What are the typical rules for sharing a Tx PLL between multiple transceiver instances on Stratix V, Arria V, and Cyclone V transceiver devices?

Description

The typical rules for sharing a Tx PLL between multiple transceiver instances on Stratix® V, Arria® V, and Cyclone® V transceiver devices are as follows.

• All transceiver instances intended to share a Tx PLL must have a common refclk input.
• All transceiver instances intended to share a Tx PLL must have a common Tx PLL VCO (base data rate) frequency.
• All transceiver instances intended to share a Tx PLL must have common Tx PLL reset or power down inputs.
• All transceiver instances intended to share a Tx PLL must have common reconfiguration controller.
• Sharing Tx PLLs for designs that also implement dynamic reconfiguration require a Quartus® II XCVR_TX_PLL_RECONFIG_GROUP QSF assignment for each transceiver sharing the Tx PLL.

Failure to adhere to the above requirements may result in a Quartus® II No Fit error.

You can refer to the device specific handbook or PHY IP Userguide for further information.