LVDS Tunneling Protocol and Interface (LTPI) IP User Guide: Agilex™ 3 and Agilex™ 5 FPGAs and SoCs
ID
844310
Date
8/15/2025
Public
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 (LTPI) IP User Guide: Agilex™ 3 and Agilex™ 5 FPGAs and SoCs
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
1.4.4.6. Configure Frame
The configure frame is used to select the desired capabilities based on the advertise frame. It is used by SCM to request specific configuration of the LTPI features based on the advertise definition during the configuration state.
The following table defines the LTPI configuration frame.
Frame Offset (bytes) |
Size (bits) |
Bit Field | Description | |||||||
---|---|---|---|---|---|---|---|---|---|---|
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |||
0 | 8 | Comma Symbol | Comma symbol as defined in the Frame Type and Frame Subtype table. | |||||||
1 | 8 | Frame Subtype | Frame subtype as defined in the Frame Type and Frame Subtype table. | |||||||
2 | 8 | Capabilities Type
|
Capabilities type allows for use of non-default capabilities to customize the LTPI implementations. | |||||||
3 | 8 | Request LTPI Capabilities | LTPI capabilities are defined in the Default LTPI Capabilities Encoding table. | |||||||
4 | 8 | |||||||||
5 | 8 | |||||||||
6 | 8 | |||||||||
7 | 8 | |||||||||
8 | 8 | |||||||||
9 | 8 | |||||||||
10 | 8 | |||||||||
11 | 8 | Reserved | Reserved | |||||||
12 | 8 | Reserved | Reserved | |||||||
13 | 8 | Reserved | Reserved | |||||||
14 | 8 | Reserved | Reserved | |||||||
15 | 8 | CRC | CRC8 checksum |