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TMS320F280039C: How to realize half-duplex communication in SCI module?

Part Number: TMS320F280039C

Tool/software:

Hello, Ti experts.

I would like to ask how to implement half-duplex communication on SCI module? I see from the GPIO multiplexing Settings that the same GPIO port can only be used as TXD or RXD. Which GPIO port should I use to send and receive data?