Usb - Sun Microsystems Sun Blade 150 Service Manual

C.12.1.1 Energy Star Power Consumption Tier 1
The table below lists the Energy Star low-power/sleep mode power requirements.
TABLE C-10
Max Continuous Power
rating of PS
≤ 200W
> 200W
C.12.1.2 Energy Star Tier 2, Guideline B
Since the system uses a 250 W power supply, the power budget for the system in
sleep mode is 37.5 W. The following are the requirements of Guideline B:
The computer shall enter a sleep mode after a period of inactivity.
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If the computer is shipped with the capability to be on a network, it shall have the
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ability to enter a sleep mode irrespective of the network technology.
The computer shall retain in sleep mode its ability to respond to all types of
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network requests. There shall be no loss in network functionality available to the
user (e.g., the network functionality available to the user during the sleep mode
shall be the same as that was available before the computer entered the sleep
mode.)
The computer shall consume in the sleep mode, no more than 15% of the
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maximum continuous power rating of its power supply.
C.12.2

USB

USB framework power manages all USB devices. If a USB device is inactive for a
period of time, USB framework puts the device into low power mode. The device is
again brought into full power mode by the USB framework when a user attempts to
use a device or when an application on the host starts an input or output to or from
the device.
All HID (Human Interface Device) hub and storage devices (for example: keyboard
or mouse) are power managed by default if they support wake up. Printers are
power managed only between job outputs.
Note – Activity on the USB keyboard or mouse indicates user intervention, causing
USB framework power to remove the system from low power mode.
C-26 Sun Blade 150 Service Manual • June 2002
Maximum Sleep Mode Power
Watts allowed in Low
Power mode
≤ 30W
15% of max power