Universal Serial Bus Usage Tables for HID Power Devices - USB.org

Universal Serial Bus Usage Tables for HID Power Devices
5. Recommendations for Implementing Collections and
Usages
This section offers recommendations for both implementation of firmware (device side) and application
software (host side) of Power Devices. Specifically, the following tables in this section indicate:
• Which module collections are typically found in various Power Devices (Section 5.1)
• Which sub-module collections are contained in module collections (Section 5.2)
• Which identification items of the Power Device usage page are typically found in module, sub-module and
flow collections (Section 5.3)
• Which other items of the Power Device usage page are typically found in module, sub-module and flow
collections (Section 5.4)
• Which items of the Battery System usage page are typically found in module and sub-module collections
(Section 5.5)
The tables in the following sections give recommendations, not requirements, of this specification. However,
the Smart Battery Specification and OnNow Power Management Specification require certain items to be
compliant (refer to those specifications for up-to-date information.). The tables in the following sections
indicate those items as follows:
• R – This specification’s recommendations
• S – Smart Battery requirements
• O – OnNow requirements
Power Device usage names and Smart Battery names are the same. But Power Device usage names and
OnNow – ACPI names are not identical. The table in Section 5.6 gives equivalence between Power Summary
usage names and related information in ACPI.
5.1 Module and Flow Collections within Power Device Examples
Table 4: Module and Flow Collections in Power Device Examples
Modules
Collections
Usage Names
Power Device Examples
A Simple Power
Supply
USB Power Supply A Rackmount
Receptacle Strip
A Simple UPS A More Complex
UPS
BatterySystem R R R
PowerConverter R R R
OutletSystem R R
Flow R R R R R
Power Summary R,O R,O R,O R,O
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