pub type Exs0aW<'a, REG> = FieldWriterSafe<'a, REG, 2, Exs0a>;
Field EXS0A writer - Event Source Select for A0 (ERS0)
EXS0A
struct Exs0aW<'a, REG> { /* private fields */ }
Input ERU_0A0 is selected
Input ERU_0A1 is selected
Input ERU_0A2 is selected
Input ERU_0A3 is selected