The XIAO Wiki “Specifications” says only: “…running at up to 48MHz”. But, what is the actual oscillator frequency? And what is the minimum number of clock cycles per instruction – like, for instance, a NOP?
Hi @Steve_Lawson,
XIAO uses the internal RC oscillator of the chip and the base frequency is 8MHz. It goes through a series of frequency divisions until 48MHz to work for SAMD21.
The NOP is 1/48MHz, which is about 0.02us.
Please check here for further details on the subject:
Best Regards,
Lakshantha
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