/* Configures the PLL clock source and DM DN factor. This function must be used only when the PLL is disabled.  */
void RCC_PLLDMDNConfig(u32 plldn, u32 plldm)
/* Configures the PLL clock source and DM DN factor. This function must be used only when the PLL is disabled.  */
void RCC_PLLDMDNConfig(u32 plldn, u32 plldm)
{
    MODIFY_REG(RCC->PLLCFGR, (RCC_PLLCFGR_PLL_DN | RCC_PLLCFGR_PLL_DP), ((plldn << RCC_PLLCFGR_PLL_DN_Pos) | (plldm << RCC_PLLCFGR_PLL_DP_Pos)));
}