pub type EtpscW<'a, REG> = FieldWriterSafe<'a, REG, 2, Etpsc>;
Field ETPSC writer - External trigger prescaler
ETPSC
struct EtpscW<'a, REG> { /* private fields */ }
External trigger prescaler disabled
ETI frequency divided by 2
ETI frequency divided by 4
ETI frequency divided by 8