Device Family: Arria® II GX, Stratix® IV GT, Stratix® IV GX

Type: Answers

Area: Component, HSIO



Are there any known issues with the transceiver rx_eqdcgain PMA control in Stratix IV GX and Arria II GX devices?

Description

Yes, a known issue exists with the transceiver rx_eqdcgain PMA control in Stratix® IV GX and Arria® II GX devices.

The rx_eqdcgain value of all channels within an altgx MegaWizard® Plug-In Manager instance are overwritten by the rx_eqdcgain value of logical channel 0.

The issue is seen when both the "Use 'logical_channel_address' port for Analog controls reconfiguration" and "Use the same control for all channels" options are disabled in the altgx_reconfig MegaWizard Plug-In Manager.

This issue affects Stratix IV GX/GT, Arria II GX and Hardcopy® GX devices compiled in Quartus® II software versions 9.1, 9.1-SP1, and 9.1-SP2.

To workaround this issue select either of the following options in the altgx_reconfig MegaWizard Plug-In Manager:

"Use 'logical_channel_address' port for Analog controls reconfiguration"
or
"Use the same control for all channels"

This issue will be fixed in a future version of the Quartus II software.