1、ANSI INCITS 323-1998 (R2003)(formerly ANSI NCITS 323-1998)for Information Technology High-Performance Parallel Interface 6400 Mbit/s Physical Layer (HIPPI-6400-PH)Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permit
2、ted without license from IHS-,-,-Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSINCITS 323-1998American National Standardfor Information Technology High-Performance Parallel
3、Interface 6400 Mbit/s Physical Layer (HIPPI-6400-PH)SecretariatInformation Technology Industry CouncilApproved November 20, 1998 American National Standards Institute, Inc.AbstractThis document describes a physical-level, point-to-point, full-duplex, link interface for reliable, flow-con-trolled, tr
4、ansmission of user data at 6400 Mbit/s, per direction, across distances of up to 1 km. A parallelcopper cable interface for distances of up to 40 m is specified. Connections to a separate longer-distanceoptical interface are provided. Small fixed-size micropackets provide an efficient, low-latency,
5、structurefor small transfers, and a component for large transfers.Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Approval of an American National Standard requires review by ANS
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9、erpretation of any American NationalStandard. Moreover, no person shall have the right or authority to issue aninterpretation of an American National Standard in the name of the AmericanNational Standards Institute. Requests for interpretations should beaddressed to the secretariat or sponsor whose
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11、rican National Standards mayreceive current information on all standards by calling or writing the AmericanNational Standards Institute.American National StandardPublished byAmerican National Standards Institute, Inc.11 West 42nd Street, New York, NY 10036Copyright 1999 by Information Technology Ind
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17、 Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-iContentsPageForeword vIntroduction . viii1 Scope . 12 Normative references . 12.1 Approved references 12.2 References under development . 13 Definitions and conventio
18、ns 23.1 Definitions. 23.2 Editorial conventions 23.3 Acronyms and other abbreviations . 34 System Overview 34.1 Links . 34.2 Virtual Channels . 34.3 Micropacket 44.4 Message . 54.5 FRAME and CLOCK signals 54.6 Flow control 64.7 Retransmission. 64.8 Check functions 64.9 Local electrical interface (op
19、tional). 64.10 Copper cable physical layer (optional) . 65 Service interface. 85.1 Service primitives . 85.2 Sequences of primitives . 85.3 Data transfer service primitives 85.4 Admin service primitives. 105.5 Control service primitives . 115.6 Status service primitives. 126 Micropacket contents 136
20、.1 Bit and byte assignments . 136.2 Virtual Channel (VC) selector. 146.3 Micropacket TYPEs 146.4 Sequence number parameters . 156.5 Credit update parameters. 166.6 Check functions 177 Message structure 197.1 MAC header . 197.2 LLC/SNAP header 207.3 Payload. 208 Source specific operations . 208.1 Cre
21、dit update indications on Source side. 208.2 ACK indications on Source side . 20Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-iiPage8.3 ACKs and credit updates to remote end 21
22、8.4 Micropacket retransmission 219 Destination specific operations. 229.1 Link level processing 229.2 Check for Message protocol errors 229.3 Generating ACKs . 2310 Signal line encoding . 2410.1 Signal line bit assignments. 2410.2 CLOCK and CLOCK_2 signals 2410.3 FRAME signal 2610.4 Source-side enco
23、ding for dc balance . 2610.5 Destination-side decoding 2711 Skew compensation . 2711.1 Training sequences 2711.2 Training sequence errors . 2812 Link Reset and Initialization 2912.1 Link Reset 2912.2 Initialize 2912.3 Hold-off timer 3113 Link activity monitoring and shutdown 3113.1 Activity monitori
24、ng 3113.2 Link shutdown 3114 Maintenance and control features 3214.1 Timeouts. 3214.2 Logged events 3215 Local electrical interface (optional). 3315.1 Local electrical interface - output 3415.2 Local electrical interface - input 3415.3 Light present signal 3416 Copper cable interface (optional) . 36
25、16.1 Copper cable interface - output 3616.2 Copper cable interface - input 3716.3 CLOCK_2 . 3716.4 Copper cable connectors . 3916.5 Copper cable specifications . 41Tables1 CRC coverages in a 128-byte Message. 72 Micropacket contents summary 163 Signal line bit assignments in a 16-bit system 244 Sign
26、al line bit assignments in an 8-bit system 255 4b/5b line coding 26Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-iiiPage6 Summary of timeouts 327 Summary of logged events . 328
27、 Local electrical signal timing at Source driver output 359 Local electrical interface, Source driver output. 3510 Local electrical interface, Destination receiver input. 3611 Copper cable interface 3612 Copper cable interface signal timing at Source driver output . 3813 Copper cable interface, Sour
28、ce driver output . 3814 Copper cable interface, Destination receiver input . 3915 Copper cable assembly electrical specifications 4116 Cable layout 42A.1 Parallel LCRC input bits 46A.2 Parallel ECRC input bits . 47A.3 16-bit LCRC generator equations . 48A.4 64-bit LCRC generator equations . 49A.5 80
29、-bit LCRC checker equations 50A.6 64-bit ECRC generator / checker equations . 51Figures1 System overview. 42 HIPPI-6400-PH link showing signal lines 43 Logical micropacket format and naming conventions. 54 Message format 55 Reverse direction control information . 76 HIPPI-6400-PH service interface 8
30、7 Data transfer service primitives 98 Admin service primitives . 109 Control service primitives 1110 Status service primitives . 1211 Control bits summary 1412 LCRC implementation example 1813 ECRC implementation example 1814 Header micropacket contents . 1915 Detailed ULA layout 1916 16-bit system
31、micropacket 2717 8-bit system micropacket 27Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ivPage18 16-bit system training sequence. 2819 8-bit system training sequence. 2820 In
32、itialize and Link Reset sequences . 3021 Local electrical interface block diagram . 3322 One signal (of 12 in each direction) of the local electrical interface . 3423 One signal (of 23 in each direction) of the copper cable interface . 3724 Receiver equivalent circuit . 3725 Receiver eye mask (diffe
33、rential). 3926 Connecting the overall shield . 4127 Receptacle pin assignments 4228 Receptacle . 4329 Cable connector . 44A.1 Encode / decode circuit example . 45A.2 Parallel LCRC generator example 46A.3 Parallel LCRC checker example 47A.4 Parallel ECRC example 48AnnexA Implementation comments . 45A
34、.1 4b/5b encoding and decoding 45A.2 Frequency differences between Source and Destination. 45A.3 LCRC parallel implementation 46A.4 ECRC parallel implementation . 47A.5 Undetected errors. 47A.6 ECRC and LCRC calculation example. 48Copyright American National Standards Institute Provided by IHS under
35、 license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-vForeword (This foreword is not part of American National Standard NCITS 323-1998.)This American National Standard specifies a physical-level, point-to-point, full-du-plex, link interface for reliabl
36、e, flow-controlled, transmission of user data at 6400 Mbit/s,per direction, across distances of up to 1 km. A parallel copper cable interface fordistances of up to 40 m is specified. Connections to a separate longer-distance opti-cal interface are provided. Small fixed-size micropackets provide an e
37、fficient, low-la-tency, structure for small transfers, and a component for large transfers.This standard provides an upward growth path for legacy HIPPI-based systems.This document includes one annex which is informative and is not considered part ofthe standard.Requests for interpretation, suggesti
38、ons for improvement or addenda, or defect re-ports are welcome. They should be sent to the National Committee for InformationTechnology Standards (NCITS), ITI, 1250 Eye Street, NW, Suite 200, Washington,DC 20005.This standard was processed and approved for submittal to ANSI by NCITS. Com-mittee appr
39、oval of the standard does not necessarily imply that all committee mem-bers voted for approval. At the time it approved this standard, NCITS had thefollowing members:Karen Higginbottom, ChairmanDavid Michael, Vice-ChairmanMonica Vago, SecretaryOrganization Represented Name of RepresentativeAMP, Inc.
40、 John HillCharles Brill (Alt.)Apple Computer, Inc. David MichaelJerry Kellenbenz (Alt.)AT- A full-duplex link capable of independent full-bandwidth transfers in both direc-tions simultaneously;- Four virtual circuits providing a limited multiplexing capability;- A fixed-size transfer unit, i.e., a 3
41、2-byte micropacket, for hardware efficiency;- A small transfer unit resulting in low latency for short Messages, and a compo-nent for large transfers;- Credit-based flow control that prevents buffer overflow;- End-to-end, as well as link-to-link, checksums;- Automatic retransmission to correct flawe
42、d data providing guaranteed, in-order,reliable, data delivery;- An ac coupled parallel electrical interface for driving parallel copper cable overlimited distances;- A parallel electrical interface for driving a local optical interface for longer dis-tances.Copyright American National Standards Inst
43、itute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AM
44、ERICAN NATIONAL STANDARD ANSI NCITS 323-19981High-Performance Parallel Interface 6400 Mbit/s Physical Layer (HIPPI-6400-PH)1 ScopeThis American National Standard specifies aphysical-level, point-to-point, full-duplex, link in-terface for reliable, flow-controlled, transmissionof user data at 6400 Mb
45、it/s, per direction, acrossdistances of up to 1 km. A parallel copper cableinterface for distances of up to 40 m is specified.Connections to a separate longer-distance opticalinterface are provided. Small fixed-size micro-packets provide an efficient, low-latency, structurefor small transfers, and a
46、 component for largetransfers.Specifications are included for: automatic retransmission to correct flaweddata; the format of a small data transfer unit calleda micropacket; a Message structure that includes routing in-formation for network applications; end-to-end, as well as link-to-link, checksums
47、; the timing requirements of the parallel signals; a parallel interface using copper coaxial cable; connections to a separate local optical inter-face; a link-level protocol tuned for a maximumdistance of 1 km.2 Normative referencesThe following standards contain provisions which,through reference i
48、n the text, constitute provisionsof this standard. At the time of publication, theeditions indicated were valid. All standards aresubject to revision, and parties to agreementsbased on this standard are encouraged to investi-gate the possibility of applying the most recenteditions of the standards l
49、isted below.Copies of the following documents can be ob-tained from ANSI: Approved ANSI standards,approved and draft international and regionalstandards (ISO, IEC, CEN/CENELEC, ITU-T),and approved foreign standards (including BSI,JIS, and DIN). For further information, contactANSI Customer Service Department at 212-642-4900 (phone), 212-302-1286 (fax) or via theWorld Wi
