Digital I/O Features

  • Dual 82C55A Parallel Peripheral Interfaces (PPI) logic implemented in FPGA cores.

  • Each 82C55A has three 8-bit I/O ports for a total of 48 DIO lines, which connect to a 50-pin header for external connections.

  • Port direction and operation is selected through software programmable control registers.

  • All lines are buffered with transceivers.

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