pub type ECKSEL_W<'a, REG> = FieldWriter<'a, REG, 2, ECKSEL_A>;
Field ECKSEL writer - External Clock Selection Value
ECKSEL
struct ECKSEL_W<'a, REG> { /* private fields */ }
fSYS clock
fUSB clock divided according to ECKDIV bit field configuration
fPLL clock divided according to ECKDIV bit field configuration