Teledyne LeCroy USBTracer_Trainer - Users Manual - Manual (Page 186)

Chapter 8: Decode Requests USB Protocol Suite User Manual
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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:
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).
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/