pub type REFSEL_W<'a, const O: u8> = FieldWriter<'a, u32, REFSEL_SPEC, u8, REFSEL_A, 3, O>;
Field REFSEL writer - Reference select
REFSEL
struct REFSEL_W<'a, const O: u8> { /* private fields */ }
VREF = internal 1.2 V reference (VDD >= 1.7 V)
VREF = internal 1.8 V reference (VDD >= VREF + 0.2 V)
VREF = internal 2.4 V reference (VDD >= VREF + 0.2 V)
VREF = VDD
VREF = AREF (VDD >= VREF >= AREFMIN)