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适用于QSFP封装光模块,定义了硬件管脚,低速信号的功能,I2C时序等,做光模块开发、测试、认证必备资料。
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PUBLISHED SFF-8636 Rev 2.10a
Management Interface for 4-lane Modules and Cables Page 1
Copyright © 2019 SNIA. All rights reserved.
SFF-8636
Specification for
Management Interface for 4-lane Modules and Cables
Rev 2.10a September 24, 2019
SECRETARIAT: SFF TA TWG
This specification is made available for public review at http://www.snia.org/sff/specifications. Comments may be
submitted at http://www.snia.org/feedback. Comments received will be considered for inclusion in future revisions
of this specification.
ABSTRACT: This specification defines a common management interface for 4-lane pluggable transceiver modules
and cable assemblies. Physical layer and mechanical details of the connector interface are outside the scope of this
document.
POINTS OF CONTACT:
David Lewis Chairman SFF TA TWG
Lumentum Email: SFF-Chair@snia.org
400 N. McCarthy Blvc.
Milpitas, CA 95035
Ph: (408) 546-5448
Email: david.lewis@lumentum.com
PUBLISHED SFF-8636 Rev 2.10a
Management Interface for 4-lane Modules and Cables Page 2
Copyright © 2019 SNIA. All rights reserved.
Intellectual Property
The user's attention is called to the possibility that implementation of this specification may require the use of an
invention covered by patent rights. By distribution of this specification, no position is taken with respect to the
validity of a claim or claims or of any patent rights in connection therewith.
This specification is considered SNIA Architecture and is covered by the SNIA IP Policy and as a result goes through
a request for disclosure when it is published. Additional information can be found at the following locations:
• Results of IP Disclosures: http://www.snia.org/sffdisclosures
• SNIA IP Policy: http://www.snia.org/ippolicy
Copyright
The SNIA hereby grants permission for individuals to use this document for personal use only, and for corporations
and other business entities to use this document for internal use only (including internal copying, distribution, and
display) provided that:
1.
Any text, diagram, chart, table or definition reproduced shall be reproduced in its entirety with no
alteration, and,
2.
Any document, printed or electronic, in which material from this document (or any portion hereof) is
reproduced shall acknowledge the SNIA copyright on that material, and shall credit the SNIA for granting
permission for its reuse.
Other than as explicitly provided above, there may be no commercial use of this document, or sale of any part, or
this entire document, or distribution of this document to third parties. All rights not explicitly granted are expressly
reserved to SNIA.
Permission to use this document for purposes other than those enumerated (Exception) above may be requested
by e-mailing copyright_request@snia.org. Please include the identity of the requesting individual and/or company
and a brief description of the purpose, nature, and scope of the requested use. Permission for the Exception shall
not be unreasonably withheld. It can be assumed permission is granted if the Exception request is not acknowledged
within ten (10) business days of SNIA's receipt. Any denial of permission for the Exception shall include an
explanation of such refusal.
Disclaimer
The information contained in this publication is subject to change without notice. The SNIA makes no warranty of
any kind with regard to this specification, including, but not limited to, the implied warranties of merchantability
and fitness for a particular purpose. The SNIA shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishing, performance, or use of this specification.
Suggestions for revisions should be directed to http://www.snia.org/feedback/.
PUBLISHED SFF-8636 Rev 2.10a
Management Interface for 4-lane Modules and Cables Page 3
Copyright © 2019 SNIA. All rights reserved.
Foreword
The development work on this specification was done by the SNIA SFF TWG, an industry group. Since its formation
as the SFF Committee in August 1990, the membership has included a mix of companies which are leaders across
the industry.
For those who wish to participate in the activities of the SFF TWG, the signup for membership can be found at
http://www.snia.org/sff/join.
Revision History
Rev 0.9
- Clarified wording in 6.2.2
Rev 1.0
- Added missing reservation entries (Bytes 133, 134, and 220). Modified bit entry labels (Bytes 93
and 136).
Rev 1.2
- Editorial: Formatted Word controls to improve pagination breaks and comply with style guide.
Rev 1.3
- Table 20 Identifier Values and Table 24 Encoding Values modified to point to SFF-8024 as the
reference for later values and codes.
Rev 1.4
- Added Revision Compliance Byte. Changed Bytes 1, 131, 138, 146, 164, 188, and 189 to comply
with latest SFF-8436 map. Added 12 Gbps SAS bit in Byte 133. Various grammatical changes made.
Rev 1.5
- Added functionality for QSFP28 (4x25G, 4x28G) transceivers per the requirements of 100GE, EDR
Infiniband and 128GFC Fibre Channel. Tables 7, 8, 10, 12, 13, 17, 19, 20, 21, 23, 29, 29A, 32A,
36, 37, 41 and section 6.2.5, 6.3.6, 6.3.12, 6.3.27.
Rev 1.6
- Abstract and Scope corrected to include transceiver modules as well as shielded cables as
intended applications.
Rev 1.7 January 24, 2014
- Editorial: Expanded 2.1 to include specifications referenced in the body. Near -invisible
superscripts were modified to be visible text and cross-references made dynamic.
- Reference to SFF-8078 in Table 13 Control Function Bytes corrected to SFF-8079.
- Table 20 Identifier Values and Table 24 Encoding Values which had been retained in the text for
information were removed.
- Table 23 Specification Compliance and Table 29A Extended Ethernet Compliance Codes tables
were moved to SFF-8024.
Rev 1.9 January 27, 2014:
- Clarified Address 5 Loss of Lock indicators as latched
- Added Address 93 bit 2 High Power Class Enable lockout feature
- Clarified Address 98 CDR controls as 1b=On and 0b=Off (ie. bypassed)
- Clarified Table 21 for Address 129 bits 1-0 to refer to Address 93 bit 2
- Added Adaptive EQ indicator in Address 193 bit 3.
- Clarified Address 194 bits 7-6 setting as 1b=Controllable, 0b=Fixed
- Added Address 220 bit 2 to identify Tx Power diagnostic monitoring supported
- Added Page 03h Address 224 to define magnitude of Tx EQ and Rx Emph supported
- Added Tx Adaptive EQ capability indicator, Page 00h, Address 193 bit 3
- Added Tx Adaptive EQ (per ch) control bits in Page 03h, Address 241 bits 3-0
- Added Tx Adaptive EQ Fault flag in Address 6 and masking bits in Address 101
- Added Rx output amplitude support indicators in Page 03h Byte 225
- Added text to section 6.3.2 indicating that the power class identifiers specify worst case maximum
power dissipation.
- Added Initialization complete flag to Byte 6 bit 0.
Rev 2.0 August 6, 2014:
- Changed the amplitude setting 0 from 200-400 to 100-400mv.
PUBLISHED SFF-8636 Rev 2.10a
Management Interface for 4-lane Modules and Cables Page 4
Copyright © 2019 SNIA. All rights reserved.
- Added Version 2 to address 141.
- Added Version 2 Rate Select table to Table 14 with: 00 as under 12Gb/s, 01 as between 12Gb/s
and 24Gb/s, 10 as between 24Gb/s and 26Gb/s and 11 is above 26Gb/s
- Changed revision register compliance bit for revision 1.9 to 2.0 (1.9 was never released)
- Editorial changes to fix spelling and maintain consistent naming.
Rev 2.1 August 21, 2014:
- Assigned Page 00h Bytes 111-112 for use by PCI-SIG
- Restored Table 23 and Table 24 from SFF-8024
- Replaced 'See SFF-8024 Table 4-x' with 'See SFF-8024 Transceiver Management'
- Made Page/Address Byte, Page/Address, Page/Byte synonyms common: as Page/Byte
- Added Page/Byte/Bit location to those table titles which did not have it
- Alphabetized abbreviations and added some that were missing
- Deleted 'Ethernet' in respect to Extended Specification Compliance Codes
- Replaced Figure 13 with current use of memory
- Other minor corrections e.g. added 'h' as in Page 00h when it was missing
Rev 2.2
- During the review of Rev 2.1 it was recommended that:
- the contents of Table 22 Connector Type be moved to SFF-8024.
- the contents of Table 24 Encoding Values be returned to SFF-8024.
- Other minor editing improvements
Rev 2.3
- Nomenclature of 10e in Section 2.5 Abbreviations replaced by 10^
Rev 2.4 November 7, 2014:
- Adopted Figure/Table numbering style of current template
- To make correlation of previous Change History easier for readers, a Cross Reference of Figures
and Tables was prepared.
Rev 2.5 April 18, 2015:
-Table 6-30 split creating new Table 6-31. Old Tables 6-31 to 6-35 become new Tables 6-32 to 6-
36.
Figure 1-1 updated to reference SFF-8665 (QSFP28)
2.1 Industry Documents - added SFF-8665
Table 5-3 updated to include Bytes 93, 98, 99 and 107
Table 5-6 updated to include sub-headings with page numbers and to add Bytes 94-97, 100-104,
105-106, 111-112, 114-118. Changed description of Page 03h Bytes 226-241 to Optional Channel
Controls. Added Page 03h Bytes 254-255.
6.1 Overview. Added fourth paragraph explaining details of non-implemented pages.
Figure 6-1. Updated Page 00h descriptions for Bytes 22-33, 100-104, 105-106, 108-110, 111-112,
113 and 114. Removed '(Cable Assemblies)' from Page 03h sub-heading.
6.1.1.1 shortened column descriptions by removing 'applications' from each one.
Table 6-1. Updated descriptions at Bytes 22-33, 86-98, 99, 100-104, 105-106, 108-110, 111-112,
113, 114-118.
6.2.2 Status Indicators. Added text to third sentence of first paragraph to emphasize that both the
IntL pin and bit are asserted upon completion of a power up reset.
Table 6-3. Added value 07h for rev 2.5. Added text to value 00h - 'Do not use for...'. Updated value
01h to say SFF-8436 rev 4.8 or earlier.
Table 6-5. Additional description for Byte 6 bit 0 Initialization Complete Flag referencing Table 6-
25 for the new Initialization Complete Implemented bit.
6.2.4 Free Side Device Monitors. Added fifth paragraph to explain placement of temperature sensor.
Table 6-8. Added Bytes 66-73 description for reserved channel monitor set 5.
Table 6-13. Corrected Byte 101 bits 7-4 names from L-Tx… to M-Tx…
6.2.9 Free Side Device Properties. Added paragraphs 5 and 6 to explain the purpose of Byte 113
bits 3-0 and Byte 113 bits 6-4. This byte is added for breakout cables.
Table 6-14. Added Byte 113 bits 6-4 Far End Implementation and bits 3-0 Near End Implementation
descriptions.
6.2.11 Page Select. Added last sentence to define behavior when the host writes an unsupported
PUBLISHED SFF-8636 Rev 2.10a
Management Interface for 4-lane Modules and Cables Page 5
Copyright © 2019 SNIA. All rights reserved.
page value.
Table 6-15. Removed sub-headers for Base ID, Extended ID and Vendor Specific ID Fields. Changed
Name of Byte 130 from 'Connector, Media' to 'Connector Type'. Updated description of Byte 146
to clarify that all cable assemblies are in units of 1m and OM4 fiber lengths are in units of 2m.
6.3.8 through 6.3.12. Added words to clarify usage for separable modules and for cable assemblies.
6.3.13. Additional sentence referencing Byte 130 (connector type) to distinguish active optical cable
(AOC) from separable module (SM).
Table 6-20. Added '/ Undefined' to value 1000b.
6.3.27 Diagnostic Monitoring Type. Added additional words to fourth and fifth paragraphs to explain
the treatment of Byte 220 bits 3-2 when not set.
Table 6-25. Added Byte 221 bit 4 Initialization Complete Flag Implemented, with explanation.
Table 6-29. Reformatted with # Bytes column and updated descriptions.
Table 6-31. Added Byte 225 bits 5-4 Rx output emphasis type with description.
Table 6-32. Bytes 226-233 from Vendor Specific to Reserved. Added descriptions for Byte 241 bits
3-0 to specify that adaptive equalization is the default if it is implemented.
Table 6-35. Code 1xxx from Vendor Specific to Reserved.
6.6.2 Optional Channel Controls. Added 2 sentences at the end of first paragraph to explain that
free side devices can limit the maximum emphasis supported using Byte 224.
Rev 2.6 June 19, 2015:
Title changed per request to comply with the lexicon
Table 5-4 and other content consolidated into Table 5-3.
Rev 2.7 January 26, 2016:
Updates as per “bucket list” comment resolution.
Editorial corrections throughout.
Added SAS 24.0 Gbps bit in Table 6-17.
Rev 2.9 April 21, 2017:
Published version incorporating editorial comments received during approval ballot.
Cover Page: added David Lewis to Points of Contact.
Expressions of Support by Manufacturers: Removed names pending new ballot.
Cross Reference of Figures and Tables: Added new Table 6-10 and incremented all Table numbers
from 6-11 to 6-37
2.1 Industry Documents: added SFF-8436, INF-8438, SFF-8679.
Figure 6-1 Common Memory Map: changed description of bytes 100-104 to match other places in
the document.
Table 6-2 Status Indicators: Byte 2, bits 7-4 now reserved for microQSFP MSA module state field.
Improved descriptions for byte 2 bits 1-0.
Table 6-3 Revision Compliance: Added 08h for SFF-8636 Rev 2.8.
Table 6-5 Free Side Monitor Interrupt Flags: Added byte 6, bit 1 for TEC readiness flag.
Table 6-9 Control Function Bytes: New descriptions for Byte 93, bit 2-0.
6.2.6 Control Functions: 4 new paragraphs describing power levels and related control functions.
New Table 6-10 Truth Table for Enabling Power Classes. All following table numbers increased by
1.
6.2.7.2 Extended Rate Selection: Modified first sentence to clarify that page 00h, byte 195 bit 5
needs to be set for rate selection to be supported.
Table 6-14 Hardware Interrupt Pin Masking Bits: Added byte 103, bit 1 for TEC readiness flag
masking bit.
Table 6-15 Free-Side Device Properties: Byte 114 removed from reserved and assigned for
microQSFP MSA maximum duration fields.
Table 6-16 Upper Page 00h Memory Map: Added definition to byte 142 Length (SMF) to say that a
value of 1 shall be used for reaches from 0 to 1 km. Added a new use for byte 145 Length (OM1
62.5 um) or Copper Cable Attenuation. Corrected byte 189 copper cable attenuation frequency
from 12 to 12.9 GHz.
Table 6-19 Extended Rate Select Compliance Tag Assignment: Modified description of byte 141
bits 1-0.
6.3.11 Length (OM1) or Copper Cable Attenuation: Added new paragraph describing support for
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