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KE18 auto trim frequency

Question asked by David Sherman on Sep 8, 2017
Latest reply on Sep 27, 2017 by Robin_Shen

The KE18F512 manual mentions trimming the FIRC clock, and shows registers for enabling the auto trim from an external clock.  It shows the divider settings as well, but the one thing it doesn't mention is what the reference frequency is supposed to be.  What is the reference frequency?