Microcomputer selecting operating condition

Details Microcomputer selecting operating condition Microcomputer selecting operating condition

2006-02-21

2009-08-25

Lee, Thomas (Department: 2115)

Electrical computers and digital processing systems: support

Computer power control

Power conservation

C713S322000, C361S103000, C327S141000

Reexamination Certificate

active

07581128

ABSTRACT:
A microcomputer includes a CPU, a program memory for storing a subroutine program, peripheral circuits, a clock circuit, and a voltage drop detection circuit. When the voltage drop detection circuit detects the voltage drop at the end of a power line, a frequency of a clock signal provided through the clock circuit to the CPU is divided down and a supply of a clock signal provided to the peripheral circuits is stopped. The CPU executes the subroutine program, thereby resuming the supply of the clock signal provided to the peripheral circuits.

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