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661 B

General Notes


  • logical wrappers instantiate hard array
  • SDR: use multiple hard array instances to add ports
  • DDR: use early/late pulses to double read/write ports

DDR Implementation

  • strobes are generated from clk based on configurable delay parameters

Test site arrays

  • 2R1W, SDR - this is the sdr hard array and simple logical wrapper using single clock
  • 4R2W, DDR - this is the ddr hard array and double-rate logical wrapper generating early/late pulses

Configuration options

  • SDR clock frequency (external to logical array)

  • DDR clock frequency (external to logical array)

  • SDR Pulse Control

  • DDR Pulse Control