How to Configure RFE_CTRL for an External PA/LNA FEM on RTL8735B?

Hardware
1

Hello everyone,

I plan to use the RFE_CTRL signals of the RTL8735B to control an external PA/LNA FEM. Could you please advise how to configure this properly? Are there any relevant reference documents or example code available?

Thank you.

2

Hi @xklqx ,

May we know the reason of using RFE_CTRL signals to control external PA/LNA FEM? (e.g. to control 2.4G / 5G?) It would be great if you could also share with us if you are using module or IC-based solution. Meanwhile, you may fill up this form to help us to understand more about your project in order to support you better.

Thank you.