JPH0187426U - - Google Patents
Info
- Publication number
- JPH0187426U JPH0187426U JP18080087U JP18080087U JPH0187426U JP H0187426 U JPH0187426 U JP H0187426U JP 18080087 U JP18080087 U JP 18080087U JP 18080087 U JP18080087 U JP 18080087U JP H0187426 U JPH0187426 U JP H0187426U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- microcomputer
- circuit
- power supply
- reset signal
- 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 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Description
第１図はこの考案の一実施例によるマイクロコ
ンピユータのリセツト回路の構成図、第２図は同
実施例において電源をＯＮ／ＯＦＦした場合のリ
セツト回路の動作を示すタイムチヤート、第３図
は同実施例において電源電圧が下降して行く過程
における各部の電圧変動を表したタイムチヤート
、第４図は従来のマイクロコンピユータのリセツ
ト回路の構成図、第５図はリセツト信号発生回路
の例を示す回路図、第６図は従来のマイクロコン
ピユータのリセツト回路において電源をＯＮ／Ｏ
ＦＦした場合のリセツト回路の動作を示すタイム
チヤート、第７図は従来のマイクロコンピユータ
のリセツト回路において電源電圧が下降して行く
過程における各部の電圧変動を表したタイムチヤ
ートである。
２……整流回路、３……レギユレータ、４……
マイクロコンピユータ、５１……分圧回路、６…
…リセツト信号発生回路。
Fig. 1 is a configuration diagram of a reset circuit of a microcomputer according to an embodiment of this invention, Fig. 2 is a time chart showing the operation of the reset circuit when the power is turned on and off in the same embodiment, and Fig. 3 is the same. In the example, a time chart showing voltage fluctuations in various parts as the power supply voltage decreases, Fig. 4 is a configuration diagram of a conventional microcomputer reset circuit, and Fig. 5 is a circuit showing an example of a reset signal generation circuit. Figure 6 shows how to turn on/off the power in a conventional microcomputer reset circuit.
FIG. 7 is a time chart showing the operation of the reset circuit in the case of FF. FIG. 7 is a time chart showing the voltage fluctuations of various parts in the process of decreasing the power supply voltage in the reset circuit of a conventional microcomputer. 2... Rectifier circuit, 3... Regulator, 4...
Microcomputer, 51...Voltage dividing circuit, 6...
...Reset signal generation circuit.
Claims (1)
リーズレギユレータから電源供給を受けるマイク
ロコンピユータに対し、前記マイクロコンピユー
タが前記シリーズレギユレータから受ける電源電
圧の変動に応じて前記マイクロコンピユータにリ
セツト信号を供給するマイクロコンピユータのリ
セツト回路において、前記非安定化電源電圧の分
圧を出力する分圧回路と、この分圧回路の出力電
圧を受け、この出力電圧が所定の電圧値以下にな
つた時に前記マイクロコンピユータに対してリセ
ツト信号を供給するリセツト信号発生回路とから
なるマイクロコンピユータのリセツト回路。 (2) 前記リセツト信号発生回路が入力応答にヒ
ステリシス特性を有する事を特徴とする実用新案
登録請求の範囲第１項記載のマイクロコンピユー
タのリセツト回路。[Claims for Utility Model Registration] (1) For a microcomputer that receives power from a series regulator that stabilizes and outputs an unregulated power supply voltage, the power supply voltage that the microcomputer receives from the series regulator is A reset circuit of the microcomputer that supplies a reset signal to the microcomputer in response to fluctuations includes a voltage divider circuit that outputs a divided voltage of the unregulated power supply voltage, and a voltage divider circuit that receives the output voltage of this voltage divider circuit and outputs a divided voltage of the unregulated power supply voltage. a reset signal generating circuit for supplying a reset signal to the microcomputer when the voltage drops below a predetermined voltage value. (2) The reset circuit for a microcomputer according to claim 1, wherein the reset signal generating circuit has a hysteresis characteristic in its input response.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18080087U JPH0187426U (en) | 1987-11-27 | 1987-11-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18080087U JPH0187426U (en) | 1987-11-27 | 1987-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0187426U true JPH0187426U (en) | 1989-06-09 |
Family
ID=31472306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18080087U Pending JPH0187426U (en) | 1987-11-27 | 1987-11-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0187426U (en) |
-
1987
- 1987-11-27 JP JP18080087U patent/JPH0187426U/ja active Pending
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