pub type Exs2aW<'a, REG> = FieldWriterSafe<'a, REG, 2, Exs2a>;
Field EXS2A writer - Event Source Select for A2 (ERS2)
EXS2A
struct Exs2aW<'a, REG> { /* private fields */ }
Input ERU_2A0 is selected
Input ERU_2A1 is selected
Input ERU_2A2 is selected
Input ERU_2A3 is selected