Gate Array Technology (IBM - 1970s)

• Simple logic gates

  • usetransistors toimplement combinationaland sequential logic

• Interconnect

  • wires to connect inputs andoutputs to logic blocks

• I/O blocks

  • special blocks at peripheryfor external connections

• Add wires to make connections

  • done when chip is fabbed
    • “mask-programmable”
  • construct any circuit

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