I am new to using TMC2209 motor drivers and I have a question regarding using UART with this driver (I don't know much about UART either). For context, I plan on using two of these drivers with an ATMega328 microcontroller, and the RXD pin of the microcontroller will be used by something else. Since I can't connect the RXD pin of the microcontroller to the TMC2209 for UART interface during normal operation of my circuit, can I use URAT to set the current limit or configure the TMC2209 in general, such as setting StallGuard or StealthChop, before putting it in my circuit? Or does TMC2209 need to be connected to UART the entire time it's being used?
I appreciate any help anyone can provide. Thanks!