See Also

When mapping unequal numbers of inputs and outputs, use the following guidelines:

• Use a text editor to modify the appropriate Library Mapping File (.lmf) if a Quartus^® II function has more or fewer ports than an equivalent third-party function. Include place holders that equate the number of EDIF function ports with the number of Quartus II logic function ports for a particular logic. You can use spaces, closed quotes, or global VCC or GND designations as placeholders.   

If an EDIF cell generated from a third-party design tool function contains more inputs than a Quartus II logic function, the Compiler ignores the extra ports and issues a warning message. Also, if an EDIF cell contains more outputs than the equivalent Quartus II function, and the extra EDIF output signal(s) feeds another function, a warning message is issued.

• If there are more Quartus II input pins than EDIF input ports, map the extra Quartus II input pins to VCC or GND to make them inactive. Be careful to choose intelligent default values. Example
• If there are fewer Quartus II input pins than EDIF input ports, insert an extra comma (,) at the end of the Quartus II function's input list for each of the EDIF input ports that cannot be mapped to the Quartus II function. Example
• If there are more Quartus II output pins than EDIF output ports, the RETURNS section for the EDIF function must contain an extra comma (,) and double quotation marks (") for each of the unmapped outputs in the Quartus II function. Example
• If there are fewer Quartus II output pins than EDIF output ports, the RETURNS section for the Quartus II function must contain commas for each of the EDIF ports that do not map to an Quartus II function port. Example

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