Agilex® 7 FPGA F-Series Transceiver-SoC Development Kit User Guide

ID 683752
Date 11/07/2025
Public
Document Table of Contents

A.1. System Management

Two MAX® 10 FPGAs (10M16SCU324C8G) are used for system management. The system MAX® 10 acts as system controller. It handles FPGA AvST configuration, I2C bus access, fan speed control, and system reset functions. The UB2/PWR MAX® 10 acts as power manager and onboard JTAG controller. Refer to below description for each function:
  • Power management: Controls systems and FPGA power up and optional down sequence, supervises power regulators/switches status and manages power faults, supervises temperature ADC interrupt signals, and manages temperature faults.
  • JTAG controller: Manages JTAG chain topology, JTAG master source and JTAG slaves by SW3.
Table 7.  JTAG Master Sources
Schematic Signal Name Description
EXT_JTAG_TCK/TDO/TMS/TDI JTAG header J19 for Intel® download cable
FX2_Dp/n Input port CN1 for onboard Intel® download circuit
HPS_GPIO[32:35] Mictor 38 pin header on OOBE daughter card

The Agilex™ 7 HPS JTAG slave can be accessed from either SDM dedicated JTAG pins or HPS dedicated I/Os. When it is accessed from SDM JTAG pins (FPGA_JTAG_TCK/TDO/TMS/TDI), SDM is chained with HPS inside FPGA part. When it is accessed from HPS dedicated I/Os (HPS_GPIO[32:35]), HPS is chained externally by PCB traces.

Table 8.  JTAG Chain Topology Settings
Mode SW3 [8:6] SW3[5][2][1]

ON: Bypass from chain

OFF: Enable in chain

Function
000

ON/ON/ON

(Default)

SW3.1 (SDM+HPS)

SW3.2 (SysMAX)

SW3.5 ( PCIe* )

Mode 1: Onboard Intel® download circuit act as the only JTAG Master

Chained HPS with SDM nodes internally

Mode 3: External Intel® download cable act as the only JTAG Master

Chained HPS with SDM nodes internally

001 ON/ON/OFF

SDM is always enabled in the JTAG chain

SW3.1 (HPS)

SW3.2 (SysMAX)

SW3.5 ( PCIe* )

Mode 2: Onboard Intel® download circuit act as the only JTAG Master

Chained HPS with SDM nodes externally

Mode 4: External Intel® download cable act as the only JTAG Master

Chained HPS with SDM node externally

100 OFF/ON/ON

SW3.1 (SDM)

SW3.2 (SysMAX)

SW3.5 ( PCIe* )

Mode 7: Both onboard Intel® download circuit and OOBE act as JTAG Masters

Separated HPS and SDM JTAG chains, OOBE only drive HPS

Mode 8: Both external Intel® download cable and OOBE JTAG act as JTAG Masters

Separated HPS and SDM JTAG chains, OOBE only drive HPS

110 OFF/OFF/ON

Mode 11: Both onboard Intel® download circuit and OOBE act as JTAG Masters

Onboard Intel® download circuit only drive SDM, OOBE only drive HPS

Others Reserved
Note: UB2/PWR MAX® 10 has dedicated JTAG header J18 onboard bottom side. When you plug in the Intel® FPGA Download Cable dongle cable into J18, power MAX® 10 enters debug mode 0 or 1 by detecting the PWRMAX_DEBUGMDn signals. You should not overwrite UB2/ MAX® 10 image through J18, otherwise the board cannot function properly.