Advantech AIMB-787 User Manual page 69

3.2.2.15 USB Configuration
Legacy USB Support

This supports USB device under legacy OS such as DOS. When choosing
"AUTO", the system will automatically detect if any USB device is plugged into
the computer and enable USB legacy mode when a USB device is plugged in
and disable USB legacy mode when no USB device is plugged in.
XHCI Hand-off

This is a workaround for OS without XHCI hand-off support. The XHCI owner-
ship change should be claimed by XHCI driver.
USB Mass Storage Driver Support

"Enable or Disable" USB Mass Storage driver support.
USB transfer time-out

Allows you to select the USB transfer time-out value. [1,5,10,20sec]
Device reset time-out

Allows you to select the USB device reset time-out value. [10,20,30,40sec]
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 take from Hub descriptor.
Mass Storage Devices

Mass storage device emulation type. "Auto" enumerates device according to
their media format. Optical drives are emulated as "CD-ROM"', drives with no
media will be emulated according to a drive type.
Figure 3.34 USB Configuration
57 AIMB-787 User Manual