ADLINK cPCI-3620 - Manual (Page 93)

BIOS Setup Utility 81
cPCI-3620
USB Configuration
XHCI Mode
USB2.0 (EHCI)Support
The Intel “Bay Trail” platform only supports one XHCI/EHCI
controller. If the OS selection is Windows 8, XHCI Mode must
be enabled and USB 2.0 (EHCI) must be disabled. If the OS
selection is Windows 7, USB 2.0 (EHCI) must be enabled and
XHCI Mode must be disabled.
PCI Express Configuration
PCI Express Port 0/1/2/3
Enable/Disable PCI Express Port 0/1/2/3 on the chipset.
Speed
Configure the PCIe Port Speed.