I was using 4.7uF caps, but added some 0.01uF caps to go with it. I looked at the noise on the 5v line, and every 1/125,000 sec, there's a +/- 0.2v oscillation with period 10nS that damps to nothing in 30nS. I'm pretty sure that's from 6 isolated supplies I have on a 24v line. The 24v line is feeding the input of a 7805 replacement part, and I think making it through. When I added a 0.01uF cap at a test point of +5v and gnd, the above sine waves went down to +/- 0.1v. That didn't help the debugger, but I feel better about it now.
It works fine in release mode. I'll try a lower frequency too. AVcc also has a 4.7uF cap and is connected to +5v and ground. I'll also read up on RCON. Thank you for the suggestions!
It works fine in release mode. I'll try a lower frequency too. AVcc also has a 4.7uF cap and is connected to +5v and ground. I'll also read up on RCON. Thank you for the suggestions!