RapidIO IP Core Has Wrong Default TX VOD Setting in Arria V and Cyclone V Devices

Description

The RapidIO IP core does not set the transceiver TX V_OD value correctly in Arria V (GX, GT, SX, and ST) and Cyclone V devices. The default value violates the RapidIO specification.

This issue affects all RapidIO IP core variations that target a Cyclone V device or an Arria V device other than an Arria V GZ device.

Resolution

To fix this issue, add the following line to the Quartus II Settings File (.qsf) for your Quartus II project:

set_instance_assignment -name XCVR_TX_VOD 50 -to <td>

where <td> is the transmitter serial output pin to your RapidIO link.

This assignment sets the TX V_OD to the value of 500 mV.

This issue will be fixed in a future version of the RapidIO MegaCore function.