Hi there,
The Seeed Studio XIAO SAMD21 can handle incoming external interrupt signals at a maximum frequency of 48 MHz:
They do even faster , externally clocked.
HTH
GL 
PJ 
2 Likes
Hi there,
The Seeed Studio XIAO SAMD21 can handle incoming external interrupt signals at a maximum frequency of 48 MHz:
They do even faster , externally clocked.
HTH
GL PJ