Hi everybody. I am now working on 18F2455 because of its USB feature. But I got some troubles with converting.I use 4MHz crystal/resonator. I apply a sinusoidal signal with the amplitude 2,5 or 5 volts and a frequency 2kHz from function generator to PORTA.0. And want an output from PORTA.1. But it behaves strange. The negative parts of this sinusoidal is cut off. It only receives the positive parts. I monitored this event on the scobe. And guess what I got as an output. It is 5V DC. It doesn't change. Today I will try it one more time. Does anyone have any suggestions?
What am I doing wrong?