■
Device Power-Up Delay
—This setting specifies the maximum time a
device takes before it properly reports itself to the host controller. When set
to
Auto
, a root port is granted 100 ms, and for a hub port, the delay value
is taken from the hub descriptor. When set to
Manual
, you can set the delay
manually. The default value for this setting is
Auto
.
■
Device Power-Up Delay in Seconds
—This setting specifies the number
of seconds the Power-On Self Test waits for a USB device or hub to power on.
This setting is visible only if
Device Power-Up Delay
is set to
Manual
. The
default is 5 seconds.
In addition, the following option is available for each detected device if a USB mass
storage device is present:
■
Emulation Type
—This setting specifies how the BIOS presents the USB
mass storage device to the system. You can use this option to present a USB
mass storage device as a floppy, Zip, hard disk, or CD-ROM drive. The default
is
Auto
, which allows the BIOS to treat small USB flash disk drives as floppy
drives and larger USB flash disk drives as hard disk drives.
Thunderbolt Configuration Submenu
Use this submenu to enable or disable Thunderbolt support and configure the
Thunderbolt security level.
■
Control IOMMU Pre-Boot Behavior
—This option enables or disables
IOMMU pre-boot behavior. The default value is
Enabled
. You may want to
disable this option when certain PXI Express cards or eGPU do not support
IOMMU being present in the system.
■
ITBT Port Configuration
—Use this option to bring up ITBT per port
configuration. Use this option to enable or disable Thunderbolt ports and
reconfigure Thunderbolt resources per port.
© National Instruments
19
PXIe-8822/42/62 Getting Started
