ATSAMD09C13 TC Pin Toggle on match unequal

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Hi,

 

I set TC1 to toggle PA05 (W[1]). Normally a Impulse (1 or 0) take 125ns. In my case, every 50-90µs I get a wave with a Time over 1µs (see Picture).

All Interrupts are disabled. I post a short version from my code.

I can´t understand why this happens.

 

I hope you can help me, thanks!

 

Kind regards,

Umbrecht 

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