Hi, I am having a problem that voltage, applied to PB0 (reference input) is not stable for the integrated D/A converter. 1K ohm VR, which is biased by 3.3V creates the voltage and if I disconnect PB0 from VR, VR's voltage, of course becomes stable. I set PB0 pin as input just in case, but the same result. It sometimes becomes stable. There are not any components between VR and PB0 and both are very close. Does anyone know what is going on? I originally thought the internal circuit of PB0 was broken, so I changed the Xmega, but got the same problem. I also changed VR, but same problem I got ...
Joined: Sun. Apr 17, 2011
Posts: 30 View posts