An interface unit for connecting a transmitting unit to a receiving unit, the transmitting being capable of transmitting data at a speed greater than the processing speed of the receiving unit. The interface includes a serially connected multistage register which receives input data from the transmitting...http://www.google.ca/patents/US4649512?utm_source=gb-gplus-sharePatent US4649512 - Interface circuit having a shift register inserted between a data transmission unit and a data reception unit
