System Setup→South Cluster Configuration→Usb Configuration - VersaLogic VL-EPU-4011 Reference Manual

System Setup
Option: eMMC Max Speed
HS400 (default)
HS200
DDR50
Details: Select the eMMC max Speed allowed.
Option: SCC UFS Support (D29:F0)
Disable (default)
Enable
Details: Enable/Disable UFS SDIO Support
Option: SCC SDIO Support (D30:F0)
Disable (default)
Enable
Details: Enable/Disable SCC SDIO Support
System Setup→South Cluster Configuration→USB
Configuration
Option: XHCI Pre-Boot Driver
Enable
Disable (default)
Details: Enable/Disable XHCI Pre-Boot Driver support.
Option: xHCI Mode
Enable (default)
Disable
Details: Once disabled, XHCI controller would be function disabled, none of the USB
devices are detectable and usable during boot and in OS. Do not disable it unless for
debug purpose.
Option: USB VBUS
Off
ON (default)
Details: VBUS should be ON in HOST mode. It should be OFF in OTG device mode.
VL-EPU-4011 BIOS Reference Manual 48