BIDIRECTIONAL SCAN CELLS FOR SINGLE-PATH REVERSIBLE SCAN CHAINS

摘要

A circuit comprises a plurality of scan chains. The plurality of scan chains comprisies bidirectional scan cells. Each of the bidirectional scan cells comprises two serial input-output ports serving as either a serial data input port or a serial data output port based on a control signal. Each of the plurality of scan chains is configured to perform a shift operation in either a first direction or a second direction based on the control signal. The first direction is opposite to the second direction.