> 3.1 | Booting operating system

> The Windows operating system toggles the signals of the serial interfaces. As a result, the module will be switched on, even if the WinMux2 driver is not active. The driver accesses the connected module only when the virtual ports are accessed.
> If the WinMux driver is used by accessing one or more of the virtual ports, it switches off the module when the last virtual port is closed again. Only TC45 and XC18 do not switch off in this case.