Circuit and method for detecting a failure in a microcomputer

Details Circuit and method for detecting a failure in a microcomputer Circuit and method for detecting a failure in a microcomputer

1992-06-25

1995-04-18

Beausoliel, Jr., Robert W.

Excavating

371 161, 371 163, G06F 1100

Patent

active

054086450

ABSTRACT:
A circuit and method for detecting a failure in a microcomputer are disclosed in which a watch-dog timer monitors an internal state of the microcomputer at an internal node representing the internal state and an error detection signal used to inform the failure of the microcomputer is output when a particular internal state to be generated on the internal node within a predetermined period of time. Particularly, in a preferred embodiment where the internal node is an output portion of a microprogram memory, microinstructions are monitored which serves as control signals used within or externally to the microcomputer.

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