Semiconductor device including an external oscillation circuit

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...

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Bibliographische Detailangaben
Hauptverfasser:	KOIKE YOSHIHIKO, YOSHIDA SHUJI
Format:	Patent
Sprache:	eng
Schlagworte:	AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES BASIC ELECTRONIC CIRCUITRY CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY GENERATION OF NOISE BY SUCH CIRCUITS GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER PHYSICS PULSE TECHNIQUE
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Beschreibung
Zusammenfassung:	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.