Usb configuration – Kontron MSM-LP Manual User Guide V106 User Manual

Page 49

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MSM-LP / BIOS Operation




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45

USB Configuration

Feature

Options

Description

Legacy USB Support

Enabled
Disabled
Auto

Enabled Legacy USB support. Auto option disables Legacy
support if no USB devices are connected. DISABLE option
will keep USB devices available only for EFI applications.

EHCI Hand-off

Enabled
Disabled

This is a workaround for OSes without EHCI hand-off support.
The EHCI ownership change should be claimed by EHCI
driver.

Port 60/64 Emulation

Enabled
Disabled

Enables I/O port 60h/64h emulation support. This should be
enabled for the complete USB keyboard legacy support for
non-USB aware OEes.

USB transfer time-out

1 sec
5 sec
10 sec
20 sec

The time-out value for Control, Bulk, and Interrupt transfers.

Device reset time-out

10 sec
20 sec
30 sec
40 sec

USB mass storage device Start Unit command time-out.

Device power-up delay

Auto
Manuel

Maximum time the device will take before it properly reports
itself to the Host Controller. “Auto” uses default value: for a
Root port it is 100 ms, for a Hub port the delay is taken from
Hub description.

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