/* select LDO output voltage this bit set by software when the main PLL closed, before closing PLL, change the system clock to IRC16M or HXTAL  */
void pmu_ldo_output_select(uint32_t ldo_output)
/* select LDO output voltage this bit set by software when the main PLL closed, before closing PLL, change the system clock to IRC16M or HXTAL  */
void pmu_ldo_output_select(uint32_t ldo_output)
{
    PMU_CTL &= ~PMU_CTL_LDOVS;
    PMU_CTL |= ldo_output;
}