JPS61138030U - - Google Patents
Info
- Publication number
- JPS61138030U JPS61138030U JP1975585U JP1975585U JPS61138030U JP S61138030 U JPS61138030 U JP S61138030U JP 1975585 U JP1975585 U JP 1975585U JP 1975585 U JP1975585 U JP 1975585U JP S61138030 U JPS61138030 U JP S61138030U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- capacitor
- power supply
- microcomputer
- power
- 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
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Description
第１図は本考案の一実施例におけるマイコンの
リセツト回路の回路図、第２図は第１図の要部波
形図、第３図は従来のリセツト回路の回路図、第
４図は第３図の要部波形図である。
１……電源回路、２……マイコン、３……時定
数回路、Ｃ１〜Ｃ３……第１〜第３コンデンサ、
Ｔｒ１〜Ｔｒ４……第１〜第４トランジスタ、Ｚ
Ｄ……ツエナーダイオード。
Fig. 1 is a circuit diagram of a microcomputer reset circuit in an embodiment of the present invention, Fig. 2 is a waveform diagram of the main part of Fig. 1, Fig. 3 is a circuit diagram of a conventional reset circuit, and Fig. 4 is a circuit diagram of a conventional reset circuit. FIG. 1... Power supply circuit, 2... Microcomputer, 3... Time constant circuit, C1 to C3 ... First to third capacitors,
Tr 1 to Tr 4 ...first to fourth transistors, Z
D...Zener diode.
Claims (1)
給する電源回路と、該電源回路に接続され、コン
デンサを含む時定数回路と、該コンデンサの電圧
を検出し、この電圧が所定値を越えたときに信号
を出力する電圧検出回路と、該電圧検出回路から
の信号に基づいて、前記マイクロコンピユータを
リセツトするリセツト信号を作成するリセツト信
号作成回路と、前記電源回路の電源遮断と同時に
前記コンデンサを瞬時に放電せしめる放電回路と
を備えるマイクロコンピユータリセツト回路。 A power supply circuit that supplies DC power for operation to the microcomputer, a time constant circuit that is connected to the power supply circuit and includes a capacitor, and a time constant circuit that detects the voltage of the capacitor and outputs a signal when this voltage exceeds a predetermined value. A voltage detection circuit for outputting, a reset signal generation circuit for generating a reset signal for resetting the microcomputer based on the signal from the voltage detection circuit, and instantaneously discharging the capacitor at the same time as the power to the power supply circuit is cut off. A microcomputer reset circuit comprising a discharge circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1975585U JPS61138030U (en) | 1985-02-14 | 1985-02-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1975585U JPS61138030U (en) | 1985-02-14 | 1985-02-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61138030U true JPS61138030U (en) | 1986-08-27 |
Family
ID=30509620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1975585U Pending JPS61138030U (en) | 1985-02-14 | 1985-02-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61138030U (en) |
-
1985
- 1985-02-14 JP JP1975585U patent/JPS61138030U/ja active Pending