The period is divided up into 32 pieces, instead of a 256 bit width, if that makes sense. So, the frequency is 20mHz/32 = 625kHz. 0b100000 / 0x20.

Yeah, and with the load I’ll run, it’s not real critical. I just figure there has to be a name for this sort of tuning. If I know what it’s called, I can read up on it.