Why are there two different setup relationships for timing paths to the altera_reserved_tdo port in the TimeQuest Timing Analyzer?

Description

Due to a problem in the Quartus® II software version 12.0 SP1 and later, you may see two different relationships for timing paths to the altera_reserved_tdo port. This problem occurs in Arria® V, Cyclone® V and Stratix® V designs that use the SignalTap™ II Logic Analyzer and manually constrain the altera_reserved_tdo port.

The TimeQuest™ Timing Analyzer incorrectly reports timing paths from both the rising edge and the falling edge.

Resolution

This problem is fixed beginning with the Quartus II software version 12.1.