Incorrect LVDS Frequencies in Quartus II Compilation for the POS-PHY Level 4 MegaCore Function

Description

For most of the data rates, the LVDS frequencies, which the Quartus II software reports after compilation in the Timequest Timing Analyzer under the Clocks section, are incorrect. Though, for some data rates (800 Mbps, 1000 Mbps, 1250 Mbps), the calculated frequencies are correct.

Resolution

To work around this issue, use only the 800-Mbps, 1,000-Mbps or 1,250-Mbps data rates.