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1、ANSI INCITS 307-1997 (R2002) (formerly ANSI NCITS 307-1997) for Information Technology Serial Storage Architecture Physical Layer 2 (SSA-PH2) Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resal
2、e, 04/29/2007 13:33:37 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:33:37 MDTNo reproduction or
3、networking permitted without license from IHS -,-,- American National Standard for Information Technology Serial Storage Architecture Physical Layer 2 (SSA-PH2) ANSI NCITS 307-1997 Secretariat Information Technology Industry Council Approved December 2, 1998 American National Standards Institute, In
4、c. Abstract This standard describes the Serial Storage Architecture Physical Layer 2 (SSA-PH2). SSA defines a se- rial interface hierarchy to be used for purposes within its distance and performance characteristics, includ- ing but not limited to storage subsystems. The Serial Storage Architecture f
5、ills a need in the evolution from parallel to serial interfaces for storage devices. It meets the space constraints and cabling considerations for high-density storage arrays with a commensurate improvement in reliability (an architected error recovery, redundant paths to devices, a wrap mode for se
6、lf-test, line fault detection, and a balanced signaling scheme that achieves a low error rate) and configurability (the ability to hot-plug devices, the self-configuration capability, the 20 meter length of cable segments). The physical layer allows for a CMOS implementation to achieve an economical
7、 and small package size, an efficient use of bandwidth, a small frame size to reduce buffer expense, and the capability for self-con- figuration are also needed. The physical requirements include 20-meter distance per cable segment, a small number of signals to limit connector and cable expense, and
8、 a low-voltage implementation. Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:33:37 MDTNo reproduction or networking permitted without license from IHS -,-,- Approval of an
9、 American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgement of the ANSI Board of Standards Review, substantial agreement has been reache
10、d by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made towards their resolution. The use of American National Sta
11、ndards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute doe
12、s not develop standards and will in no circumstances give interpretation on any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. Requests for interpr
13、etations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken periodic
14、ally to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. American National Standard Published by American National Standards Institute, Inc. 11 West
15、 42nd Street, New York, NY 10036 Copyright 1998 by Information Technology Industry Council (ITI) All rights reserved. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of the publisher. Printed in the United St
16、ates of America CAUTION: The developers of this standard have requested that holders of patents that may be required or the implementation of the standard, disclose such patents to the publisher. However, neither the developers nor the publisher have undertaken a patent search in order to identify w
17、hich, if any, patents may apply to this standard. As of the date of publication of this standard, following calls for the identification of patents that may be required for the implementation of the standard, notice of one or more claims has been re- ceived. By publication of this standard, no posit
18、ion is taken with respect to the validity of this claim or of any rights in connection therewith. The known patent holder has, however, filed a statement of willingness to grant a license under these rights on reasonable and nondiscriminato- ry terms and conditions to applicants desiring to obtain s
19、uch a license. Details may be obtained from the publisher. No further patent search is conducted by the developer or the publisher in respect to any standard it processes. No representation is made or implied that licenses are not required to avoid infringe- ment in the use of this standard. Copyrig
20、ht American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:33:37 MDTNo reproduction or networking permitted without license from IHS -,-,- i Contents Page Foreword.iv Introduction .vi 1 Scope
21、 . 1 1.1SSA-PH2 characteristics 1 1.2SSA family of standards. 2 2 References. 3 2.1Normative references. 3 2.2Informative references 3 3 Definitions, symbols, and abbreviations. 3 3.1Definitions. 3 3.2Symbols and abbreviations 4 4 Conventions 6 5 Modulation 6 6 Data Rate . 6 7 Electrical requirement
22、s. 6 7.1Line driver. 8 7.2Line receiver. 17 7.3Line segment termination. 20 7.4Ground shift 21 7.5Port connection. 22 7.6System level noise margin 26 8 Interconnections. 27 8.1Internal connectors. 27 8.2Internal Port Connections. 43 8.3Internal options bay connections 45 8.4Internal device power con
23、nections. 46 8.5External connections 47 Tables 1 SSA physical interconnect schemes 6 2 Driver output spectral content. 13 3 Driver system operating parameters 14 4 Driver test parameters 14 5 Line driver operating requirements at the port connector. 15 6 Electrical requirements for Line Driver termi
24、nation. 16 7 Receiver system operating parameters 19 8 Receiver test parameters . 19 9 Receiver operating requirements at the port connector . 20 10 Electrical requirements for line segment termination 21 Copyright American National Standards Institute Provided by IHS under license with ANSI License
25、e=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:33:37 MDTNo reproduction or networking permitted without license from IHS -,-,- ii Page 11 Internal connector options 28 12 Pinouts for internal port device connectors 43 13 Pinout for 4-line internal port device connect
26、ions. 44 14 Pinout for 5-line internal port device connections. 44 15 Pinout for 6-line internal port device connections. 45 16 TTL input pin parameters . 45 17 TTL output pin parameters. 45 18 Options connector pinouts 46 19 Power connector pinouts 47 20 External micro-miniature D device connector
27、pinout 51 21 External micro-miniature D cable pinouts. 51 22 External HSSDC device connector pinout 54 23 External HSSDC cable pinouts 55 24 Transfer impedance requirements for external SSA connections 56 Figures 1 Relationship of the SSA standards. 2 2 Electrical configuration for SSA serial links
28、7 3 Test points 8 4 SSA Line Driver implementation example 9 5 Relationship between LineOut currents at the port connector . 10 6 Test environment for drivers. 11 7 Test environment for driver spectral content 12 8 Driver output spectral content 13 9 SSA driver pulse mask. 13 10 Line Driver terminat
29、ion schematic 16 11 SSA receiver test environment. 17 12 Receiver pulse mask 19 13 Definition of ground shift. 21 14 Lines and line segments. 22 15 Port connection and Port Connection segments 23 16 Port connection segment test load. 24 17 Complex Port Connection 25 18 Port connection coupler 25 19
30、Complex Port Connection examples using PCCs 26 20 Internal unitized backplane connector overview. 30 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:33:37 MDTNo reproduction
31、 or networking permitted without license from IHS -,-,- iii Page 21 Internal unitized backplane connector detail (side view) 30 22 Internal unitized backplane connector detail (end view).31 23 Internal cable and backplane port connector detail 32 24 Internal cable and backplane option connector deta
32、il.32 25 Internal cable and backplane power connector detail.33 26 Internal cable and backplane connector contact detail.34 27 Internal cable and backplane connector contact wipe detail 34 28 Internal cable and backplane port connector detail (2 ports shown) 35 29 Internal cable and backplane option
33、 and power connector detail.36 30 Internal unitized device connector overview.37 31 Internal unitized device connector detail (top view)38 32 Internal unitized device connector detail (end view).39 33 Internal device port connector detail.40 34 Internal device options connector detail .40 35 Interna
34、l device power connector detail .41 36 Internal device connector retention detail.42 37 Internal device connector pin sequencing detail.42 38 External micro-miniature D device connector interface 49 39 External micro-miniature D cable connector interface50 40 External HSSDC device connector interfac
35、e53 41 External HSSDC cable connector interface54 42 Typical construction of external cable.55 Annexes A Transfer impedance testing procedure.57 B Internal connector testing procedure 63 C External micro-miniature D connector testing procedure71 D External HSSDC connector testing procedure .81 E Nul
36、ling of intersymbol jitter83 F Line fault detection scheme example .84 G Circuit for degrading signal amplitude and introducing 85 common mode levels85 H Preferred test configurations for SSA links.87 I Implementation guidelines88 J Reference for copper, polymer dielectric, non-equalized SSA Cable A
37、ssemblies.91 K The use of fiberoptic Port Connection Couplers with SSA .93 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:33:37 MDTNo reproduction or networking permitted w
38、ithout license from IHS -,-,- iv Foreword (This foreword is not part of American National Standard NCITS 307-1997.) This standard was developed by Task Group T10.1 of Accredited Standards Commit- tee NCITS during 1996-97. The standards approval process started in 1997. Annexes A through E are normat
39、ive, annexes F through K are informative annexes and are not part of the standard. Requests for interpretation, suggestions for improvement and addenda, or defect re- ports are welcome. They should be sent to the NCITS Secretariat, Information Tech- nology Industry Council, 1250 Eye Street, NW, Suit
40、e 200, Washington, DC 20005- 3922. This standard was processed and approved for submittal to ANSI by Accredited Standards Committee on Information Technology, NCITS. Committee approval of the standard does not necessarily imply that all committee members voted for approval. At the time it approved t
41、his standard, the NCITS Committee had the following mem- bers: James D. Converse, Chair Karen Higginbottom, Vice Chair Kate McMillan, Secretary Organization RepresentedName of Representative AMP, IncBen Bennett Edward Kelly (Alt.) Apple Computer, IncDavid K. Michael Jerry Kellenbenz (Alt.) AT b) cop
42、per cable operation at 40 MB/s; c) full duplex operation to achieve an aggregate 80 MB/s between two ports; and d) other capabilities that fit within the scope of SSA-PH2 (ANSI NCITS 307-1997) that may be proposed during the development phase by the participants in the project. This document defines
43、 the SSA physical layer 2 (ANSI NCITS 308-1997) of the Serial Storage Architecture (SSA). SSA defines a serial interface hierarchy to be used for purposes within its distance and performance characteristics, including but not limited to storage subsystems. This standard is intended to be used with a
44、n upper layer protocol e.g., SCSI-2 Protocol (ANSI X3.294-1996) or SCSI-3 Protocol (ANSI NCITS 309-1997) and a transport layer e.g., SSA Transport Layer 2 (ANSI NCITS 308- 1997). A major goal of the SSA-PH2 standard (ANSI NCITS 307-1997) is to define a physical layer acceptable to device vendors, lo
45、oking for an evolution from parallel SCSI or SSA-PH1 (ANSI X3.293-1996), and systems designers looking for opportunities to more fully exploit the capabilities inherent to a serial bus. 1.1 SSA-PH2 characteristics This standard defines the physical medium (e.g., encoding, modulation, clocking, line
46、drivers/receivers, connectors, and cables). The essential characteristics of SSA-PH2 (ANSI NCITS 307-1997) include: a) links using copper Cable Assemblies have been demonstrated to operate at 40 MB/s up to 20 m with on-chip CMOS drivers; b) support for optical transducers that allow longer distance
47、connections; c) the link makes optimum use of the physical medium by using full-duplex communication to avoid arbitration overhead and turn-around delay; d) full duplex communication achieves an aggregate 80 MB/s bandwidth (40 MB/s in each direction) between two ports; e) the cables and connectors a
48、re physically compatible with small form factor devices; f) device connector capable of mating with both backplanes and cables; g) an electrically balanced design that reduces EMI and crosstalk; and Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 13:33:37 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI NCITS 307-1997 2 h) a measurement scheme focusing on interoperability at separable connect