Fast Asynchronous Shift Register for Bit-Serial Communication

  • Authors:
  • Rostislav (Reuven) Dobkin;Ran Ginosar;Avinoam Kolodny

  • Affiliations:
  • Israel Institute of Technology, Haifa, Israel;Israel Institute of Technology, Haifa, Israel;Israel Institute of Technology, Haifa, Israel

  • Venue:
  • ASYNC '06 Proceedings of the 12th IEEE International Symposium on Asynchronous Circuits and Systems
  • Year:
  • 2006

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Abstract

A fast asynchronous shift register is used as the serializer and de-serializer in a novel bit-serial on-chip communication link. The link employs two-phase transition-based LEDR encoding. Acknowledgement is generated only at the word level, rather than bit by bit. The shift register is designed to achieve bit time of a single gate delay. It is based on a wave-pipelined control path and on transition latches. The circuit achieved 67 Gbps data rate when simulated on 65nm CMOS technology and was immune to in-die process variations of up to 10.