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Sleep clock (power management)

Started by ksas...@gmail.com December 17, 2008
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
On Wed, 17 Dec 2008 05:10:43 -0800 (PST), "ksashtekar@gmail.com"
<ksashtekar@gmail.com> wrote:

>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?
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