Why can't I merge multiple SDI IP instances sharing a single Tx PLL when implementing the triple standard protocol on Stratix V, Arria V, and Cyclone V transceiver devices?

Description

The SDI IP in Triple Standard mode implements PLL reconfiguration to switch datarates on Stratix® V, Arria® V, and Cyclone® V transceiver devices. If more than one IP instance shares a single transceiver Tx PLL, then the XCVR_TX_PLL_RECONFIG_GROUP .qsf assignment is required. Details of this assignment are described in the 'PLL Reconfiguration' section of the Transceiver PHY IP User Guide.

http://www.altera.com/literature/ug/xcvr_user_guide.pdf

Resolution