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Power management – Avalue EMX-CDD User Manual

Page 39

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EMX-CDD

User’s Manual

EMX-CDD

User’s Manual 39

Item

Options

Description

Legacy USB Support

Enabled[Default]

Disabled

Auto

Enables 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[Default]

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

USB transfer time-out

1 sec
5 sec

10 sec

20 sec[Default]

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

Device reset time-out

10 sec

20 sec[Default]

30 sec
40 sec

USB mass storage device Start Unit command
time-out.

Device power-up delay

Auto[Default]

Manual

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 descriptor.

3.6.2.6 Power Management

Item

Options

Description

Power On By PS/2 Keyboard

Disabled [Default]

Anykey

Password

Power On By PS/2 Keyboard.

Power On By PS/2 Mouse

Enabled

Disabled[Default]

Power On By PS/2 Mouse.

Wake By PME

Enabled

Disabled[Default]

Wake By PME.

AC Power Loss

Power Off[Default]

Power On
Last State

AC Power Loss.