JPH0179146U - - Google Patents
Info
- Publication number
- JPH0179146U JPH0179146U JP1987175410U JP17541087U JPH0179146U JP H0179146 U JPH0179146 U JP H0179146U JP 1987175410 U JP1987175410 U JP 1987175410U JP 17541087 U JP17541087 U JP 17541087U JP H0179146 U JPH0179146 U JP H0179146U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- microcomputer
- value
- vehicle
- power source
- 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
- 238000001514 detection method Methods 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案に係る車載マイクロ・コンピユ
ータのデータ保持装置の全体構成を概略的に示す
ブロツク図、第２図は該装置の動作を示すフロー
・チヤート及び第３図は該動作を説明する波形図
である。
１０……制御ユニツト、１２……マイクロ・コ
ンピユータ、１４……センサ、１６……入力処理
回路、１８……出力処理回路、２０……アクチユ
エータ、２４……バツテリ電源、２８……定電圧
回路、２８ａ……レギユレータ、２８ｂ……分圧
回路、２８ｃ……コンパレータ、３２……イグニ
シヨンスイツチ、３４……低電圧検出回路、４０
……インバータ、Ｔｒ１，Ｔｒ２……トランジス
タ、Ｒ１，Ｒ２，Ｒ３，Ｒ４……抵抗。
FIG. 1 is a block diagram schematically showing the overall configuration of a data holding device for an on-vehicle microcomputer according to the present invention, FIG. 2 is a flow chart showing the operation of the device, and FIG. 3 is an explanation of the operation. FIG. 10... Control unit, 12... Micro computer, 14... Sensor, 16... Input processing circuit, 18... Output processing circuit, 20... Actuator, 24... Battery power supply, 28... Constant voltage circuit, 28a...Regulator, 28b...Voltage dividing circuit, 28c...Comparator, 32...Ignition switch, 34...Low voltage detection circuit, 40
... Inverter, Tr 1 , Tr 2 ... Transistor, R 1 , R 2 , R 3 , R 4 ... Resistor.
Claims (1)
ロ・コンピユータと、 ｃ 前記電源からマイクロ・コンピユータに供給
される電圧を所定値に安定化する定電圧回路と、 及び ｄ 該電源の電圧低下を監視する低電圧検出回路
と、 を具備し、該定電圧回路は電圧低下が検出された
場合には其の出力電圧を前記所定値より低い値に
切り換える如く構成したことを特徴とする車載マ
イクロ・コンピユータのデータ保持装置。[Scope of Claim for Utility Model Registration] a. A power source mounted on a vehicle; b. A microcomputer containing a storage device that stores data; and c. Stabilizing the voltage supplied to the microcomputer from the power source to a predetermined value. and (d) a low voltage detection circuit that monitors a voltage drop of the power supply, and the constant voltage circuit lowers its output voltage to a value lower than the predetermined value when a voltage drop is detected. A data holding device for an on-vehicle microcomputer, characterized in that it is configured to switch to a value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987175410U JPH0179146U (en) | 1987-11-16 | 1987-11-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987175410U JPH0179146U (en) | 1987-11-16 | 1987-11-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0179146U true JPH0179146U (en) | 1989-05-26 |
Family
ID=31467204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987175410U Pending JPH0179146U (en) | 1987-11-16 | 1987-11-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0179146U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015072646A (en) * | 2013-10-04 | 2015-04-16 | コニカミノルタ株式会社 | Control device and image forming apparatus |
-
1987
- 1987-11-16 JP JP1987175410U patent/JPH0179146U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015072646A (en) * | 2013-10-04 | 2015-04-16 | コニカミノルタ株式会社 | Control device and image forming apparatus |
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