JPS6419401A - Electronic controller - Google Patents
Electronic controllerInfo
- Publication number
- JPS6419401A JPS6419401A JP62176870A JP17687087A JPS6419401A JP S6419401 A JPS6419401 A JP S6419401A JP 62176870 A JP62176870 A JP 62176870A JP 17687087 A JP17687087 A JP 17687087A JP S6419401 A JPS6419401 A JP S6419401A
- Authority
- JP
- Japan
- Prior art keywords
- backup ram
- control data
- data
- control
- inverted
- 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
- 239000000284 extract Substances 0.000 abstract 2
- 230000005856 abnormality Effects 0.000 abstract 1
Landscapes
- Combined Controls Of Internal Combustion Engines (AREA)
- Safety Devices In Control Systems (AREA)
Abstract
PURPOSE:To use a small-capacity backup RAM and to confirm whether control data recorded in the backup RAM is correct or not by extracting partial bits of control data and setting the value, which is obtained by inverting each bit of extracted data, as inverted data. CONSTITUTION:When a control data storing means M2 stores control data in a backup RAM M1, an inverted data storing means M3 extracts and inverts partial bits of this control data and stores the result in the backup RAM M1. At the time of execution of the control, a judging means M4 extracts partial bits corresponding to inverted data from control data recorded in the backup RAM M1 and discriminates whether this extracted data coincides with the value of inverted data in the backup RAM M1 or not; and if it is judged that they coincide with each other, a controlled variable calculating means M5 uses control data in the backup RAM M1 to calculate a controlled variable. Thus, the abnormality of control data is detected to prevent erroneous control though the small-capacity backup RAM M1 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62176870A JPS6419401A (en) | 1987-07-15 | 1987-07-15 | Electronic controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62176870A JPS6419401A (en) | 1987-07-15 | 1987-07-15 | Electronic controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6419401A true JPS6419401A (en) | 1989-01-23 |
Family
ID=16021235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62176870A Pending JPS6419401A (en) | 1987-07-15 | 1987-07-15 | Electronic controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6419401A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02259902A (en) * | 1989-03-31 | 1990-10-22 | Mazda Motor Corp | Data holding device for on-vehicle control equipment |
| US6295589B1 (en) | 1998-08-25 | 2001-09-25 | Unisia Jecs Corporation | Apparatus and method prohibiting RAM diagnosis when other units may access RAM |
| US6490697B1 (en) | 1998-08-27 | 2002-12-03 | Unisia Jecs Corporation | Diagnosing apparatus and method for RAM |
| JP2004531819A (en) * | 2001-05-10 | 2004-10-14 | ギーゼッケ ウント デフリエント ゲーエムベーハー | Method for protecting a computer from manipulation of register contents and computer for implementing the method |
| JP2008117385A (en) * | 2006-11-07 | 2008-05-22 | Samsung Electronics Co Ltd | Apparatus and method for managing security data |
-
1987
- 1987-07-15 JP JP62176870A patent/JPS6419401A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02259902A (en) * | 1989-03-31 | 1990-10-22 | Mazda Motor Corp | Data holding device for on-vehicle control equipment |
| US6295589B1 (en) | 1998-08-25 | 2001-09-25 | Unisia Jecs Corporation | Apparatus and method prohibiting RAM diagnosis when other units may access RAM |
| US6490697B1 (en) | 1998-08-27 | 2002-12-03 | Unisia Jecs Corporation | Diagnosing apparatus and method for RAM |
| JP2004531819A (en) * | 2001-05-10 | 2004-10-14 | ギーゼッケ ウント デフリエント ゲーエムベーハー | Method for protecting a computer from manipulation of register contents and computer for implementing the method |
| JP2008117385A (en) * | 2006-11-07 | 2008-05-22 | Samsung Electronics Co Ltd | Apparatus and method for managing security data |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES2005933A6 (en) | Electronic thermometer. | |
| KR880011649A (en) | Data Processing System and Processing Method | |
| JPS57207958A (en) | Data correcting device | |
| JPS6419401A (en) | Electronic controller | |
| JPS5694597A (en) | Memory data control system | |
| JPS5776645A (en) | Electronic desk-top calculator | |
| JPS53114325A (en) | Control system of data processor | |
| JPS56144989A (en) | Margin setter | |
| JPS5527919A (en) | Time setting system | |
| JPS5624592A (en) | Time setting system | |
| JPS5462740A (en) | Input-output controller | |
| JPS5634264A (en) | Code detecting circuit | |
| JPS55901A (en) | Data buffer control system | |
| JPS57197653A (en) | Control device of microprogram | |
| Vaandrager | Some observations on redundancy in a context | |
| JPS56121152A (en) | Monitor system of computer program | |
| JPS5719869A (en) | Input information processor | |
| JPS56134398A (en) | Check system for error detecting and correcting circuit | |
| JPS57166728A (en) | Discriminating circuit for pulse repetition period | |
| JPS5457912A (en) | Error display system | |
| JPS6488649A (en) | Microcomputer system | |
| JPS5621258A (en) | Failure storage system in central processing unit | |
| JPS6481512A (en) | Control method of electronic volume | |
| JPS56110130A (en) | Priority concurrent circuit | |
| JPS57157174A (en) | Delay control circuit |