Datasheet

output is the clock output #

The R divider can be any of the following:

SI5351_R_DIV_1

SI5351_R_DIV_2

SI5351_R_DIV_4

SI5351_R_DIV_8

SI5351_R_DIV_16

SI5351_R_DIV_32

SI5351_R_DIV_64

SI5351_R_DIV_128

Software

As you can see, the annoying part here is figuring out the best choice for PLL multipler & divider! SiLabs has a desktop

application called ClockBuilder (https://adafru.it/dPj) that can do some calculation of the PLL divider/multiplier for you.

It's windows only, but you only need to use it once for calculation.

Install and run, select the Si5351A with 3 outputs, and Do not connect to the EVB

Enable the output you want, and set the frequency as floating point or fraction

clockgen.setupRdiv(output, SI5351_R_DIV_x);