For you to think about...

• Registers slow the data path

  • To synchronize delays

• Hard: Use latches instead of registers

  • Permits faster circuits
  • Fast data slows down; slow data passes through transparent latch

• Harder: Self-timed datapath

  • Handshaking decides when data passes

• Hardest: Wave-pipelining

  • Delete the registers
    • Waves of data flow through circuit
    • Requires equal-delay circuit paths

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