pub type PPRE2_W<'a, const O: u8> = FieldWriter<'a, u32, CFGR_SPEC, u8, PPRE2_A, 3, O>;
Field PPRE2 writer - PCLK2 high-speed prescaler (APB2)
PPRE2
HCLK not divided
HCLK divided by 2
HCLK divided by 4
HCLK divided by 8
HCLK divided by 16