Various techniques for enabling the control and monitoring of a USB device mode controller to a USB-C connector, for the performance of a USB device mode data connection, are disclosed herein. In an example, a computing system that includes multiple USB-C connectors but a single USB device mode controller may manage the mapping of the controller to a particular connector, through operations that identify the mapping and the characteristics of the connector, process a request to change the mapping of the device mode controller, and perform the change to the mapping of the device mode controller. Such a change may include a disconnection or reassignment of a particular USB-C connector to the controller. Further examples to determine the availability of a USB device mode controller, and respond to a scenario where the USB device mode controller is not available, are also disclosed.