Semiconductor device including an external oscillation circuit

Oscillators – With synchronizing – triggering or pulsing circuits – Triggering or pulsing

Reexamination Certificate

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Details

C331S158000

Reexamination Certificate

active

07135939

ABSTRACT:
A semiconductor device includes an external oscillation circuit connected to an external resonator, a self-exciting oscillation circuit, and an oscillation clock monitoring circuit, the oscillation clock monitoring circuit monitors an oscillation state of the external resonator using a clock signal generated by the self-exciting oscillation circuit, and when judged that the oscillation state has been stabilized, the terminating signal of the waiting time for stabilization of oscillation is outputted to terminate the waiting time for stabilization of oscillation of a microcomputer forcedly.

REFERENCES:
patent: 5196810 (1993-03-01), Graether et al.
patent: 2002/0097099 (2002-07-01), Miyamoto
patent: 06-138975 (1994-05-01), None
patent: 09-093040 (1997-04-01), None

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