Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 4/01/2024
Public

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A.4.1.2. HPS Events

If any type of HPS reset event occurs, for example, watchdog, cold, or warm reset events, the h2f_gp_out[31:0] signals are driven with the reset value of the h2f_gp_out[31:0] register, which is low, until it is changed by software to a specified value during HPS boot up.

This software assertion high and hardware clearing low provides a practical mechanism for FPGA logic to understand the state of the HPS signals that enter the FPGA.