I'm using the Cygnal F320 in a project; is it possible to upgrade the program through the USB interface? It would be very handy to have a USB bootloader. Any ideas?
I also have trouble with port 3 P3.0 bit which happens to be the C2 data line too. I program it as a digital push-pull output and drives a piezo beeper through HC14 buffers (High input impedance); all at a sudden the output latches to high or low, the rest of the micro works fine; if I move the sounder to other pin everything is OK. Could be EMC? I cut the tracks to the pin and still happens with a CRO probe mounted only.
Cheers from Downunder,
Laszlo