How to use internal oscilator of PIC16F628A?

[orjon1]

I used something like this :

@ DEVICE pic16F628A, INTRC_OSC, WDT_OFF, PWRT_OFF, BOD_OFF, MCLR_ON, LVP_OFF

DEFINE  OSC 4

I'm stuck on a very similar (i think!) problem;

Using a PIC16F777 for the first time, which has an internal Osc. I'd like to get it running at 4MHz, but using fratello's DEFINE code modified to:

 @ DEVICE pic16F777, INTRC_OSC

DEFINE  OSC 4

....as does not work. the 4MHz, seems much more like 4Hz.

Any help?! thanx!

[mister_e]

Open the datasheet under OSCCON register, and see the default setting., from there change it.

[orjon1]

Thank you Steve - got it working... but i do not understand all the bits in that register;

IOFS: INTOSC Frequency Stable bit ?
SCS<1:0>: Oscillator Mode Select bits ?