AR# 270: 7318/7336 inverted input in UIM causes warning 205
7318/7336 inverted input in UIM causes warning 205
When compiling a design for 7318/36, FITEQN gives the following warning message:
es205:[Warning]The partitioner cannot place node 'D' in the uim because of polarity restrictions on the following input(s): A C Node 'D' will be placed in a macrocell instead. Additional time delay introduced.
The XC7318 and XC7336 do not have inversion capability on input pins (i.e., they cannot invert input signals as they enter the chip).
If an equation is declared as a NODE (UIM), and the equation contains inverted input pin signals, this warning will be issued and the node will not be placed in the UIM.
Do not declare UIM nodes that contain inverted input pin signals in XC7318 and XC7336 designs.