pub type TRIGMOD_W<'a, REG> = FieldWriter<'a, REG, 2, TRIGMOD_A>;
Field TRIGMOD writer - Select the trigger source for channel 0
TRIGMOD
struct TRIGMOD_W<'a, REG> { /* private fields */ }
internal Trigger (integer divided clock - see FREQ parameter)
external Trigger (preselected trigger by TRIGSEL parameter)
software Trigger (see SWTRIG parameter)