USB Device Class Definition for Mass Storage Devices
Release 0.90c 03/04/96 1:22 PM
Table of Contents
1. Introduction................................................................................................................................ 1
1.1 Scope ..................................................................................................................................... 1
1.2 Purpose.................................................................................................................................. 2
1.3 Related Documents................................................................................................................ 2
1.4 Terms and Abbreviations ....................................................................................................... 2
2. Management Overview.............................................................................................................. 2
3. Functional Characteristics........................................................................................................ 4
3.1 Operational Model.................................................................................................................. 4
3.2 Interfaces................................................................................................................................ 4
3.3 Functional Characteristics of Mass Storage Device Subclasses ........................................... 5
3.3.1 General Mass Storage Subclass..................................................................................... 5
3.3.2 CD-ROM Subclass .......................................................................................................... 5
3.3.3 Tape Subclass................................................................................................................. 6
3.3.4 Solid State Subclass........................................................................................................ 6
4. Standard Descriptors ................................................................................................................ 6
4.1 Device Descriptor................................................................................................................... 7
4.2 Configuration Descriptor......................................................................................................... 8
4.3 Interface Descriptors.............................................................................................................. 9
4.4 Endpoint Descriptors............................................................................................................ 10
4.4.1 Control Endpoint............................................................................................................ 10
4.4.2 Bulk Input Endpoint........................................................................................................ 10
4.4.3 Bulk Output Endpoint..................................................................................................... 11
4.4.4 Interrupt Endpoint .......................................................................................................... 11
5. Requests................................................................................................................................... 12
5.1 Standard Requests............................................................................................................... 12
5.2 Class-Specific Requests ...................................................................................................... 13
Appendix A Required Device-Specific Commands by Subclass ........................................... 14
Appendix B Solid State SCSI Command Set............................................................................ 16
B.1 Command Set Documentation............................................................................................. 16
B.1.1 Copy Command............................................................................................................... 16
B.1.2 Erase Command.............................................................................................................. 17
B.1.3 Inquiry Command............................................................................................................. 17
B.1.4 Read Command............................................................................................................... 18
B.1.5 Request Sense Command............................................................................................... 19
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