Electrical computers and digital processing systems: support – Computer power control – Having power source monitoring
Reexamination Certificate
2005-04-18
2008-10-07
Cao, Chun (Department: 2115)
Electrical computers and digital processing systems: support
Computer power control
Having power source monitoring
C716S030000
Reexamination Certificate
active
07434077
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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Saito Masatoshi
Tsuchiyama Tomonori
Cao Chun
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Sony Corporation
Sony Ericsson Mobile Communications Japan Inc.
Tran Vincent T
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