949238U (en) CPU reset circuit
JPS5866436U (en) Malfunction prevention circuit for microprocessors, etc.
JPS59130300U (en) Semiconductor memory data content protection device
JPS5881634U (en) Initial circuit of micro processor etc.
JPS6071945U (en) Microcomputer initialization circuit
JPS5871214U (en) Muting signal generation circuit
JPS6057816U (en) Reference voltage supply circuit for D/A converter
JPS60192022U (en) Auto clear circuit
JPS6112122U (en) power protection circuit
JPS6071944U (en) Output terminal control circuit
JPS58190742U (en) Battery voltage monitoring circuit
JPS6031711U (en) Abnormal write prevention device