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Chapter 8: Decode Requests
USB Protocol Suite User Manual
For field definitions, please refer to the Universal Serial Bus Specification, version 2.0.
The USB specification is available from the USB Implementers Forum (USB-IF) at:
USB Implementers Forum
1730 SW Skyline Blvd.
Suite 203
Portland, OR 97221
Tel: +1/503.296.9892
Fax: +1/503.297.1090
Web: http://www.usb.org/
8.3.3 Decoding Class Requests
Examples of a class request are Mass-Strg Class UFI CBI Requests,
PTP Still Image Class Requests, Video Class Requests, and Wire Adapter Class
Requests.
To decode a class request:
Step 1 From the USB Device Request menu, select Decode ... Request to display the
View Fields for ... Class Requests text box.
The following figure shows a Wire Adapter Class Requests decoding:
8.3.4 Decoding Vendor Requests
To decode a vendor request:
•
From the USB Device Request menu, select Decode ... Request to display
the View Fields for ... Vendor Requests text box.
An example of a vendor request is Command Set.
8.3.5 Decoding Undefined USB/WUSB Device Requests
A Decoding Request may not belong to any of the defined decoding groups (Standard,
Class, or Vendor).
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