How to Access RFIO pin

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I am trying to use pin 3 of the SAMB11 to be able to use the blueetooth antenna. We have a custom PCB board so we are not using the ATSAMB11-MR210CA/MR510CA module. The problem is that when using the Atmel START pinmux configurator it initializes pin 3 as the following:



Unknown port type. 


This causes a compilation because of the Unknown port type.


Has anyone successfully operated pin 3 of the SAMB11 to use the antenna?


Any guidance will help!


Thank you