A shift register including an electrical fuse and a method of operating
the shift register are disclosed. The shift register includes a register
flip-flop group circuit and a plurality of output circuits respectively
receiving a plurality of enable signals. Each output circuit includes a
fuse control flip-flop receiving one of the plurality of enable signals
and outputting a fuse control signal in response to the one enable
signal. Each output circuit also includes an electrical fuse receiving
the fuse control signal and outputting an electrical fuse mode signal,
and a multiplexer outputting either the register output signal or the
electrical fuse mode signal as a final output signal in accordance with
the one enable signal.