AVR-Chat

Hi all,

What is the purpose of the prescalers on the system clock?

Ray

At 09:30 AM 29/08/2008, you wrote:
>What is the purpose of the prescalers on the system clock?

Mainly to slow down the processor and save battery power.


Regards

John Samperi

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divide the clock frequency fclk/prescaller

--- On Fri, 8/29/08, reddurango1 <ki4vdj@gmail.com> wrote:

From: reddurango1 <ki4vdj@gmail.com>
Subject: [AVR-Chat] prescaler
To: AVR-Chat@yahoogroups.com
Date: Friday, August 29, 2008, 2:30 AM






Hi all,

What is the purpose of the prescalers on the system clock?

Ray

 














      

[Non-text portions of this message have been removed]

On Fri, Aug 29, 2008 at 1:47 AM, John Samperi
<samperi@ampertronics.com.au> wrote:
> At 09:30 AM 29/08/2008, you wrote:
>>What is the purpose of the prescalers on the system clock?
>
> Mainly to slow down the processor and save battery power.
>

I've used it to put the system into deep sleep, after shutting down
everything else I didn't absolutely need.
One thing to watch, if you make large changes in the clock speed,
you'll need a minimum of eight NOPs after the clock change since
that's the only instruction that is guaranteed to execute properly
after a big clock change.