pub type BR_W<'a> = FieldWriterSafe<'a, u32, CR1_SPEC, u8, BR_A, 3, 3>;
Field BR writer - Baud rate control
BR
f_PCLK / 2
f_PCLK / 4
f_PCLK / 8
f_PCLK / 16
f_PCLK / 32
f_PCLK / 64
f_PCLK / 128
f_PCLK / 256