JPS5980832U - System reset circuit - Google Patents
System reset circuitInfo
- 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
Links
Landscapes
- Electronic Switches (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)
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. .
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)
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 |
-
1982
- 1982-11-17 JP JP17393782U patent/JPS5980832U/en active Pending
Cited By (1)
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 |
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