Device Design Guidelines: Agilex™ 5 FPGAs and SoCs

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ID 813741
Date 3/14/2025
Public
Document Table of Contents
Document Table of Contents x
1. Introduction to Agilex™ 5 Device Design Guidelines 2. System Specification 3. Device Selection 4. Design Entry 5. Board and Software consideration 6. Design Implementation, Analysis, Optimization and Verification 7. Debugging
1. Introduction to Agilex™ 5 Device Design Guidelines x
1.1. Design Flow 1.2. Introduction to Agilex™ 5 Device Design Guide Revision History
2. System Specification x
2.1. Design Specification 2.2. Install Quartus® Prime Software 2.3. IP selection 2.4. Simulation 2.5. Preparing for Design Entry 2.6. I/O Summary 2.7. Using SDM in your devices 2.8. System Specification Revision History
2.3. IP selection x
2.3.1. IP cores 2.3.2. HPS IP
2.3.1. IP cores x
2.3.1.1. Interface Protocol IP cores
2.4. Simulation x
2.4.1. RTL Simulation 2.4.2. Simics® Simulator
2.5. Preparing for Design Entry x
2.5.1. Coding Styles and Design Recommendation 2.5.2. Platform Designer
3. Device Selection x
3.1. Device Variant 3.2. Device Selection Revision History
3.1. Device Variant x
3.1.1. Speed Grade and Package 3.1.2. Power option 3.1.3. Device Migration within Agilex™ 5 3.1.4. PLL 3.1.5. Logic element, Embedded memory, and DSP 3.1.6. I/O and LVDS SERDES 3.1.7. MIPI D-DPHY 3.1.8. Transceiver 3.1.9. Hard Processor System
4. Design Entry x
4.1. Design entry for FPGA 4.2. Design entry for Nios® V 4.3. Design entry for HPS 4.4. Design Entry Revision History
4.1. Design entry for FPGA x
4.1.1. Configuration Consideration 4.1.2. I/O and LVDS SERDES 4.1.3. PLL and Clock Planning 4.1.4. EMIF 4.1.5. Transceiver Planning 4.1.6. Sensors 4.1.7. MIPI D-PHY
4.1.1. Configuration Consideration x
4.1.1.1. Partial Reconfiguration 4.1.1.2. SEU
4.1.2. I/O and LVDS SERDES x
4.1.2.1. Making FPGA Pin Assignments Checklist 4.1.2.2. Early Pin Planning and I/O Assignment Analysis for the FPGA Device 4.1.2.3. Agilex™ 5 I/O Features and Pin Connections
4.1.2.3. Agilex™ 5 I/O Features and Pin Connections x
4.1.2.3.1. I/O Signaling Type 4.1.2.3.2. Selectable Standards and Flexible I/O Banks 4.1.2.3.3. Agilex™ 5 Dual-Purpose and Special Pin Connections 4.1.2.3.4. Agilex™ 5 I/O Features
4.1.3. PLL and Clock Planning x
4.1.3.1. Clock and PLL Selection 4.1.3.2. PLL Feature Guidelines 4.1.3.3. Clock Feedback Mode 4.1.3.4. Clock Outputs 4.1.3.5. Clock Control Features
4.1.6. Sensors x
4.1.6.1. Voltage sensor 4.1.6.2. Temperature Sensor and Temperature Diode
4.3. Design entry for HPS x
4.3.1. Simics® Simulator 4.3.2. HPS IP Instantiation in Quartus® Prime 4.3.3. Embedded Software
5. Board and Software consideration x
5.1. Early Board Planning 5.2. Boundary Scan for FPGA and HPS 5.3. Pin Connection Considerations for Board Design 5.4. Planning for Device Configuration 5.5. Board and Software Consideration Revision History
5.1. Early Board Planning x
5.1.1. Power - SmartVID or Fix Voltage 5.1.2. Thermal Management and Design
5.1.1. Power - SmartVID or Fix Voltage x
5.1.1.1. Power and Thermal Calculator 5.1.1.2. Power-Up and Power-Down Sequencing
5.3. Pin Connection Considerations for Board Design x
5.3.1. Board-Related Quartus® Prime Settings 5.3.2. Signal Integrity Considerations 5.3.3. Board-Level Simulation and Advanced I/O Timing Analysis
5.3.1. Board-Related Quartus® Prime Settings x
5.3.1.1. Unused Pins
5.3.2. Signal Integrity Considerations x
5.3.2.1. High-Speed Board Design 5.3.2.2. Simultaneous Switching Noise 5.3.2.3. I/O Termination
5.4. Planning for Device Configuration x
5.4.1. Device Power Cycling and Reconfiguration 5.4.2. Configuration Scheme Selection 5.4.3. Configuration Features 5.4.4. Quartus® Prime Configuration Settings 5.4.5. Configuration Pin Connections 5.4.6. JTAG Pins 5.4.7. MSEL Configuration Mode Pins 5.4.8. Other Configuration Pins
5.4.2. Configuration Scheme Selection x
5.4.2.1. Serial Configuration Devices 5.4.2.2. Intel® FPGA Download Cable II
5.4.4. Quartus® Prime Configuration Settings x
5.4.4.1. Optional Configuration Pins 5.4.4.2. Dual Purpose Configuration Pins
5.4.5. Configuration Pin Connections x
5.4.5.1. Configuration Pin Voltage Level 5.4.5.2. Clock Trace Signal Integrity
5.4.6. JTAG Pins x
5.4.6.1. JTAG Pin Connections 5.4.6.2. JTAG Signal Buffering 5.4.6.3. Download Cable Operating Voltage
6. Design Implementation, Analysis, Optimization and Verification x
6.1. Synthesis Tool 6.2. Device Resource Reports 6.3. Quartus® Prime Message 6.4. Design Assistant Design Rule Checking 6.5. Timing Constraints and Analysis 6.6. Area and Timing Optimization 6.7. Preserving Performance and Reducing Compilation Time 6.8. Designing with Hyperflex® 6.9. Simulation 6.10. Power Analysis 6.11. Design Implementation, Analysis, Optimization and Verification Revision History
6.5. Timing Constraints and Analysis x
6.5.1. Recommended Timing Optimization and Analysis Assignments 6.5.2. SDC-on-RTL and Post-Synthesis Static Timing Analysis
7. Debugging x
7.1. On-Chip Debug Overview 7.2. On-Chip Debugging Tools 7.3. Debugging Revision History
1. Introduction to Agilex™ 5 Device Design Guidelines
2. System Specification
3. Device Selection
4. Design Entry
5. Board and Software consideration
6. Design Implementation, Analysis, Optimization and Verification
7. Debugging

5.3.1.1. Unused Pins

Table 38.  Unused Pins Checklist

Number

Done?

Checklist item

1

 

Specify the reserved state for unused I/O pins.

2

 
Carefully check the pin connections in the Quartus® Prime software-generated .pin file.
Note: Do not connect RESERVED pins.
You can specify the state of unused pins in the Quartus® Prime software to allow flexibility in the board design by choosing one of the five allowable states for Reserve all unused pins on the Unused Pins category in the Device and Pin Options dialog box:
  • As inputs tri-stated
  • As output driving ground
  • As outputs driving an unspecified signal
  • As input tri-stated with bus-hold circuitry
  • As input tri-stated with weak pull-up
The following list describes some of the settings and their purpose:
  • The common setting is to set unused pins As inputs tri-stated with weak pull-up.
  • To improve signal integrity, set the unused pins to As output driving ground. Doing this reduces inductance by creating a shorter return path and reduces noise on the neighboring I/Os.
    Note: Do not use this approach if this results in many paths causing congestion for signals under the device.
  • To reduce power dissipation, set clock pins and other unused I/O pins As inputs tri-stated and tie them to GND.

Connection Guidelines for Unused HPS Block

If you are not using the HPS block in the Agilex™ 5 SoC device, you can follow the guidelines below for HPS specific pins:

Table 39.  HPS Supply Pins

Pin Function

If HPS is unused, connect to:

VCCL_HPS

VCCL_HPS_CORE0_CORE1 1

VCCL_HPS_CORE21

VCCL_HPS_CORE31

VCCIO_HPS

VCCPLL1_HPS

VCCPLL2_HPS

VCCPLLDIG1_HPS

VCCPLLDIG2_HPS

If you do not intend to utilize the HPS in the Agilex™ 5 SoC device, you must still provide power to the HPS power supplies.

For more information, refer to the Pin Connection Guidelines: Agilex™ 5 FPGAs and SoCs .

48 HPS Dedicated IO

No connect (NC)
Related Information
1 Can be tied to GND if unused.
Level Two Title