JPH0486927U - - Google Patents
Info
- Publication number
- JPH0486927U JPH0486927U JP12890990U JP12890990U JPH0486927U JP H0486927 U JPH0486927 U JP H0486927U JP 12890990 U JP12890990 U JP 12890990U JP 12890990 U JP12890990 U JP 12890990U JP H0486927 U JPH0486927 U JP H0486927U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- microprocessor
- circuit
- drive
- input terminal
- 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
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
Description
第１図は本考案に係るマイクロプロセツサの保
護回路の一具体例を示すブロツクダイアグラムで
ある。第２図は従来に於けるマイクロプロセツサ
の具体例を示すブロツクダイアグラムである。第
３図は第２図に示す従来のマイクロプロセツサの
動作を説明する波形図である。
１……バツテリ、第１の電源、２……スイツチ
、３……ダイオード、４……駆動用電源回路、電
源ＩＣ、５……ブースタートランジスタ、６……
スイツチング手段、バツフアトランジスタ、７…
…マイクロプロセツサ、８……入力ＩＣ、９……
コンデンサ、１０……インピーダンス、１１……
電源バスライン、１２……保護手段。
FIG. 1 is a block diagram showing a specific example of a microprocessor protection circuit according to the present invention. FIG. 2 is a block diagram showing a specific example of a conventional microprocessor. FIG. 3 is a waveform diagram illustrating the operation of the conventional microprocessor shown in FIG. 2. 1...Battery, first power supply, 2...Switch, 3...Diode, 4...Drive power supply circuit, power supply IC, 5...Booster transistor, 6...
Switching means, buffer transistor, 7...
...Microprocessor, 8...Input IC, 9...
Capacitor, 10... Impedance, 11...
Power bus line, 12...protection means.
Claims (1)
電源回路に接続されたマイクロプロセツサとが第
１の電源と第２の電源との間に設けられた回路で
あつて、該駆動用電源回路の駆動電源出力端子と
該マイクロプロセツサの駆動電源入力端子とが接
続されたものであり、且つ該マイクロプロセツサ
の入力端子に第１の電源電圧と同等の電圧を有す
る信号が入力されるように構成された回路に於い
て、該回路には、その入力が該第１の電源に接続
され、又、その出力が該マイクロプロセツサの駆
動電源入力端子に接続され、且つその制御端子が
該駆動用電源回路の制御端子に接続されたスイツ
チング手段が設けられていると共に該第１の電源
と該マイクロプロセツサの駆動電源入力端子間に
該スイツチング手段と並列に、所定の電圧降下機
能を有し、且つ第１の電源電圧が該駆動用電源回
路の駆動出力電圧より低くなつた場合に該駆動用
電源回路の電源出力端子から該第１の電源に向け
て電流が流れるのを防止しうる機能を有する保護
手段を設けた事を特徴とするマイクロプロセツサ
の保護回路。 A circuit including a microprocessor driving power supply circuit and a microprocessor connected to the driving power supply circuit is provided between a first power supply and a second power supply; A power supply output terminal and a drive power supply input terminal of the microprocessor are connected, and a signal having a voltage equivalent to the first power supply voltage is input to the input terminal of the microprocessor. The circuit has an input connected to the first power supply, an output connected to the drive power input terminal of the microprocessor, and a control terminal connected to the drive power supply input terminal of the microprocessor. A switching means connected to a control terminal of the power supply circuit is provided and has a predetermined voltage drop function between the first power supply and the drive power input terminal of the microprocessor in parallel with the switching means, and a function capable of preventing current from flowing from the power output terminal of the drive power supply circuit toward the first power supply when the first power supply voltage becomes lower than the drive output voltage of the drive power supply circuit. A protection circuit for a microprocessor, characterized in that it is provided with a protection means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12890990U JPH0486927U (en) | 1990-11-30 | 1990-11-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12890990U JPH0486927U (en) | 1990-11-30 | 1990-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0486927U true JPH0486927U (en) | 1992-07-28 |
Family
ID=31876347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12890990U Pending JPH0486927U (en) | 1990-11-30 | 1990-11-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0486927U (en) |
-
1990
- 1990-11-30 JP JP12890990U patent/JPH0486927U/ja active Pending
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