The SOM board files introduce a SOM connector abstraction that allows the hardware configuration to focus on SOM connector level physical mapping. This is intended to help eliminate the need for the carrier card designer to have to create a physical pin translation table.
The SOM connector infrastructure uses the convention of: <connector name> + <_> + <connector_pin_number>. For
example, a SOM connector pin name of som240_1_c18
refers to the pin C18 of the SOM240_1 connector. Using this convention and the XDC
get ports functionality, a carrier card
constraints file can be described in terms of a SOM physical interface when combined
with a SOM constraint file that captures the AMD Zynq™
UltraScale+™ MPSoC to SOM connector pin definition.