SFF-8449 / 8636 Conference Call Minutes, September 24, 2009

Olawsky, Barry Barry.Olawsky at hp.com
Wed Sep 30 11:21:24 PDT 2009

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Minutes of SFF-8449 conference call September 24, 2009
Mr. Mark Lettang		       3M
Mr. Greg McSorley		     Amphenol
Mr. Jim McGrath 		       Cinch
Mr. Mickey Felton		      EMC
Mr. Jim David				FCI
Mr. Barry Olawsky		      Hewlett Packard Co.
Mr. Harvey Newman		    LSI Corp.
Mr. Brian Day				 LSI Corp.
Mr. Brad Besmer 		      LSI Corp.
Mr. Tom Palkert 			Luxtera
Mr. Michael Rost		       Molex Inc.
Mr. Gourgen Oganessyan		Intersil
Mr. Alvin Cox				 Seagate Technology
Mr. Toney Chew			      Volex, Inc.
Mr. Atul Sharma 		       Volex, Inc.
15 in attendance
Discuss proposed content for SFF-8636 (Common Management Interface) and
SFF-8449 (Mini Multilane Series Management Interface). SFF-8436 (QSFP+ Copper
and Optical Transceiver) is to be used as a basis for SFF-8636.
Located at bottom of conference call minutes.
Barry Olawsky (HP) kicked off the discussion by presenting a list of proposed
SFF-8436 modifications to be used for the new SFF-8636 (Common Management
Interface) document. Concern was expressed that the existing memory map would
change. Barry reiterated that is not the intent of SFF-8636 (Common
Management Interface) to alter existing memory map assignments. However, new
bytes would need to be reserved in the map to accommodate new features in the
mini-multilane HD design proposed for SAS.
During the discussion of SFF-8436 nomenclature, Barry noted the large number
of references to "QSFP+ module" and the need for more neutral terminology in
SFF-8636. Barry proposed using the terms "master" and "slave" when referring
to the 2-wire bus operation and removing all references to the term "host".
For other cases, Barry proposed using the "free" and "fixed" side
nomenclature already in use in SFF-8644.
This proposal initiated a dialog between Greg, Tom, Gourgen, Gourgen and
Barry. Tom expressed a concern that the reader might not understand what
"free" and "fixed" means for a pluggable optical/electrical transceiver
module. Greg suggested that the electrical port of such a device be referred
to as the "free side" while the optical port referred to as the "fixed side".
Barry suggested adding graphics to the definition section of SFF-8636 to
clarify the distinction to the reader. Alvin made the additional point that
integral to the SFF-8636 definition is the inclusion of a 2-wire protocol.
Clearly, only one port of the optical/electrical transceiver module would
contain such an interface and the other port is out of the scope of SFF-8636.
The meeting adjourned at ~11:30AM CDT
Call schedule:
Next conference call: October 1, 2009
Toll Free Dial in Number: (877)810-9442
International Access/Caller Paid Dial In Number: (636)651-3190
Webex information:
Topic: SAS-2.1 PHY WG
Date: Thursday, October 1, 2009
Time: 10:00 am, Central Daylight Time (GMT -05:00, Chicago)
Meeting Number: 826 515 680
Meeting Password: newsas
(Note: When logging onto WEBEX, please include your company following your
name. This will help the person recording attendance.)
Presented by Barry Olawsky (HP),
Summary of proposed changes for new SFF management interface document:
 *   Replace QSFP+ specific text with a more neutral terminology
 *   Remove QSFP+ specific graphics (mechanical drawings, color graphics,
etc) or text where necessary
 *   More neutral signal interface to accommodate SFF-8449 (for example,
absence of module select, reset and low power mode)
 *   Restore master and slave nomenclature to 2-wire serial bus
 *   Identify 2-wire serial bus as SMB bus (Rob's suggestion)
 *   Separate 2-wire content from memory map content
 *   Reorganize 2-wire bus sections
    *	Overview
    *	Basic functional features (operational modes, addressing, section
    *	Operations (for example, read and write types, section 7.5)
    *	Physical layer (section 4.1.2)
    *	Timing Diagrams and Tables (section 7.2.2,
 *   Create word-based diagrams for all management timing interface diagrams
(The exception is the overall diagram which might be implemented in Visio)
 *   Addition of new SFF-8449 specific signals to memory map (lower power
modes, reduced voltage operation)
 *   Clarify schematic as reference
Nomenclature changes:
Management Interface
Fixed Side
Fixed Side
Module, QSFP+ Module
Free Side, Free Side Device
Free Side, Free Side Device
Host (with respect to 2-wire interface)
Master, 2-wire Master
Master, 2-wire Master
Module, QSFP+ Module (with respect to 2-wire interface)
Slave, 2-wire Slave
Slave, 2-wire Slave

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