I am working on an economic module to be able to use serial communication with the Sparkfun SAMD21 mini development card. And I have one, the DTR (of my CH340G) do I have to connect it to the reset of my MCU? I mean, to reset the board, do I just have to press the reset button on the module or both (the MCU and the USB / UART module)? I enclose the schematic of how I made the small module, if anyone has suggestions or recommendations, I appreciate them.
It occurred to me to review the diagram of the arduino nano, which has the integrated USB / UART bridge, and from what I see, the DTR connects to the reset of the microcontroller and then to the button.