A206 Carrier Board with Jetson Nano UART2 (ttyTHS1) has issue

Hi, I am facing issue with UART on 40-pin header (pin 8 & 10 Tx/Rx).

I am trying to communicate with external MCU via UART provided on 40-pin header, I could not see any data transmitted by ttyTHS1, but it is receiving (with some garbage ) data. Loopback is working fine but eventually we need to communicate with external MCU.

Please let me know how to resolve this issue.

Regards,
Chenna

Any updates on this.