Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 7/07/2025
Public
Document Table of Contents

8.1. Reset Manager Differences Among Altera® SoC Device Families

The following table shows the differences of the HPS reset manager between various device families.

Table 336.  HPS Reset Manager Differences
Reset Manager Feature

Cyclone® V SoC,

Arria® V SoC

Arria® 10 SoC

Stratix® 10 SoC,

Agilex™ 7

F-Series/I-Series/

M-Series SoC

Agilex™ 5

E-Series/D-Series SoC,

Agilex™ 3

C-Series SoC

Cold reset Sources
  • POR monitor45
  • nPOR pin
  • FPGA fabric
  • FPGA CB 46 and scan manager
  • Software cold reset request
  • Security manager
  • nPOR pin
  • FPGA fabric
  • FPGA CB
  • Software cold reset request
  • SDM
  • HPS cold reset pin 47
  • HPS mailbox request to SDM
  • System watchdogs
  • SDM
  • HPS cold reset pin47
  • HPS or FPGA mailbox request to SDM
  • System watchdogs
Warm reset sources
  • nRST pin
  • FPGA fabric
  • Software warm reset request
  • MPU watchdogs
  • System watchdogs
  • nRST pin
  • FPGA fabric
  • Software warm reset request
  • MPU watchdogs
  • System watchdogs
  • SDM
  • FSBL 48 or software warm reset request
  • System watchdogs
  • (not supported) nRST pin
  • (not supported) FPGA mailbox message to SDM
  • SDM
  • FSBL48 or software warm reset request
  • System watchdogs
  • (not supported) nRST pin
  • (not supported) FPGA mailbox message to SDM
MPU/CPU cold reset ---- ---- COLDMODRST register CPUINRESET register
MPU/CPU warm reset ---- ----
  • MPUMODRST register
  • Software request via RMR_EL3[RR] register
Software request via RMR_EL3[RR] register
Debug reset resources
  • DAP 49 request
  • FPGA fabric
  • DAP request
  • FPGA fabric
  • DAP reset
  • DAP reset
RAM-clearing reset No Yes Handled by SDM Handled by SDM
Anti-tamper reset No Yes Handled by SDM Handled by SDM
45 Power-on reset
46 Control block
47 One of the dedicated SDM I/Os can be configured to work as an HPS cold reset pin
48 First-stage boot loader
49 Debug access port