Data latch with structural hold

A system for propagating data in a datapath, comprising:

• a plurality of clocked data storage elements arranged in a datapath and operable to receive input functional data or scan data under control of a scan enable signal and to generate output data therefrom;
• a clock generator which receives a first clock signal and generates therefrom a non-overlapping second clock signal as a steady state signal during a functional mode and as a switching clock signal during a scan mode, where the switching clock signal during the scan mode has signal transitions in a first direction that are time shifted by a predetermined time interval from signal transitions in a second opposite direction at the first clock signal;
• and
• data propagation logic circuitry operable to use said first clock signal to cause functional data to propagate through said clocked data storage elements during a functional mode, and operable to use the first clock signal and the non-overlapping second clock signal to cause scan data to propagate through said clocked data storage elements during a scan mode to inhibit hold time violations from occurring at the clocked data storage elements.