Dimitris Kapousouz wrote :

> The min/max internall oscillator frequency is important to me
> because i don't want to use external clock (one more circuit).

OK.

> I have read that power consumption is proportional to the working
> frequency, and because myapplication (some kind of simple
> thermal management) doesnot need so much speed (4 MHz) i
> thought of decreasing the clock freq. That's why i wanted to
> know the internal osc. freq. limits

I see. And as you've seen now, using the OSCCAL and OSCTUNE
regs in *not* the way to save power !

> I know i can decrease power consumption with puting the PIC
> to Sleep mode (when i don't need it without decreasing the working
> freq.),  maybe it's the same thing, i just thought if the above thought
> was possible.

Yes, in a way, but the +- 12.5% will not save much power. :-)

> As far as PIC16F88, sorry i didnot finish reading the manual
> (my mistake),  but i did so for PIC12F675 and because i thought
> the internal osc options might be the same, i just asked!

"Thought"  and "might" ? It would have taken you 30 sec to find out
that they are not the same. The internal oscs in the 12F675 and the
16F88 are very different. I think that if you read about the intosc in
the 16F88 (again !?), you will find that it might very well have
what you need. (Hint: look for the IRCF bits in the OSCCON
register.)


Regards
Jan-Erik.

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