I've made a attiny85 board that doesn't seem to work on external clock
The external clock is a crystal 7,328 Mhz + 2x capacitor 22pf
I have a led on on PB0 gpio and manage to get it blinking with a basic arduino blinking sketch
If I progam the fuse (lfuse:w:0xfd:m -U hfuse:w:0xdf:m -U efuse:w:0xff:m) to use the external oscillator it doesn't seem to work (no blinking)
I've checked on the osc pins (PB3 and PB4) with a scope and I haven't seen anything oscillating :-(
But I can still come back to the internal RC fuse and get the system working
Does a new fuses programming requires that the clock defined by the current fuses works ?
Which would means that my crystal + capacitor clock is working ?