On Tue, 18 Jun 2002 18:31:03 -0400, Sivaram M Cheekiralla wrote:

>Hi,
>   Can anyone tell me how to use the internal oscillator in the
>PIC(16F84A). I am new to the PIC programming, so please don't mind if my
>question is too trivial.

Some PICs have an internal oscilator but the 16F84 and 16F84A don't.=20

Are you perhaps thinking of the RC oscillator option? If so, you need
to do two things to use it.

1. Your configuration word needs to contain the term "RC_OSC" and none
of the other oscillator terms (no LP_OSC, XT_OSC or HS_OSC).

2. The hardware consists of a resistor to Vdd and a capacitor to
ground. The junction of the resistor and the capacitor is connected to
pin OSC1.=20

The values of the resistor and the capacitor determine the frequency.
Microchip recommends a resistor in the range of 5k to 100k and a cap
greater than 20pF.=20

When using the RC oscillator, operating frequency/4 is output on pin
OSC2.


Regards, Bob

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.