Ports

All the used port names are defined in module declaration . Ports include all the required ports and optional ports if they are used. Some port names are not explicit in the standard and depend on associated property. One example is the decode output ports. They are of the form Eqn, where the n is the integer value of LPM_Decodes property.

Single Ports
Single port declaration is straight forward in EDIF 2 0 0 and EDIF 3 0 0. For example the clock pin of LPM_FF is declared as follows:

     (port clock (direction INPUT))

Bus Ports
In EDIF 2 0 0, all the bus ports in LPM were flatten as single port due to lack of bus support in EDIF specification. But in EDIF 3 0 0, the bus construct is well defined therefore all the bus ports in LPM cell are maintain as bus in its' cell declaration. . For example with a two-bit output bus in LPM_FF (i.e. LPM_Width = 2), the port name for the Q output pin is declared as:

EDIF 3 0 0 example:

     (port Q0 (outputPort)
         (nameInformation
             (primaryName "Q0"
                 (nameStructure
                     (complexName "Q"
                         (nameDimension
                             (nameDimensionStructure 0)))))))
     (port Q1 (outputPort)
         (nameInformation
             (primaryName "Q1"
                 (nameStructure
                     (complexName "Q"
                         (nameDimension
                             (nameDimensionStructure 1)))))))

     (portBundle Q
         (portList
             (portRef Q1)
             (portRef Q0)
                 (nameInformation
                     (primaryName "Q[1:0]"
                         (nameStructure
                             (complexName "Q"
                                 (nameDimension
                                     (nameDimensionStructure
                                         (sequence 1 0)))))))))

Both input numbers and bus numbers start with zero as the least significant bit. And the rename construct that used to hold original name in EDIF 2 0 0 is replaced by the primaryName in the nameInformation construct.