Low Latency Ethernet 10G MAC Intel® Arria® 10 FPGA IP Design Example User Guide
ID
683063
Date
1/11/2022
Public
1. Quick Start Guide
2. 10M/100M/1G/10G Ethernet Design Example for Intel® Arria® 10 Devices
3. 1G/10G Ethernet Design Example for Intel® Arria® 10 Devices
4. 10GBASE-R Ethernet Design Example for Intel® Arria® 10 Devices
5. 1G/2.5G Ethernet Design Example for Intel® Arria® 10 Devices
6. 1G/2.5G/10G Ethernet Design Example for Intel® Arria® 10 Devices
7. 10M/100M/1G/2.5G/5G/10G (USXGMII) Ethernet Design Example for Intel® Arria® 10 Devices
8. Interface Signals Description
9. Configuration Registers Description
10. Low Latency Ethernet 10G MAC Intel® Arria® 10 FPGA IP Design Example User Guide Archives
11. Document Revision History for the Low Latency Ethernet 10G MAC Intel® Arria® 10 FPGA IP Design Example User Guide
2.3.2. Clocking Scheme
The following diagrams show the clocking scheme for the design example.
Figure 8. Clocking Scheme for Ethernet Design Example with IEEE 1588v2 Feature
Note: The IOPLL input reference clock is sourcing from input clock through the global clock network. Sourcing reference clock from a cascaded PLL output, global clock or core clock network may introduce additional jitter to the ATX/FPLL/IOPLL output. Refer to this KDB Answer for a workaround you should apply to the IP core in your design.
Figure 9. Clocking Scheme for Ethernet Design Example without IEEE 1588v2 Feature
Note: The IOPLL input reference clock is sourcing from input clock through the global clock network. Sourcing reference clock from a cascaded PLL output, global clock or core clock network may introduce additional jitter to the ATX/FPLL/IOPLL output. Refer to this KDB Answer for a workaround you should apply to the IP core in your design.