3-7
COM Express Carrer Board
PCI/PCIE Device Configuration
PCI Latency Timer
Ths tem controls how long each PCI devce can hold the bus before another
takes over. When set to hgher values, every PCI devce can conduct trans-
actons for a longer tme and thus mprove the effectve PCI bandwdth. For
better PCI performance, you should set the tem to hgher values.
EHCI1, EHCI2
Ths settng dsables/enables the USB EHCI controller. The Enhanced Host
Controller Interface (EHCI) specfcaton descrbes the regster-level nterface
for a Host Controller for the Unversal Seral Bus (USB) Revson 2.0.
XHCI Mode
Ths settng dsables/enables the USB XHCI controller. The eXtensble Host
Controller Interface (XHCI) s a computer nterface specfcaton that defnes a
regster-level descrpton of a Host Controller for Unversal Seral bus (USB),
whch s capable of nterfacng to USB 1.0, 2.0, and 3.0 compatble devces.
The specfcaton s also referred to as the USB 3.0 Host Controller specfca-
ton.
Legacy USB Support
Set to [Enabled] f you need to use any USB 1.1/2.0 devce n the operatng
system that does not support or have any USB 1.1/2.0 drver nstalled, such
as DOS and SCO Unx.
Audio Controller
Ths settng enables/dsables the onboard audo controller.
Launch LAN1 OpROM
Ths settng enables/dsables the ntalzaton of the specfed LAN Boot ROM
durng bootup. Selectng [Dsabled] wll speed up the boot process.
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Содержание MS-9988
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