Are you saying that we should separately bypass/isolate these AVcc and AGND pins? Is there any Mchip reference for this or is it hard-earned experience talking? Bob Ammerman RAm Systems (contract development of high performance, high function, low-level software) ----- Original Message ----- From: Andrew Kunz To: Sent: Wednesday, August 23, 2000 7:34 AM Subject: Re: [PIC]: Why do 16F877's have 2 sets of VCC & Ground pins? > >How about to seperate the VCC to the A/D convertor section? This would reduce > >the vulnerability of the A/D to supply noise and ground bounce problems. > > Have you ever tried it? Run your big PIC with just one power or ground and see > the ADC results fall through the floor. > > The word I got was to treat the one near the ADC section as AVcc and AGND, > because that's essentially what they are. > > Andy > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics > > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics