An enhanced input-output element has a self-timed interface (STI) in which a clock signal clocks bit serial data onto a parallel, electrically conductive bus and the clock signal is transmitted on a separate line of the bus. The received data on each line of the bus is individually phase aligned with...http://www.google.se/patents/US5513377?utm_source=gb-gplus-sharePatent US5513377 - Input-output element has self timed interface using a received clock signal to individually phase aligned bits received from a parallel bus
