I have a USB oscilloscope project previously based around 72MHz PCI32MX274 which works great up to about 20MHz sampling rate.
So I decided to try an atsame70 300MHz processor on my next version.
1/ I cant get PWM to work for calibrate output.
2/ If I sset PCK0 faster than 12MHz it crashes the processor.
3/ The atsame max sampling rate is 20% slower than the PCI32.