JPS5881634U - Initial circuit of micro processor etc. - Google Patents
Initial circuit of micro processor etc.Info
- Publication number
- JPS5881634U JPS5881634U JP17351681U JP17351681U JPS5881634U JP S5881634 U JPS5881634 U JP S5881634U JP 17351681 U JP17351681 U JP 17351681U JP 17351681 U JP17351681 U JP 17351681U JP S5881634 U JPS5881634 U JP S5881634U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- time constant
- terminal
- micro processor
- 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
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図及び第２図はいずれも従来例に係り、第１図は回
路図、第２図は動作波形図である。第３図及び第４図は
いずれも本考案に係り、第３図は回路図、第４図は動作
波形図である。
Ｂ・・・・・・電源端子、２・・・・・・ツェナダイオ
ード、Ｔ１・・・・・・スイッチングトランジスタ、Ｒ
４・・・・・・抵抗、Ｃ・・・・・・コンデシサ、Ｔ２
・・・・・・スイッチングトランジスタ、Ｍ・・・・・
・マイクロプロセッサ。Both FIGS. 1 and 2 relate to conventional examples, with FIG. 1 being a circuit diagram and FIG. 2 being an operating waveform diagram. Both FIGS. 3 and 4 relate to the present invention, with FIG. 3 being a circuit diagram and FIG. 4 being an operating waveform diagram. B...Power supply terminal, 2...Zena diode, T1...Switching transistor, R
4... Resistor, C... Capacitor, T2
...Switching transistor, M...
・Microprocessor.
Claims (1)
を検知する定電圧素子と、該素子の出力によりトリガさ
れイニシャル設定端子をアースする第１のスイッチ素子
と、電源端子とアース間に接続され、電源投入後電源電
圧が前記所定値に到る時間より長い充電時定数を持つＣ
Ｒ時定数回路と、この時定数回路を形成するコンデンサ
の端子電圧によりトリガされ前記イニシャル設定端子を
アースする第２のスイッチ素子を備えるマイクロプロセ
ッサ等のイニシャル回路。A constant voltage element that detects that the transient rising voltage when the power is turned on reaches a predetermined value Vz, a first switch element that is triggered by the output of the element and grounds the initial setting terminal, and a connection between the power supply terminal and the ground. and has a charging time constant longer than the time required for the power supply voltage to reach the predetermined value after the power is turned on.
An initial circuit for a microprocessor or the like comprising an R time constant circuit and a second switch element that is triggered by a terminal voltage of a capacitor forming the time constant circuit and grounds the initial setting terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17351681U JPS5881634U (en) | 1981-11-20 | 1981-11-20 | Initial circuit of micro processor etc. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17351681U JPS5881634U (en) | 1981-11-20 | 1981-11-20 | Initial circuit of micro processor etc. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5881634U true JPS5881634U (en) | 1983-06-02 |
Family
ID=29965381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17351681U Pending JPS5881634U (en) | 1981-11-20 | 1981-11-20 | Initial circuit of micro processor etc. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5881634U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4817886U (en) * | 1971-07-10 | 1973-02-28 |
-
1981
- 1981-11-20 JP JP17351681U patent/JPS5881634U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4817886U (en) * | 1971-07-10 | 1973-02-28 |
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