文件名称：Universal Serial Bus Usage Tables for HID Power Devices
文件大小：197KB
文件格式：PDF
更新时间：2013-02-11 18:51:04
usb power
This document defines the communication of Power Source Devices within the Universal Serial Bus (USB) protocol as a Human Interface Device (HID). Various devices can have integrated hardware power control of internal components and/or batteries. The same functionality can also be associated with devices powered from external power sources, such as uninterruptible power supplies (UPS). In either case, status and control communication within the USB protocol is desirable for energy conservation, reset, and/or system shutdown.