Device Family: Arria® V GZ, Stratix® V E, Stratix® V GS, Stratix® V GT, Stratix® V GX
Area: EMIF, Intellectual Property
IP Product: Stratix V GX Advanced Systems Development Kit
The "Additional CK/CK# phase" option is grayed out in the MegaWizard GUI because custom phase shifts for the memory clock is not supported for that device and protocol. The Stratix® V and Arria® V GZ devices only support this option for UniPHY-based DDR2 memory controllers with a frequency of 150MHz or above.