Figure 5.13Usb Configuration - Advantech ARK-2231R-S9A1E User Manual

5.2.2.10 USB Configuration
Legacy USB Support

Enables support for legacy USB. Auto option disables legacy support if no USB
devices are connected. DISABLE option will keep USB devices available only
for EFI applications.
 XHCI Hand-Off
This is a workaround for OS without XHCI hand-off support. The XHCI owner-
ship change should be claimed by the XHCI driver.
 EHCI Hand-Off
This is a workaround for OS without EHCI hand-off support. The EHCI owner-
ship change should be claimed by EHCI driver.
USB Mass Storage Driver Support

This item allows you to enable or disable the USB mass storage device support.
 USB transfer time-out
The time-out value for Control, Bulk and Interrupt transfers.
Device reset time-out

USB mass storage device start unit command time-out.
 Device power-up delay
Maximum time the device will take before it properly reports itself to the host
controller. "Auto" uses default value: for a Root port it is 100 ms, for a hub port
the delay is taken from hub descriptor.
Figure 5.13 USB Configuration
41 ARK-2231R User Manual