Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 4/01/2024
Public

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8.3. Reset Manager Features

The reset manager generates module reset signals based on reset requests from the various sources in the HPS, and software writing to the module-reset control registers.

The HPS contains multiple reset domains. Each reset domain can be reset independently. A reset may be initiated externally, internally, or through software.

The reset manager performs the following functions:

  • Accepts reset requests from the SDM, and software.
  • Generates reset signals to modules in the HPS and to the FPGA fabric. The following actions generate reset signals:
    • Using software to write the MPUMODRST, PER0MODRST, PER1MODRST, BRGMODRST, COLDMODRST, or DBGMODRST module reset control registers.
    • Asserting the HPS_COLD_nRESET signal triggers the reset controller and h2f_cold_reset signal.
    • Sending mailbox message to the SDM to cause an HPS cold or HPS warm reset.
    • Watchdog timeout.
  • Provides reset handshaking signals to support system reset behavior.