Synthesis warning: Skipping pad insertion on <pin> due to black_box_pad_pin attribute.

• Related Articles

• Synthesis Warning: Removing unused instance VDB-5034

  Description: In Synthesis, the user can encounter the warning removing unused instance VDB-5034. Solution: This usually means the instance is floating and not used. To address this warning, users can modify their RTL code or apply a synthesis ...

• 2781 - Why do I get the message "ERROR - map: IO buffer em_ddr_data_c_0 drives IO buffer em_ddr_data_pad_0 directly, but this is not possible" on most DDR3 interface signals after instantiation of a Lattice DDR3 IP core?

  This FAQ is applicable to all Lattice DDR memory controller IP cores (DDR1/DDR2/DDR3/DDR3-PHY/LPDDR). When a DDR memory interface signal uses a dedicated DDR I/O function, the DDR memory controller or PHY IP core netlist file (.ngo) includes an I/O ...

• Lattice Diamond: Where can i find the Black box model for MachXO3D that is targeting Cadence?

  For Diamond 3.12 SP1, The mentioned Black box is not included. Users may access the files here for now: https://latticesemi.exavault.com/share/view/3dcdb-2m7g7h7x The Black box is integrated in the SW tool on Diamond 3.13 and Above.

• 341 - Lattice ispVM system: Can I ignore Synplify Pro "Unrecognized synthesis directive attribute" warnings?

  Description: User encounters a warning relating to unrecognized synthesis attributes. This is a known issue on the SW. Solution: The HDL code for blocks that IPexpress generates may contain synthesis properties targeting Exemplar/Precision/Mentor ...

• 1249 - Lattice Diamond: Synthesis: How do I initialize ORCALUT via Synthesis?<br>

  Lattice Diamond: Synthesis: You can define "init" attribute on a specific ORCALUT4 that you want to instantiate. Synthesis will translate the "init" to appropriate "lut_function" in the edif netlist that it writes out. Below is a small example with ...