Protective apparatus of vehicle microcomputer

Details Protective apparatus of vehicle microcomputer Protective apparatus of vehicle microcomputer

1988-08-30

1990-08-21

MacDonald, Allen

Boots, shoes, and leggings

F02D 1100

Patent

active

049512102

ABSTRACT:
Protective apparatus, for a vehicle microcomputer, that constrains the microcomputer output during periods of abnormal microcomputer operation. The protective apparatus includes a regulator connected to receive a microcomputer oscillating signal having a predetermined period during normal operation, the regulator inverting a reset signal provided thereby upon the oscillating signal period exceeding the predetermined period to indicate abnormal operation. The apparatus further includes a one-shot multivibrator (OMB) which inverts its output upon the regulator reset signal being inverted and an output inhibiting logic circuit which receives the microcomputer CPU output, the output inhibiting logic circuit interrupting the microcomputer CPU output when the OMB inverts its output.

REFERENCES:
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patent: 4370962 (1983-02-01), Hosaka
patent: 4386427 (1983-05-01), Hosaka
patent: 4410938 (1983-10-01), Higashiyama
patent: 4541050 (1985-09-01), Honda et al.
patent: 4577605 (1986-03-01), Arnold et al.
patent: 4580220 (1986-04-01), Braun et al.
patent: 4584645 (1986-04-01), Kosak
patent: 4587939 (1986-05-01), Hemminger et al.
patent: 4611271 (1986-09-01), Hattori et al.

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