Clock signal generation and test circuitry

Details Clock signal generation and test circuitry Clock signal generation and test circuitry

1996-10-23

1998-05-19

Mis, David

Oscillators

Plural oscillators

Selectively connected to common output or oscillator...

331 44, 331 57, 331173, H03B 500, H03B 520, H03B 2800

Patent

active

057540810

ABSTRACT:
The present invention provides a semiconductor device wherein the oscillation of a clock signal oscillation circuit is halted by control carried out by a CPU when a clock-signal switching circuit selects either a clock signal generated by a CR oscillation circuit or a clock signal generated by an oscillator-driven oscillation circuit. A frequency divider divides the frequency of a clock signal generated by the clock signal oscillation circuit, supplying a clock signal with a divided frequency to the clock-signal switching circuit.

REFERENCES:
patent: 5623234 (1997-04-01), Shaik et al.

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