Sleep clock (power management)

Dec 17, 2008 1 Replies

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ksashtekar 17 years ago

Hello Group,

While reading some requirement specification I came across a term called "sleep clock". I know it it related to a power saving mechanism. I but I am not sure how it works exactly. Is it some kind of gating mechanism where the processor controlling the system power distribution, gives out a signal to suggest to other peripherals on the PCB to go in power down mode?

-Kaustubh

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Rich Webb 17 years ago

In most cases with which I am familiar, a "sleep clock" is a clock source that is much slower than the main system clock and that can be used, in company with a timer or RTC peripheral, to periodically bring the CPU out of a low power mode. It is often a 32.768 KHz watch crystal.

Rich Webb Norfolk, VA

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