SPRUJB3 March 2024 AM67 , AM67A , TDA4AEN-Q1 , TDA4VEN-Q1
As the USB controller modules present in this device are DRD (Dual-Role Devices), they can support operation as either a USB Host or a USB Device. The operational mode determination is made based on the state of the USBn_ID pin; when this pin is grounded, the controller will operate as a USB Host, when this pin is left floating, the controller assumes the role of a USB Device. For implementations that do not require DRD functionality, the USBn_ID pin can either be left floating or can be grounded in the board design depending on the static role required. For implementations that do require DRD functionality, the USBn_ID pin should be connected directly to the corresponding ID pin on a USB Micro-AB socket. In doing so, the USBn_ID pin will be correctly terminated (open or grounded) depending on the cable attached and the controller will enter Host or Device mode accordingly.