PLL_2064_MHZ
qFcal = pi->xtalfreq * fcal_div / PLL_2064_MHZ;
d15 = (pi->xtalfreq * fcal_div * 4 / 5) / PLL_2064_MHZ - 1;
div_int = ((fvco3 * (PLL_2064_MHZ >> 4)) / fref3) << 4;
div_frac = ((fvco3 * (PLL_2064_MHZ >> 4)) % fref3) << 4;