I couldn’t find any timing diagrams for the UART functionality. I wanted to know if in the uart1289 function, the CTS are RTS are active high or active low . I am looking to interface it with another micro-controller which uses CTS_n and RTS_n (active low) signals for flow control.
If you’ve not configured the UART or any other peripheral on those pins, they are tristate. If you configure UART with NO_RTSCTS then flow control will be tristated, etc.