Interface controller and method of operating a device including the same

A method of operating an interface controller to give one of a plurality of predetermined outputs, which comprises: receiving an input signal; comparing a duration of said input signal with a first and/or second threshold duration; and generating a first output if said input signal duration is shorter than said first threshold duration; or generating a second output if said input signal duration is longer than said first threshold duration but shorter than said second threshold duration; or generating a third output if said input signal duration is longer than said second threshold duration.