I would like to program the SPI (LE, Data and CLK) for the HMC765LPCE by using FPGA. I would like to achieve the output frequency of the PLL at 7912.5 MHz, is it correct to let R=1, Nint=158, and the Nfrac=2^22? How does HMC765 identify if I would like to program register 03H? This is not explained either in the datasheet or the operating guide. For ADF4108, it can identify which register to write given the control bits of C2,C1. Can you elaborate more on this for HMC765?