Microcomputer with two oscillators of different frequencies selectable by a reset signal set by an instruction or by an overflow signal of a counter
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United States of America Patent
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May 25, 1999
Issued Date -
N/A
app pub date -
Nov 14, 1997
filing date -
Jun 30, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A microcomputer incorporating two oscillation circuits for generating clocks having different frequencies, which can be driven even when an oscillator is connected only to one of the oscillation circuits, by counting the number of clock pulses of the first or the second oscillation circuit, and selecting the clock of the first or the second oscillation circuit according to the data latched in a latch circuit that is set by an overflow signal outputted when the count value overflows.
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