TS2020_XTAL_FREQ
f_ref_khz = TS2020_XTAL_FREQ;
gdiv28 = (TS2020_XTAL_FREQ / 1000 * 1694 + 500) / 1000;
(TS2020_XTAL_FREQ / 1000) + 1) / 2;
lpf_mxdiv = (nlpf * (TS2020_XTAL_FREQ / 1000)
lpf_mxdiv = (nlpf * (TS2020_XTAL_FREQ / 1000)