Forum Discussion
The attached screenshot shows an example of what I am seeing.
As can be seen on the inputs there is a ! symbol implying they are inverted.
In the upper right in the screenshot there is asingle LUTMask listed for the F3 . Two LUTs appear to be labeled F3 in the diagram though So my question is:
The top 2 3-Input LUTs are both names F3 in the resource property editor. As there is only 1 LUT mask listed for F3 I assume these have the same SRAM configuration memory bits that define the function meaning they implement the same function. However it appears they also have identical inputs which wouldnt make sense to be performing the same function on the exact same inputs so I assume I am misunderstanding this somehow. Additionally the LUTMask is 4 hex digits as opposed to the 2^3=8 bits required to define a 3 input function. Can someone explain is the function of the 3 input LUTs both named 3 actually performing different functions (ie one using first 2 hex symbols of LUTmask and the other using the other 2 hex symbols?) Or does this mean something else entirely that I am missing.
Thanks