I might have overlooked something obvious but can someone tell me the math behind the HEX to MHz conversion, for example what is the equation that gets 211 equal to 850Mhz?
*approximate equation
take the first 2 digits the '21'
convert hex to decimal to get 33
multiply 33 x 25MHz and ya get 825MHZ
(add 25MHz to your answer)
The last digit is the divisor, it's 1 so we are done.
YMMV

Thanks for the details, that helps some but the use of a 5 on the end confuses it some.. I'm wrapping up a custom firmware that opens the frequency settings however I need to set the registers manually as KNC is disallowing it in their binary tool. I have it all working just trying to get a stragithforward, yet reliable equation to flip the MHz to the proper hex but it's not looking good yet.