Siemens SIMATIC IPC627D Operating Manual page 24

BIOS Setup (SCU)
3.4 Advanced menu
"USB Configuration" submenu
Parameter
USB BIOS Support
USB Precondition
XHCI Pre-Boot Driver
XHCI
xHCI Mode
The following Setup parameter is visible if "xHCI Mode"" is Enabled or Auto:
•
24
Meaning
Disabled
Enabled
UEFI Only
Optimize USB enumeration (connection process) and reduce
connection time (Enabled) or do not optimize (Disabled).
Switches on (Enabled) or switches off (Disabled) compatibility mode of the
USB3 host controller for operating systems that do not support USB3.
Disabled
Enabled
Auto
Smart Auto
If activated (Enabled), a USB 3 port can be forced into the high-speed
HS Port Switch #
2
mode (USB 2.0).
Switches the support of USB keyboard, mouse and stor-
1
age media on (Enabled) or off (Disabled) in UEFI and
DOS environments.
USB keyboard, mouse and storage media are only
supported in UEFI environments.
USB 3.0 support is switched off.
USB 3.0 support is switched on.
During the BIOS boot stage, USB 2.0 support only. After
the operating system has started, an OS-specific USB 3.0
driver takes over the control.
During the BIOS boot stage, only USB 2.0 is supported.
USB 3.0 support becomes available during the
subsequent warm restart, after the OS-specific USB 3.0
driver has re-configured the XHCI controller.
Operating Manual, 05/2016, A5E33664825-AB
BIOS Description