JPS5583945A - Abnormal action preventing system for unit controlled by microcomputer - Google Patents
Abnormal action preventing system for unit controlled by microcomputerInfo
- Publication number
- JPS5583945A JPS5583945A JP15776878A JP15776878A JPS5583945A JP S5583945 A JPS5583945 A JP S5583945A JP 15776878 A JP15776878 A JP 15776878A JP 15776878 A JP15776878 A JP 15776878A JP S5583945 A JPS5583945 A JP S5583945A
- Authority
- JP
- Japan
- Prior art keywords
- microcomputer
- gate
- order code
- address
- 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
Landscapes
- Debugging And Monitoring (AREA)
Abstract
PURPOSE: To prevent the fault caused by the malfunction of the microcomputer by securing the non-operation state automatically for both ROM and RAM as well as the generation of the prescribed order code in case the unused address is designated under operation of the unit with which the processing capacity of CPU covers even the unused address region.
CONSTITUTION: With malfunction of the microcomputer, the high level is secured for address lines A13WA15 which are never used originally for the control of the operation of the unit along with the output of the high-level signal to OR gate O1. This signal makes ROM inactive as well as RAM. And the signal is set to the low level via inverter I2 to be applied to OR gate O2. When the output of gate O2 is at the low level, gates T0WT7 of the tristate send the order code set by SW0WSW7 to the data bus. At CPU the jumping is given to the address containing the process routine of the abnormal addressing with reception of the order code.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15776878A JPS5583945A (en) | 1978-12-19 | 1978-12-19 | Abnormal action preventing system for unit controlled by microcomputer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15776878A JPS5583945A (en) | 1978-12-19 | 1978-12-19 | Abnormal action preventing system for unit controlled by microcomputer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5583945A true JPS5583945A (en) | 1980-06-24 |
Family
ID=15656878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15776878A Pending JPS5583945A (en) | 1978-12-19 | 1978-12-19 | Abnormal action preventing system for unit controlled by microcomputer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5583945A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57157360A (en) * | 1981-03-25 | 1982-09-28 | Toshiba Corp | Mis-operation detecting system for data |
JPS581245A (en) * | 1981-06-26 | 1983-01-06 | Fujitsu Ltd | Branch address producing method |
JPS5829052A (en) * | 1981-08-12 | 1983-02-21 | Hitachi Ltd | Microcomputer device with malfunction preventing function |
JPS5837759A (en) * | 1981-08-28 | 1983-03-05 | Toshiba Corp | Electronic desk top calculator with melody |
WO1983003888A1 (en) * | 1982-05-04 | 1983-11-10 | Matsushita Electric Industrial Co., Ltd. | Cooking device |
JPS6048545A (en) * | 1983-08-26 | 1985-03-16 | Nec Corp | Microcomputer |
JPS61118833A (en) * | 1984-11-14 | 1986-06-06 | Fujitsu Ltd | Audio response unit |
-
1978
- 1978-12-19 JP JP15776878A patent/JPS5583945A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57157360A (en) * | 1981-03-25 | 1982-09-28 | Toshiba Corp | Mis-operation detecting system for data |
JPS581245A (en) * | 1981-06-26 | 1983-01-06 | Fujitsu Ltd | Branch address producing method |
JPH0323938B2 (en) * | 1981-06-26 | 1991-04-02 | Fujitsu Ltd | |
JPS5829052A (en) * | 1981-08-12 | 1983-02-21 | Hitachi Ltd | Microcomputer device with malfunction preventing function |
JPS5837759A (en) * | 1981-08-28 | 1983-03-05 | Toshiba Corp | Electronic desk top calculator with melody |
WO1983003888A1 (en) * | 1982-05-04 | 1983-11-10 | Matsushita Electric Industrial Co., Ltd. | Cooking device |
US4686356A (en) * | 1982-05-04 | 1987-08-11 | Matsushita Electric Industrial Co., Ltd. | Heating appliance with internal non-volatile memory |
JPS6048545A (en) * | 1983-08-26 | 1985-03-16 | Nec Corp | Microcomputer |
JPS61118833A (en) * | 1984-11-14 | 1986-06-06 | Fujitsu Ltd | Audio response unit |
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