Xilinx Programmable Gate Arrays

• CLB - Configurable Logic Block

  • 5-input, 1 output function
  • or 2 4-input, 1 output functions
  • optional register on outputs

• Built-in fast carry logic

• Can be used as memory

• Three types of routing

  • direct
  • general-purpose
  • long lines of various lengths

• RAM-programmable

  • can be reconfigured

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