Article ID: 000083132 Content Type: Error Messages Last Reviewed: 06/30/2014

Internal Error: Sub-system: CUT, File: /quartus/db/cut/cut_stratixv_lc_pll_group.cpp, Line: 132 altera_xcvr_low_latency_phy

Environment

BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

You may see the following Quartus® II Fitter error if you make a PLL_TYPE ATX assignment to the top level of a Stratix® V GX Low Latency PHY configured with an "FPGA fabric transceiver interface width" of 40 or 66, using Quartus® II Software Versions 11.0SP1 and earlier.

Internal Error: Sub-system: CUT, File: /quartus/db/cut/cut_stratixv_lc_pll_group.cpp, Line: 132
altera_xcvr_low_latency_phy

For the configuration above, the Low Latency PHY will instantiate a Gearbox and fPLL. The ATX PLL_TYPE assignment will conflict with the fPLL insantiated inside the PHY and cause an error.

To work around this issue, you can either:

Assign the PLL_TYPE ATX assignment to the tx_pll only.
Or
Upgrade to Quartus II Software Version 11.1 which has a Tx PLL drop down option. In this case you must remove the PLL_TYPE ATX assignment.

Related Products

This article applies to 3 products

Stratix® V GX FPGA
Stratix® V GS FPGA
Stratix® V FPGAs