Article ID: 000075737 Content Type: Troubleshooting Last Reviewed: 10/17/2011

Instantiation of CPRI channels with PDD might generate error messages in the Quartus II software for Cyclone IV GX

Environment

  • Quartus® II Subscription Edition
  • BUILT IN - ARTICLE INTRO SECOND COMPONENT

    Critical Issue

    Description

    If you attempt to instantiate two CPRI channels with PLL phase circuitry detector (PFD) feedback turned on, the Fitter generates errors similar to the following:

    Error: Following nodes use the same resource INTERQUAD_TXRX_CLK_X0_Y28_N0_I3

    Error: Node "lib_xcvr_channel_module:channel_inst0|rx_pcs_clkout" is currently placed at location RXPCS_X0_Y16_N8 with a Global Signal type of Auto

    Error: Node "lib_xcvr_channel_module:channel_inst1|rx_pcs_clkout" is currently placed at location RXPCS_X0_Y22_N8 with a Global Signal type of Auto

    These errors occur because the Fitter is unable to place the two CPRI channel automatically.

    Resolution

    Use the quartus_cbf.exe command line executable to regenerate the .hexout file, or close and then reopen the Convert Programming Files dialog box before regenerating the file.

    Related Products

    This article applies to 1 products

    Cyclone® IV FPGAs