Hello Benjamin,

There is no explicit equation to calculate the frequency for a RC oscilla=
tor
on a PIC.
There is to much unknown data inside the PIC that is not mentioned in the
data book.
You might look for a simple equation like f=3D1/(RC) or similar but that =
is a
simplified model and to have a correct model you need more data. Maybe th=
ere
is some one that have extrapolated a working equation but the easiest way=
 is
to test the R and C by hand.
In the data book for the PIC you use it is usually mentioned a table with
start values on R and C for different frequencies. Use a Resistor decade
ladder or similar to create your own list for other values not mentioned.
Note: RC-oscillator is for frequency insensitive applications and varies
with temperature, R and C tolerance and normal process parameter variatio=
ns
inside the PIC.

Regards
Niklas


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F=F6r Benjamin Menk=FCc
Skickat:        den 15 oktober 2001 22:20
Till:   PICLIST@MITVMA.MIT.EDU
=C4mne: [PIC]:

What is the formula for calculating f of a rc-osci ?

regards,

BEn

--------------------------
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Auto-Intern GmbH
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44359 Dortmund
Tel: 0231-1893070
Fax: 0231-93699548
www.auto-intern.com


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