Arria V, Arria V GZ, Cyclone V, and Stratix V PCI Express User Guides Show Incorrect Timing for the Transaction Layer Configuration Space Signals

The Arria V, Arria V GZ, Cyclone V, and Stratix V PCI Express User Guides for the Avalon-ST and Avalon-MM interfaces show an incorrect timing diagram for Transaction Layer Configuration Space Signals (tl_cfg*). The Configuration Space Register Access Timing shows tl_cfg_add and tl_cfg_ctl updating every cycle. However, depending on your parameterization, these signals actually update every four or eight clock cycles. In addition, this interface is a multi-cycle path. Depending on the parameters you select, you must sample this interface in the middle of a four- or eight-cycle window to ensure proper operation.

This problem is fixed in October 31, 2016 versions of these user guides.