PURPOSE: To prevent the malfunction in information write-in, by the constitution that the information can be written only when an information write-in permission signal is present.
CONSTITUTION: A control system for car mount computer 1 mainly consists of a microcomputer 2, abnormal information storage 4, and alarm signal generator 6, and it is operated through the reception of the power supply from regulated DC power supplies 3, 5, receives an input signal from sensors 8 and outputs a control signal to actuator 9, etc. When a power supply switch 11 is closed and power supply is given from a battery 10, a program is started and the system is initialized. Information is written in an abnormal information storage 4 with the microcomputer 2, but a flag in provided and the failed information can be written in only wnen the flag is set for the write-in.
| JPH0652064 | DATA REWRITE SYSTEM AND ITS CIRCUIT IN MEMORY CIRCUIT |
| JP2003288215 | INFORMATION PROCESSING APPARATUS |
ITOU KATSUNORI
NAKANO MAKOTO
TAKANABE KAZUNORI
MUROZAKI TAKASHI
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