#DEVICE ADC=10 //10 bits resolution #USE delay(clock=16M) //16MHz clock   setup_vref( VREF_ON | VREF_ADC_2v048 ); setup_adc_ports( sAN3 , VSS_FVR ); setup_adc( ADC_CLOCK_DIV_16 ); set_adc_channel( 3 );