Serial Debug on SC13048

I want the USB for COM CDC for my Application and move the debug to UART1.
It is not clear to me what to do with the MOD pin, I tried a bunch of things


I would measure the voltage on the MOD pin in the factory state. If it is 3.3v the I would ground the pin for serial debug. If zero, apply 3.3v.

Looks like this page is missing that info Debugging

A low on the pin will change the interface to serial.

Thanks, everything works, debugging on UART-1 works.
USB comes up as a COM port on the PC.

CDC is typically limited to 64 KBytes/second
is that 512kbps

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