Electrical computers and digital processing systems: support – Clock – pulse – or timing signal generation or analysis – Counting – scheduling – or event timing
Reexamination Certificate
2007-04-24
2007-04-24
Perveen, Rehana (Department: 2116)
Electrical computers and digital processing systems: support
Clock, pulse, or timing signal generation or analysis
Counting, scheduling, or event timing
C713S500000
Reexamination Certificate
active
10283333
ABSTRACT:
In an in-vehicle electronic control apparatus (ECU), when a microcomputer stops operation, a timer IC starts the count-up operation. When the count value reaches a preset value, a signal from the timer IC becomes high and a power supply voltage is outputted from a power supply IC to activate the microcomputer. The microcomputer reads the count value from the timer IC when it starts the operation. If such a count value has exceeded the specified value, the microcomputer determines occurrence of a failure. Therefore, if the timer IC cannot activate the power supply IC, the microcomputer can detect a failure upon activation with turning on of an ignition switch.
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Japanese Search/Examination Report—Nov. 21, 2005.
Chen Tse
DENSO Corporation
Nixon & Vanderhye P.C.
Perveen Rehana
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