Power control apparatus, electronic apparatus, and portable communications terminal
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United States of America Patent
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Oct 7, 2008
Grant Date -
Oct 27, 2005
app pub date -
Apr 18, 2005
filing date -
Apr 21, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A voltage detector detects a start of power supply from a battery. When the voltage detector detects the start of power supply, a counter starts counting the clocks of an RTC. A first comparator compares a count value stored in a first non-volatile memory and the count value of the counter and outputs a CPU reset release signal when these count values match with each other. A second comparator compares a count value N stored in a second non-volatile memory and the count value of the counter and, when these count values coincide with each other, performs power-on operation of a regulator which outputs I/O power for the CPU. Accordingly, timing of CPU reset release and timing of regulator power-on can be readily modified without aluminum modification.
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