The dedicated carrier board must mount the mating connector and connect the desired peripheral interfaces according to ETRA pinout specifications. See the images below for reference:
[[File:ETRA_SOM_-_top_top_pin1_203.png|500px|thumb|ETRA TOP view|none]][[File:ETRA_SOM_-_bottom_bottom_pin2_204.png|500px|thumb|ETRA BOTTOM view|none]]
===Pinout table naming conventions ===