I mean on the ATMEGA128. I was reading the refference doc for the microchip and read that i had to set multipliers that are related to the clock to run the clock speed down to between 50-200 khtz. (This is all in relation to using the analog input on the robostix). Anyways, if you could give me a quick rundown of how to figure out the speed of the item called "clkADC" I would be very happy :)

On 6/13/06, Dave Hylands <dhylands@gmail.com> wrote:
Hi Mark,

> I am trying to figure out how to use the ADC and I can't quite grasp the
> nature of the ADC devoted clock, and what i really can't figure out is what
> speed it is running at so that i can scale it to the correct frequency of
> the ADC.

Are you referring to the ADC on the UCB1400? or the Robostix? or something else?

ADCs that use a clock typically use a technique called successive approximation.

You can find out more about how analog to digital converters work over here:

Dave Hylands
Vancouver, BC, Canada

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