System Specification
Device Selection
Early System and Board Planning
Pin Connection Considerations for Board Design
I/O and Clock Planning
Design Entry
Design Implementation, Analysis, Optimization, and Verification
Design Checklist
Appendix: Cyclone® 10 GX Transceiver Design Guidelines
Conclusion
Document Revision History
Calibration
Cyclone® 10 GX FPGA devices contain a dedicated calibration engine to compensate for process variations.
The calibration engine calibrates the analog portion of the transceiver to allow both the transmitter and receiver to operate at maximum performance. Each Cyclone® 10 GX device contains two calibration engines and each engine resides on either side of the device. A hard Nios® II processor controls the calibration flow.
The CLKUSR pin clocks the calibration engine. All transceiver reference clocks and the CLKUSR clock must be free running and stable upon device power-up to successfully complete the calibration process and for optimal transceiver performance.