Timing Constraints in Auto-Generated JESD204B SDC File Causes Timing Violation for Non-JESD IPs.

Description

The set_max_delay constraint in the auto-generated JESD204B SDC file that constrains the timing between the PHY and JESD204B data path are non-JESD specific.

For example:

set_max_delay -from [get_keepers {*inst_sv_hssi_8g_rx_pcs|syncdatain*}] 8.000ns set_max_delay -to [get_keepers {*inst_sv_hssi_8g_tx_pcs|syncdatain*}] 8.000ns

This constraint may limit the timing requirement of other IP cores and cause invalid timing violation.

Resolution

Download and run the available patches:

Quartus II 14.1 Patch 0.28

Quartus II 14.0 Patch 0.36