LVDS Tunneling Protocol and Interface IP User Guide: Agilex™ 5 FPGAs and SoCs

Download PDF
ID 844310
Date 2/24/2025
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of Contents
Document Table of Contents x
1. Overview 2. Configuring and Generating the IP 3. Simulating the IP 4. Validating the IP 5. Troubleshooting and Debugging Issues 6. Appendix A: Functional Description 7. Appendix B: Registers 8. Document Revision History for the LVDS Tunneling Protocol and Interface IP User Guide
1. Overview x
1.1. About the LVDS Tunneling Protocol and Interface IP 1.2. About the Document 1.3. Applicable Applications 1.4. Key Concepts 1.5. IP Design Flow 1.6. Design Considerations/Guidelines
1.1. About the LVDS Tunneling Protocol and Interface IP x
1.1.1. IP Release Information 1.1.2. IP Features 1.1.3. IP High-level Block Diagram 1.1.4. Licensing the IP 1.1.5. Device Family Support 1.1.6. Device Speed Grade Support 1.1.7. IP Performance and Resource Utilization
1.2. About the Document x
1.2.1. Target Audience 1.2.2. Conventions Used in the Document 1.2.3. Acronyms 1.2.4. Reference Documents and Training
1.4. Key Concepts x
1.4.1. Interface Tunneling Principle 1.4.2. LTPI Tunneling Methodology 1.4.3. Clock Topology 1.4.4. LTPI Frame 1.4.5. System-level Block Diagram 1.4.6. Link Management 1.4.7. Signal Description
1.4.4. LTPI Frame x
1.4.4.1. Link Detect and Link Speed Selection Frames 1.4.4.2. Link Detect Frame 1.4.4.3. Link Speed Frame 1.4.4.4. Advertise, Configure, and Accept Frames 1.4.4.5. Advertise Frames 1.4.4.6. Configure Frame 1.4.4.7. Accept Frame 1.4.4.8. LTPI Operational Frames 1.4.4.9. Default I/O Frame 1.4.4.10. Default Data Frame
1.4.6. Link Management x
1.4.6.1. Link Training 1.4.6.2. Link Configuration 1.4.6.3. Operational Mode
1.4.7. Signal Description x
1.4.7.1. Clock and Power Signals 1.4.7.2. Channel Signals 1.4.7.3. Avalon® Memory-Mapped Primary Interface Signals 1.4.7.4. Avalon® Memory-Mapped Secondary Interface Signals 1.4.7.5. Avalon® Memory-Mapped CSR Interface Signals 1.4.7.6. Miscellaneous Interface Signals
2. Configuring and Generating the IP x
2.1. Configuring the Quartus® Prime Pro Edition Project 2.2. Configuring the LVDS Tunneling Protocol and Interface IP 2.3. Generating HDL for Synthesis and Simulation 2.4. Generating the Simulation Design Example 2.5. Compiling the Design Example in Hardware
2.2. Configuring the LVDS Tunneling Protocol and Interface IP x
2.2.1. Configuring the LVDS Tunneling Protocol and Interface IP Parameters
2.3. Generating HDL for Synthesis and Simulation x
2.3.1. Generated File Structure
2.4. Generating the Simulation Design Example x
2.4.1. Generated Directory Structure and Files
3. Simulating the IP x
3.1. Design Example Features 3.2. Design Example Components 3.3. Configuring the Design Example Parameters 3.4. Simulating the Design Example
3.4. Simulating the Design Example x
3.4.1. Simulation Testbench Flow 3.4.2. Simulation Output
6. Appendix A: Functional Description x
6.1. GPIO Channel 6.2. I2C Channel 6.3. UART Channel 6.4. Data Channel 6.5. OEM Channel
1. Overview
2. Configuring and Generating the IP
3. Simulating the IP
4. Validating the IP
5. Troubleshooting and Debugging Issues
6. Appendix A: Functional Description
7. Appendix B: Registers
8. Document Revision History for the LVDS Tunneling Protocol and Interface IP User Guide

1.4.7.6. Miscellaneous Interface Signals

Table 37.  Miscellaneous Signals
Signal Name Direction Size Description
req_tag_in Input 1 The miscellaneous input pins of the data channel are assigned to the "Tag" field within a data frame.
req_tag_out Output 1 The miscellaneous output pins of the data channel are used to repopulate the "Tag" value received from the remote IP to this port.
link_config_timeout_err Output 1 Output of the link configure/accept timeout error register
link_speed_timeout_err Output 1 Output of the link speed timeout error register
unknown_comma_err Output 1 Output of the unknown comma error register
crc_err Output 1 Output of the frame CRC error register
link_lost_err Output 1 Output of the LTPI link lost error register
crc_err_cmd Output 1 Output of the received CRC error command in the data channel register
cpl_to_err Output 1 Output of the completion timeout error register
link_aligned Output 1 Output of the LTPI link aligned register. Indicates that the LTPI frames are decoded correctly.
local_link_state Output 1 Local LTPI link state
nl_gpio_stable Output 1 Normal latency GPIO Stable indication. It is in a high state only for one clock cycle, when all normal latency GPIOs were received.
Level Two Title