38.6.1.4 Speed Control

Device Mode

When the USB interface is in Device mode, the speed selection (Full-speed or High-speed) is performed automatically by the USBHS during the USB reset according to the host speed capability. At the end of the USB reset, the USBHS enables or disables high-speed terminations and pull-up.

It is possible to set the USBHS_DEVCTRL.SPDCONF.

Host Mode

When the USB interface is in Host mode, internal pull-down resistors are connected on both D+ and D- and the interface detects the speed of the connected device, which is reflected by the Speed Status (USBHS_SR.SPEED) field.