pub type EXS3A_W<'a, REG> = FieldWriter<'a, REG, 2, EXS3A_A, Safe>;
Field EXS3A writer - Event Source Select for A3 (ERS3)
EXS3A
struct EXS3A_W<'a, REG> { /* private fields */ }
Input ERU_3A0 is selected
Input ERU_3A1 is selected
Input ERU_3A2 is selected
Input ERU_3A3 is selected