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Approved ANSI Standard
ANSI/VITA 78.00-2015
SpaceVPX System
Abstract
This document describes an open standard for creating high performance fault tolerant
interoperable backplanes and modules to assemble electronic systems for spacecraft and other
high availability applications. Such systems will support a wide variety of use cases across the
aerospace community. This standard leverages the OpenVPX standards family and the
commercial infrastructure that supports these standards.
Approved: April 2015
American National Standards Institute, Inc.
Secretariat: VITA
ANSI/VITA 78.00-2015 VITA
Copyright © VITA 2015. All Rights Reserved. www.vita.com
info@vita.com
Notices
AMERICAN NATIONAL STANDARD
Approval of an American National Standard requires verification 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 judgment of the ANSI Board of Standards Review, substantial
agreement has been reached 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 toward their resolution.
The use of American National Standards 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 does not develop standards and will in no circumstances give
an interpretation of 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 Standard Institute. Requests for interpretations 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CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time.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 periodically to
reaffirm, revise, or withdraw this standard. Purchases of American National Standards may receive
current information on all standard by calling or writing the American National Standards Institute.
NOTE: The user’s attention is called to the possibility that compliance with this standard may require use
of an invention covered by patent rights.
By publication of this standard, no position is taken with respect to the validity of this claim or of any
patent rights in connection therewith. The patent holder has, however, filed a statement of willingness to
grant a license under these rights on reasonable and nondiscriminatory terms and conditions to
applicants desiring to obtain such a license. Details may be obtained from the standards developer.
TRADEMARKS
VPX™ is a trademark of VITA.
SpaceVPX™ is a trademark of VITA.
COPYRIGHT NOTICE
Published by:
VITA
Copyright © 2015 by VITA
All rights reserved.
Except for employees of VITA member companies, 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 States of America - R1.0, ISBN 1-885731-83-3.
ANSI/VITA 78.00-2015
Copyright
©
VITA 2015. All Rights Reserved.
Table of Contents
1. Introduction ........................................................................................................................................... 2
1.1 Use Case and Essential Elements of the SpaceVPX Standard ................................................... 2
1.1.1 Mesh Data Backplane ........................................................................................................... 4
1.1.2 Switched (Star/Redundant Star) Data Backplane ................................................................. 5
1.1.3 System Controller and Control Plane Connections............................................................... 5
1.1.4 System Controller and Utility Plane Connections ................................................................. 7
1.1.5 Utility Plane Power Connections ........................................................................................... 8
1.1.6 Expansion Plane Extensions ................................................................................................. 9
1.1.7 Expansion Plane Heritage PCI Bus Extensions .................................................................. 10
1.1.8 Typical SpaceVPX Reliability Model ................................................................................... 10
1.2 SpaceVPX Key Element Descriptions ........................................................................................ 12
1.2.1 Backplane Profiles............................................................................................................... 12
1.2.2 Slot Profiles ......................................................................................................................... 12
1.2.3 Standard Chassis Profiles ................................................................................................... 13
1.2.4 Module Profiles .................................................................................................................... 13
1.2.5 SpaceVPX Document Structure Description ....................................................................... 13
1.3 Terminology ................................................................................................................................ 16
1.3.1 Specification Key Words ..................................................................................................... 16
1.4 Glossary ...................................................................................................................................... 17
1.5 Profile Names – Use and Construction ...................................................................................... 23
1.5.1 Slot Profiles ......................................................................................................................... 23
1.5.2 Backplane Profiles............................................................................................................... 24
1.5.3 Module Profiles .................................................................................................................... 25
1.6 Backplane Profile Topologies ..................................................................................................... 26
1.6.1 CEN — Centralized ............................................................................................................. 29
1.6.2 DIS — Distributed Topology ................................................................................................ 29
1.6.3 HYB — Hybrid Topology ..................................................................................................... 29
1.7 SpaceVPX Fault Tolerance ........................................................................................................ 29
1.8 Adding New Profiles to this Standard ......................................................................................... 29
1.9 References .................................................................................................................................. 30
1.9.1 VITA Standards ................................................................................................................... 30
1.9.2 Other Standards .................................................................................................................. 30
1.9.3 Order of Precedence ........................................................................................................... 30
2. SpaceVPX Compliance ...................................................................................................................... 31
3. Utility Plane ......................................................................................................................................... 32
3.1 Maximum Number of Slots ......................................................................................................... 32
3.2 Power Distribution ....................................................................................................................... 32
3.2.1 Power Distribution Profiles for 5V and 12V primary power input modules ......................... 33
3.2.2 Source of VBAT................................................................................................................... 33
3.2.3 Safety Ground ..................................................................................................................... 33
3.2.4 Inrush (Surge) Current ........................................................................................................ 33
3.3 Electrical Standards for Drivers and Receivers .......................................................................... 33
3.3.1 Lower Current Open-Drain Electrical Characteristics ......................................................... 33
ANSI/VITA 78.00-2015
Copyright
©
VITA 2015. All Rights Reserved.
3.3.2
Totem Pole Electrical Characteristics ................................................................................. 34
3.4 System Control Signals .............................................................................................................. 34
3.4.1 System Controller (SYS_CON) ........................................................................................... 35
3.4.2 System Reset ...................................................................................................................... 36
3.4.3 Module Maskable Reset (MaskableReset*) ........................................................................ 37
3.4.4 Non-Volatile Memory Read Only (NVMRO) ........................................................................ 37
3.4.5 System Management Bus (SM[3..0]) .................................................................................. 37
3.4.6 Geographic Address Field ................................................................................................... 39
3.4.7 JTAG Port ............................................................................................................................ 39
3.5 System Reference Clocks .......................................................................................................... 39
3.5.1 REF_CLK+/- Reference Clock ............................................................................................ 40
3.5.2 AUX_CLK+/- Reference Clock ............................................................................................ 41
3.5.3 REF_CLK1+/- Reference Clock .......................................................................................... 42
3.5.4 REF_CLK2+/- Reference Clock .......................................................................................... 42
3.6 Power Supply Select ................................................................................................................... 43
3.7 System Controller Select ............................................................................................................ 45
3.8 System Management Protocol .................................................................................................... 46
3.8.1 IPMC Requirements ............................................................................................................ 48
3.8.2 Chassis Manager Requirements ......................................................................................... 71
3.8.3 Sensors ............................................................................................................................... 76
3.8.4 Mandatory SpaceUM Module Controls ............................................................................... 88
3.8.5 Optional System Management Discrete Signals ............................................................... 102
3.9 Space Utility-Management (SpaceUM) Module Architecture ................................................... 110
3.9.1 System .............................................................................................................................. 110
3.9.2 Common Requirements .................................................................................................... 120
3.9.3 3U SpaceUM Module ........................................................................................................ 131
3.9.4 6U SpaceUM Module ........................................................................................................ 138
3.10 SpaceVPX P0/J0 and P1/J1 Connector Pin Assignments ....................................................... 151
4. Mechanical – General Specifications ............................................................................................... 156
4.1 Slot Pitch ................................................................................................................................... 156
4.2 Connector Family ...................................................................................................................... 156
4.3 Keying ....................................................................................................................................... 157
4.3.1 3U Slot Keying ................................................................................................................... 157
4.3.2 6U Slot Keying ................................................................................................................... 158
4.4 RTM Connectors ....................................................................................................................... 161
4.5 SpaceVPX Modifications to [VITA 48.2] ................................................................................... 161
4.5.1 Plug-In Unit ........................................................................................................................ 161
4.5.2 Floating Metal .................................................................................................................... 169
5. Protocol Specific ............................................................................................................................... 170
5.1 Ethernet .................................................................................................................................... 170
5.2 Serial RapidIO® (SRIO) ............................................................................................................ 170
5.2.1 Connector Pin Mappings ................................................................................................... 170
5.3 SpaceWire ................................................................................................................................ 170
5.3.1 Connector Pin Mappings ................................................................................................... 171
5.4 PCI ............................................................................................................................................ 173
ANSI/VITA 78.00-2015
Copyright
©
VITA 2015. All Rights Reserved.
6.
Common to 6U and 3U — Slot Profiles ............................................................................................ 175
6.1.1 Order of Precedence ......................................................................................................... 175
6.2 Common Requirements for Slot Profiles .................................................................................. 175
6.2.1 Reserved Pins ................................................................................................................... 175
6.2.2 Which lanes, powers and pins are used (unused = reserved) .......................................... 175
6.2.3 Plug-In Module Compatibility with Multiple Slot Profiles ................................................... 175
6.2.4 Assigning Lanes Into Ports ............................................................................................... 176
6.3 Connector Specific Common Requirements for Slot Profiles ................................................... 176
6.3.1 Pin Assignment Tables for Differential Connectors .......................................................... 176
6.3.2 Pin Assignment Tables for Single-Ended Connectors ...................................................... 179
6.3.3 User Defined ..................................................................................................................... 180
7. Common to 6U and 3U — Backplane Profiles ................................................................................. 181
7.1 Order of Precedence ................................................................................................................ 181
7.2 Interconnecting Slots with Pipes ............................................................................................... 181
7.3 Port Jumbling ............................................................................................................................ 181
7.4 Backplane Channel Gbaud Rate .............................................................................................. 181
7.5 System Management ................................................................................................................ 181
7.6 Backplane ................................................................................................................................. 181
7.6.1 3U Backplane .................................................................................................................... 182
7.6.2 6U Backplane .................................................................................................................... 182
7.7 Expansion Plane — Backplane Profiles ................................................................................... 182
7.8 Example Expansion Plane Peripheral Resources .................................................................... 183
7.8.1 Bussed, Attached and Independent Peripherals ............................................................... 184
7.8.2 PCI Peripheral Example .................................................................................................... 185
7.9 Floating Metal ........................................................................................................................... 185
7.10 Removing Connectors .............................................................................................................. 185
8. Common to 6U and 3U — Module Profiles ...................................................................................... 187
8.1 Order of Precedence ................................................................................................................ 187
8.2 6U and 3U Module Cooling Types ............................................................................................ 187
8.3 User Defined Pins ..................................................................................................................... 187
8.4 Unused Ports and Lanes .......................................................................................................... 187
8.5 Plug-In Module Compliance with Multiple Module Profiles ....................................................... 187
8.6 Expansion Plane — Module Profiles ........................................................................................ 187
8.7 XMC / PMC ............................................................................................................................... 188
8.8 Floating Metal ........................................................................................................................... 188
8.9 Removing Connectors .............................................................................................................. 188
9. Common to 6U and 3U — Standard Development Chassis Profiles ............................................... 189
9.1 Order of Precedence ................................................................................................................ 189
9.2 6U and 3U VITA 48.1 Air-Cooled Standard Development Chassis .......................................... 189
9.3 6U and 3U VITA 48.2 Conduction-Cooled Chassis .................................................................. 189
10. 6U Slot Profiles ............................................................................................................................. 190
10.1 6U Slot Profiles Common Section ............................................................................................ 190
10.2 6U Payload Slot Profiles ........................................................................................................... 190
10.2.1 Payload Slot Profile –Switch Topologies (SLT6-PAY-4F1Q2T-10.2.1) ............................ 191
10.2.2 Payload Slot Profile – Mesh (SLT6-PAY-12F1Q2T-10.2.2) .............................................. 195
ANSI/VITA 78.00-2015
Copyright
©
VITA 2015. All Rights Reserved.
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