JPS6071945U - Microcomputer initialization circuit - Google Patents
Microcomputer initialization circuitInfo
- Publication number
- JPS6071945U JPS6071945U JP16255183U JP16255183U JPS6071945U JP S6071945 U JPS6071945 U JP S6071945U JP 16255183 U JP16255183 U JP 16255183U JP 16255183 U JP16255183 U JP 16255183U JP S6071945 U JPS6071945 U JP S6071945U
- Authority
- JP
- Japan
- Prior art keywords
- microcomputer
- resistor
- circuit
- capacitor
- power supply
- 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４１マイクロコンピュータのイニシャライズ回
路の従来例を示す回路図、第２図は本考案の一実施例を
示す回路図である。
ＭＣ・・・・・・マイクロコンピュータ、Ｃ・・・・・
・コンデンサ、Ｒ４−Ｒ４・・・・・・抵抗、Ｄ・・・
・・・ダイオード、Ｑ・・・・・・トランジスタ、ＺＤ
・・・・・・ツェナダイオード。1. FIG. 41 is a circuit diagram showing a conventional example of an initialization circuit for a microcomputer, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. MC...Microcomputer, C...
・Capacitor, R4-R4... Resistor, D...
...Diode, Q...Transistor, ZD
...Zena diode.
Claims (1)
充電回路及びトランジスタの直列回路を接続して、その
充電回路のコンデンサ及び抵抗の接続点をマイクロコン
ピュータのイニシャライズ−信号入力端子に接続し、前
記充電回路の抵抗にダイオードを逆極性にして並列に接
続するとともに前記充電回路に抵抗を並列に接続して前
記コンデンサの放電路を形成し、かつ前記マイクロコン
ピュータへ供給する電源電圧を検出する電圧検出回路を
設けてその電源電圧が予め設定した所定値以上のときの
み前記トランジスタをオンさせるようにしたことを特徴
とするマイクロコンピュータのイニシャライズ回路。A charging circuit of a capacitor and a resistor and a series circuit of a transistor are connected between the power supply terminals of the microcomputer, and the connecting point of the capacitor and the resistor of the charging circuit is connected to the initialization signal input terminal of the microcomputer. A voltage detection circuit is provided, in which a diode of reverse polarity is connected to a resistor in parallel, a resistor is connected in parallel to the charging circuit to form a discharge path for the capacitor, and the voltage detection circuit detects a power supply voltage supplied to the microcomputer. An initialization circuit for a microcomputer, characterized in that the transistor is turned on only when the power supply voltage is equal to or higher than a predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16255183U JPS6071945U (en) | 1983-10-20 | 1983-10-20 | Microcomputer initialization circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16255183U JPS6071945U (en) | 1983-10-20 | 1983-10-20 | Microcomputer initialization circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6071945U true JPS6071945U (en) | 1985-05-21 |
Family
ID=30356919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16255183U Pending JPS6071945U (en) | 1983-10-20 | 1983-10-20 | Microcomputer initialization circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6071945U (en) |
-
1983
- 1983-10-20 JP JP16255183U patent/JPS6071945U/en active Pending
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