摘要:
A circuit arrangement for use in an integrated circuit having a built-in self test design, the circuit arrangement comprising first and second gates (8, 3) coupled to a flip-flop (2) via a third gate (4). The present invention provides a multiplexer (M) coupled to one input of the first gate (8), the multiplexer (M) being controllable by a control signal to feed either input data or output data of the circuit arrangement to said one input of the first gate (8) and a fourth gate (13) coupled to an input of the second gate (3), the fourth gate (13) having an input connected to receive a signal dependent on the control signal to the data selector means (M).