Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 7/19/2024
Public

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5.15.3. I/O Pin Multiplexing Features

The HPS I/O block provides the following functionality and features:

  • Dedicated HPS I/O pins
    • 48 pins available for HPS clock, external flash memories, and peripherals.
Note: The HPS also interfaces with an SDRAM memory controller. This interface is separate from the dedicated pins discussed in this chapter.
  • I/O multiplexing
    • Selects pins used by each HPS peripheral
    • Can expose HPS peripheral interfaces to FPGA logic
Note: When routed to the FPGA, some HPS peripherals require additional pipeline support in the connected soft logic. Refer to the relevant HPS peripheral chapter for details.

You configure I/O multiplexing when you instantiate the HPS component in Platform Designer. Refer to the Agilex™ 5 Component Reference Manual .