PLL_DIV_N_MASK
den = (val >> PLL_DIV_N_SHIFT) & PLL_DIV_N_MASK;
val &= ~(PLL_DIV_N_MASK << PLL_DIV_N_SHIFT);
val |= (rtbl[i].n & PLL_DIV_N_MASK) << PLL_DIV_N_SHIFT;