COMeT10-3900/BIOS Settings
v1.1
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Page 16
4.3.7 SCC
Control the SD/GPIO mux and the on-board eMMC device.
4.3.8 USB
Configure the COMeT10-3900 USB ports and view a summary of installed
devices.
Port 1
Displays “Not Installed” if no device is present.
Otherwise, the device information is displayed.
Device Type
Device Type Identify if the SATA port is connected
to a solid state drive or hard disk drive.
Hard Disk
Drive, Solid
State Drive
Hard Disk
Drive
Feature
Description
Choices
Default
Feature
Description
Choices
Default
SD/GPIO Select
Enables either the SD card interface or on-board
GPIO.
GPIO, SD
SD
SD Max Speed
Selects the SD card interface max speed:
• SDR104 = 208 MHz
• SDR50 = 100 MHz
• DDR50 = 50 MHz
NOTE:
Only available when SD is selected.
SDR104,
SDR50,
DDR50
DDR50
eMMC Interface Enables/disables the on-board eMMC storage
device
Enable,
Disable
Enable
Feature
Description
Choices
Default
USB 3.0 Port #1 Enables/disables USB port #1. When disabled, any
devices plugged into the connector are not detected by
BIOS or OS. This is the top socket on the dual stacked
connector (J17).
Enable,
Disable
Enable
USB 3.0 Port #2 Enables/disables USB port #2. When disabled, any
devices plugged into the connector are not detected by
BIOS or OS. This is the bottom socket on the dual
stacked connector (J17).
Enable,
Disable
Enable
USB 2.0 Ports
#2-7
Enables/disables the USB 2.0 ports. Provides control to
all ports of an 8-port USB 2.0 hub. When disabled, any
devices plugged into any of the ports are not detected
by BIOS or OS.
Enable,
Disable
Enable
Legacy USB
Support
Enables/disables Legacy USB support. The Auto option
disables legacy support if no USB devices are
connected. The Disable option keeps USB devices
available only for EFI applications.
Auto, Enable,
Disable
Enable
XHCI Hand-off Enables/disables a workaround for OSes without XHCI
hand-off support. The XHCI ownership change should
be claimed by XHCI driver.
Enable,
Disable
Enable
USB Mass
Storage Driver
Support
Enables/disables USB mass storage driver support.
The USB mass-storage specification provides an
interface to a number of industry-standard command
sets, allowing a device to disclose its subclass.
Enable,
Disable
Enable
USB transfer
time-out
Sets the time-out value for Control, Bulk, and Interrupt
transfers.
1 sec, 5 sec,
10 sec, 20 sec
20 sec
