I just bought a batch of 20 new Atmega328-PU processors and wanted to load de Arduino-bootloader on there as I have done a few times before. Just like the other times that I did it (but a while ago..) I assembled the new processor on a breadboard in the 'minimal' setup, so using the internal 8Mhz oscillator.
As the atmega328-PU has a different signature than the atmega328, I did this using an old arduino IDE (version 0019), as I still had the right signature configuration there from last time I did this.
All seemed to be well, and after I was done I could succesfully upload sketches written in Arduino.
However, there is a problem when I run the sketches. The timing was completely off and the microprocessor was not executing correctly. When I looked with my oscilloscope on the XTAL1 and 2 (pin 9 and 10), I can see a clock, but it runs around the 0V, whereas when I do the same measurement on a working processor, the clock runs at about 600mV.
I think I must have done something wrong when I uploaded the bootloader, but I'm not sure what.
If somebody could share their thoughts, that would be very much appreciated. I hope I can restore the processors to a working configuration, but I might just as well have fried something.
I was looking into the fuse bits topics earlier, but I'm not sure if that's the right place to start.