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Xt Osc On 16f777

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This code seems to work with OR without the XT on pins 13 and 14. This makes me think that the int osc is activated.

Any clue how I can disable the int osc and use only the external XT?

BTW: I AM programming the config along with the code.

Thanks for you help




#include <system.h>



void Startup(void) {

osccon = 0b01101110; //Set oscillator to 4MHz

adcon1 = 1111b; //Set all pins to digital


trisa = 0b00000000; //Set porta for output

trisb = 0b00000000; //Set portb for output

porta = 0;

portb = 0;

portc = 0;

portd = 0;





void main(void) {

while( 1 ) {

delay_s(1); porta = 1;

delay_s(1); porta = 0;



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