I'm transitioning from Arduino IDE to studio 7 and trying to set the fuses for an Atmega324PB so that it will use a 20Mhz external crystal. I've spent the last 2 days trying to figure it out with no success.
The PCB works with the mightycore set at 20Mhz and I've now added a JTAG interface for better debugging which I also understand will prevent me 'bricking' the chip if I get the clock settings wrong.
For the life of me, I can't figure out how to set the chip clock speed within Studio 7 (tools/device programming/Fuses).
Can some kind soul give me some pointers? The data sheet for the 324PB is not helpful