APC UPS control system User Manual

Page 219

|__Device USB version

|__Device info tag #1

where
P:

Vendor=xxxx ProdID=xxxx Rev=xx.xx

|__Product revision number

|__Product ID code

|__Vendor ID code

|__Device info tag #2

String descriptor info:

Manufacturer=ssss

|__Manufacturer of this device as read from the device.

For USB host controller drivers (virtual root hubs) this may

be omitted, or (for newer drivers) will identify the kernel

version and the driver which provides this hub emulation.

|__String info tag

Product=ssss

|__Product description of this device as read from the device.

For older USB host controller drivers (virtual root hubs) this

indicates the driver; for newer ones, it’s a product (and vendor)

description that often comes from the kernel’s PCI ID database.

|__String info tag

SerialNumber=ssss

|__Serial Number of this device as read from the device.

For USB host controller drivers (virtual root hubs) this is

some unique ID, normally a bus ID (address or slot name) that

can’t be shared with any other device.

|__String info tag

Configuration descriptor info:

C:* #Ifs=dd Cfg#=dd Atr=xx MPwr=dddmA
| | |

|__MaxPower in mA

| | |

|__Attributes

| | |

|__ConfiguratioNumber

USB devices may have multiple configurations, each of which act
rather differently.

For example, a bus-powered configuration

might be much less capable than one that is self-powered.

Only

one device configuration can be active at a time; most devices
have only one configuration.

Each configuration consists of one or more interfaces.

Each

interface serves a distinct "function", which is typically bound

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