Divider fraction configuration register for low-power clock
LPCLK_SEL_RTC_SLOW | Set this bit to select RTC slow clock as the low power clock. |
LPCLK_SEL_8M | Set this bit to select 8m clock as the low power clock. |
LPCLK_SEL_XTAL | Set this bit to select xtal clock as the low power clock. |
LPCLK_SEL_XTAL32K | Set this bit to select xtal32k clock as the low power clock. |
LPCLK_RTC_EN | Set this bit to enable the RTC low power clock. |