I am trying to program a MC8SO8 GT8A. I am using an internal oscillator in FEI mode. I want to set up serial com but need to have the bus frequency accuracy up to about 2% instead of the 25%. I feel that the ICTRIM has something to do with this from reading the manual. The data sheet says it adjusts the period with a larger value. The question is how I know what accuracy that I am getting with what value. I can’t seem to figuire this one out.