Prasad, Satyaprakash (Consultant) wrote:
> I am not quiet familiar with digital electronic or its intricacies,
> but hopes are definitely high.

What field DO you consult in?

> I am referring to PICmicro mid-range MCU family reference
> manual. I am trying to skill myself on PIC16F870.

The first reference for any PIC should be the data sheet.  There is very
little in the mid range reference manual that isn't in the data sheet.  In
fact, I personally don't find much use for the mid range manual.

> The manual does not explains explicitly about the difference
> in-between the
> different oscillator modes.

See "PIC16F87s Data Sheet" (DS30292C), section 12.2 "Oscillator
Configurations" on page 121.

> Now if the change the value
> of C1 and C2 such that the clock frequency increases
> (more than the clock
> range as specified for the device),
> how would PIC behave

Possibly not as specified in the data sheet.

> and WHY?

Because you are running it out of spec.  Microchip publishes details of how
the PIC will perform - but only if you operate it within certain parameters.
Once you go outside those parameters everything else in the data sheet
becomes null and void.


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