Manual

KINO-PVN-D5251/D4251/ Mini ITX SBC
Page 82
 USB Function [Enabled]
Use the USB Function BIOS option to enable or disable USB function support.

Disabled
USB function support disabled

Enabled DEFAULT
USB function support enabled
 USB 2.0 (EHCI) Support [Enabled]
Use the USB 2.0 (EHCI) Support BIOS option to enable or disable USB 2.0 support.

Enabled DEFAULT
USB 2.0 (EHCI) support enabled

Disabled
USB 2.0 (EHCI) support disabled
 Set Spread Spectrum Function [Disabled]
The Set Spread Spectrum Function option can help to improve CPU EMI issues.

Disabled DEFAULT
The spread spectrum mode is disabled

Enabled
The spread spectrum mode is enabled