A scan flip-flop (SFF) is a muxed input master-slave based D flip-flop.

Overview

A scan flip-flop is a D flip-flop with a multiplexer added at the input with one input of the MUX acting as the functional input D, with the other input serving as the Scan-In (SI) input. Scan Enable (SE) is used to control the MUX selection bit.

See also

• Boundary scan
• Scan chain
• JTAG