pub type RtcsrcW<'a, REG> = FieldWriterSafe<'a, REG, 2, Rtcsrc>;
Field RTCSRC writer - RTC clock entry selection
RTCSRC
struct RtcsrcW<'a, REG> { /* private fields */ }
No clock
LXTAL oscillator clock used as RTC clock
IRC40K oscillator clock used as RTC clock
HXTAL oscillator / 32 used as RTC clock