pub type ADCPRE_W<'a, const O: u8> = FieldWriterSafe<'a, u32, CFGR_SPEC, u8, ADCPRE_A, 2, O>;
Field ADCPRE writer - ADC prescaler
ADCPRE
PCLK divided by 2
PCLK divided by 4
PCLK divided by 6
PCLK divided by 8