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USB Mass Storage 批量传输协议（英文版）.rar （1个子文件）

USB 大容量储存器批量传输协议（英文版）.pdf 101KB

Universal Serial Bus

Mass Storage Class

Bulk-Only Transport

Revision 1.0

September 31, 1999

Revision 1.0

September 31, 1999

USB Mass Storage Class – Bulk Only Transport Page 2 of 22

Change History

Revision Issue Date Comments

0.7 September 23, 1998 Initial draft, pre-release

0.8 October 6, 1998 Revisions made at the Mass Storage DWG review – Irvine, CA

0.9 October 21, 1998 Revisions made at the Mass Storage DWG review – Plano, TX

0.9a January 5, 1999 Revisions made at the Mass Storage DWG review – Tigard, OR

0.9b February 1, 1999 Additions of LUN support - Milpitas, CA

1.0[RC1] March 5, 1999 RR review - Midway, UT

1.0[RC2] March 23, 1999 Revisions from reflector review comments

1.0[RC3] March 29, 1999 Specification line by line review – Milpitas, CA

1.0[RC4] June 21, 1999 Specification line by line review – RR21 – Milpitas, CA

1.0 September 31, 1999 Final Revision edits for Released Document – SLC, UT

USB Device Class Definition for Mass Storage Devices

INTELLECTUAL PROPERTY DISCLAIMER

THIS SPECIFICATION IS PROVIDED “AS IS” WITH NO WARRANTIES WHATSOEVER INCLUDING ANY

WARRANTY OF MERCHANTABILITY, FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY

OTHERWISE ARISING OUT OF ANY PROPOSAL, SPECIFICATION, OR SAMPLE.

A LICENSE IS HEREBY GRANTED TO REPRODUCE AND DISTRIBUTE THIS SPECIFICATION FOR

INTERNAL USE ONLY. NO OTHER LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO

ANY OTHER INTELLECTUAL PROPERTY RIGHTS IS GRANTED OR INTENDED HEREBY.

AUTHORS OF THIS SPECIFICATION DISCLAIM ALL LIABILITY, INCLUDING LIABILITY FOR

INFRINGEMENT OF PROPRIETARY RIGHTS, RELATING TO IMPLEMENTATION OF INFORMATION IN

THIS SPECIFICATION. AUTHORS OF THIS SPECIFICATION ALSO DO NOT WARRANT OR REPRESENT

THAT SUCH IMPLEMENTATION(S) WILL NOT INFRINGE SUCH RIGHTS.

Contributors

Al Rickey, Phoenix Technologies

Alan Haffner, Lexar Media

Bill Stanley, Adaptec

Calaimany Bhoopathi, Shuttle Technology

Curtis E. Stevens, Phoenix Technologies

Darrell Redford , Iomega Corporation

Dave Gilbert, In-System Design

David G. Lawrence, Global Technology Development

David L. Jolley, Iomega Corporation

David Luke, In-System Design

Eric Luttman, In-System Design

Glen Slick, Microsoft Corporation

Hiromichi Oribe, Hagiwara Sys-ComCo

Jan Matejica, PIMC/Philips

Jim Blackson, Y-E Data, Inc

Jim Quigley, Iomega Corporation

Johan Craeybeckk, PIMC/Philips

Jordan Brown, Sun Microsystems

Kenny Chu, Hagiwara Sys-ComCo

Kenichi Hamada, Y-E Data, Inc

Mark Williams, Microsoft Corporation

Masayuki Kitagawa, Mitsumi

Mike Chen, CMD Technology

Mike Glass, Microsoft Corporation

Mike Liebow, eTEK Labs

Mike Nguyen, TEAC

Mike Poulsen, Iomega Corporation

Moto Watanabe, Hagiwara

N.R. Devanathan, Shuttle Technology

Paramita Das, Sun Microsystems

Pat LaVarre, Iomega Corporation

Peter S'Heeren, PIMC/Philips

Ryota Okazaki, NEC Corporation

Sadao Yabuki, TEAC

Shigeyoshi Hashi, NEC Corporation

Shing F. Lin, Adaptec

Steve Bayless, Hewlett-Packard

Steve Kolokowsky, Anchor Chips

Steven Smith, eTEK Labs

Terry Moore, MCCI

Tim Bradshaw, Iomega Corp

Toyoko Shimizu, Y-E Data, Inc

Trenton Henry, SMSC

Troy Davidson, Iomega Corporation

Tsuyoshi Osawa, TEAC

Yuji Oishi, Hagiwara Sys-Com Co Ltd

Revision 1.0

September 31, 1999

USB Mass Storage Class – Bulk Only Transport Page 3 of 22

Table of Contents

1 Specification Overview and Scope................................................................................... 5

1.1 Scope............................................................................................................................................................. 5

2 Terms and Abbreviations.................................................................................................. 6

2.1 Conventions .................................................................................................................................................. 6

2.2 Definitions..................................................................................................................................................... 6

3 Functional Characteristics................................................................................................ 7

3.1 Bulk-Only Mass Storage Reset (class-specific request)................................................................................ 7

3.2 Get Max LUN (class-specific request).......................................................................................................... 7

3.3 Host/Device Packet Transfer Order .............................................................................................................. 8

3.4 Command Queuing ....................................................................................................................................... 8

3.5 Bi-Directional Command Protocol................................................................................................................ 8

4 Standard Descriptors ........................................................................................................ 9

4.1 Device Descriptor.......................................................................................................................................... 9

4.1.1 Serial Number ....................................................................................................................................... 9

4.1.2 Valid Serial Number Characters.......................................................................................................... 10

4.2 Configuration Descriptor ............................................................................................................................ 10

4.3 Interface Descriptors................................................................................................................................... 11

4.4 Endpoint Descriptors................................................................................................................................... 11

4.4.1 Bulk-In Endpoint................................................................................................................................. 11

4.4.2 Bulk-Out Endpoint.............................................................................................................................. 12

5 Command/Data/Status Protocol ..................................................................................... 13

5.1 Command Block Wrapper (CBW).............................................................................................................. 13

5.2 Command Status Wrapper (CSW).............................................................................................................. 14

5.3 Data Transfer Conditions............................................................................................................................ 15

5.3.1 Command Transport............................................................................................................................ 15

5.3.2 Data Transport..................................................................................................................................... 15

5.3.3 Status Transport .................................................................................................................................. 16

5.3.4 Reset Recovery.................................................................................................................................... 16

6 Host/Device Data Transfers ............................................................................................ 17

6.1 Overview..................................................................................................................................................... 17

6.2 Valid and Meaningful CBW ....................................................................................................................... 17

6.2.1 Valid CBW.......................................................................................................................................... 17

6.2.2 Meaningful CBW................................................................................................................................ 17

6.3 Valid and Meaningful CSW........................................................................................................................ 17

6.3.1 Valid CSW.......................................................................................................................................... 17

6.3.2 Meaningful CSW ................................................................................................................................ 17

6.4 Device Error Handling................................................................................................................................ 17

6.5 Host Error Handling.................................................................................................................................... 18

6.6 Error Classes............................................................................................................................................... 18

6.6.1 CBW Not Valid................................................................................................................................... 18

6.6.2 Internal Device Error........................................................................................................................... 18

6.6.3 Host/Device Disagreements................................................................................................................ 18

6.6.4 Command Failure................................................................................................................................ 18

6.7 The Thirteen Cases...................................................................................................................................... 18

6.7.1 Hn - Host expects no data transfers..................................................................................................... 19

6.7.2 Hi - Host expects to receive data from the device............................................................................... 20

6.7.3 Ho - Host expects to send data to the device....................................................................................... 21

Revision 1.0

September 31, 1999

USB Mass Storage Class – Bulk Only Transport Page 4 of 22

List of Tables

Table 3.1 – Bulk-Only Mass Storage Reset .............................................................................................................7

Table 3.2 –Get Max LUN ........................................................................................................................................7

Table 4.1 - Device Descriptor..................................................................................................................................9

Table 4.2 - Example Serial Number Format ..........................................................................................................10

Table 4.3 - Valid Serial Number Characters..........................................................................................................10

Table 4.4 - Configuration Descriptor.....................................................................................................................10

Table 4.5 – Bulk-Only Data Interface Descriptor..................................................................................................11

Table 4.6 - Bulk-In Endpoint Descriptor ...............................................................................................................11

Table 4.7 – Bulk-Out Endpoint Descriptor............................................................................................................12

Table 5.1 - Command Block Wrapper...................................................................................................................13

Table 5.2 - Command Status Wrapper...................................................................................................................14

Table 5.3 - Command Block Status Values ...........................................................................................................15

Table 6.1 - Host/Device Data Transfer Matrix.......................................................................................................19

List of Figures

Figure 1 - Command/Data/Status Flow .................................................................................................................13

Figure 2 - Status Transport Flow ..........................................................................................................................15