Article ID: 000079959 Content Type: Error Messages Last Reviewed: 08/08/2023

Error (15629): Atom "comb~6" is dependent on unconnected input ports

Environment

    Quartus® II Subscription Edition
    PLL Reconfig Intel® FPGA IP
BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

You may see the error when instantiating the Altera® PLL Reconfiguration IP and enabling physical synthesis in the Quartus® II software.

Resolution

Modify the altera_pll_reconfig_core.v file as shown below:

  1. Find the generic_lcell_comb module definition
  2. Add (* altera_attribute = "-name ADV_NETLIST_OPT_ALLOWED \"NEVER ALLOW\"" *) before the module keyword.

This problem is fixed in Quartus® Software version 13.1.

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