National Instruments MXI-2 Reference Manual

TM

MXI

MXI-2 Configuration Reference Manual

MXI-2 Configuration Reference Manual

October 2002 Edition

Part Number 370476B-01

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For further support information, see the Technical Support and Professional Services appendix. To comment on
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Important Information

Warranty

The National Instruments MXIbus boards and accessories are warranted against defects in materials and workmanship for a period of one year
from the date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace equipment
that proves to be defective during the warranty period. This warranty includes parts and labor.

The media on which you receive National Instruments software are warranted not to fail to execute programming instructions, due to defects
in materials and workmanship, for a period of 90 days from date of shipment, as evidenced by receipts or other documentation. National
Instruments will, at its option, repair or replace software media that do not execute programming instructions if National Instruments receives
notice of such defects during the warranty period. National Instruments does not warrant that the operation of the software shall be
uninterrupted or error free.

A Return Material Authorization (RMA) number must be obtained from the factory and clearly marked on the outside of the package before
any equipment will be accepted for warranty work. National Instruments will pay the shipping costs of returning to the owner parts which are
covered by warranty.

National Instruments believes that the information in this document is accurate. The document has been carefully reviewed for technical
accuracy. In the event that technical or typographical errors exist, National Instruments reserves the right to make changes to subsequent
editions of this document without prior notice to holders of this edition. The reader should consult National Instruments if errors are suspected.
In no event shall National Instruments be liable for any damages arising out of or related to this document or the information contained in it.

E

XCEPT AS SPECIFIED HEREIN, NATIONAL INSTRUMENTS MAKES NO WARRANTIES, EXPRESS OR IMPLIED, AND SPECIFICALLY DISCLAIMS ANY WARRANTY OF

MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. CUSTOMER’S RIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF

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ATIONAL INSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTO MER. NATIONAL INSTRUMENTS WILL NOT BE LIA BLE FOR
DAMAGES RESULTIN G FROM LOSS OF DATA, PROFITS, USE OF PRODUCTS, OR INCIDENTAL OR CONSEQUENTIAL DAMAGES, EVEN IF ADVI SED OF THE POSSIB ILITY
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negligence. Any action against National Instruments must be brought within one year after the cause of action accrues. National Instruments
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damages, defects, malfunctions, or service failures caused by owner’s failure to follow the National Instruments installation, operation, or
maintenance instructions; owner’s modification of the product; owner’s abuse, misuse, or negligent acts; and power failure or surges, fire,
flood, accident, actions of third parties, or other events outside reasonable control.

Copyright

Under the copyright laws, this publication may not be reproduced or transmitted in any form, electronic or mechanical, including photocopying,
recording, storing in an information retrieval system, or translating, in whole or in part, without the prior written consent of National
Instruments Corporation.

Trademarks

CVI™, LabVIEW™, Measurement Studio™, MITE™, MXI™, National Instruments™, NI™, NI-488.2™, ni.com™, NI-VISA™, and NI-VXI™ are
trademarks of National Instruments Corporation.

Product and company names mentioned herein are trademarks or trade names of their respective companies.

Patents

For patents covering National Instruments products, refer to the appropriate location: Help»Patents in your software, the patents.txt file
on your CD, or ni.com/patents.

WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS

(1) NATIONAL INSTRUMENTS PRODUCTS ARE NOT DESIGNED WITH COMPONENTS AND TESTING FOR A LEVEL OF
RELIABILITY SUITABLE FOR USE IN OR IN CONNECTION WITH SURGICAL IMPLANTS OR AS CRITICAL COMPONENT S IN
ANY LIFE SUPPORT SYSTEMS WHOSE FAILURE TO PERFORM CAN REASONABLY BE EXPECTED TO CAUSE SIGNIFICANT
INJURY TO A HUMAN.

(2) IN ANY APPLICATION, INCLUDING THE ABOVE, RELIABILITY OF OPERATION OF THE SOFTWARE PRODUCTS CAN BE
IMPAIRED BY ADVERSE FACTORS, INCLUDING BUT NOT LIMITED TO FLUCTUATIONS IN ELECTRICAL POWER SUPPLY,
COMPUTER HARDWARE MALFUNCTIONS, COMPUTER OPERATING SYSTEM SOFTWARE FIT NESS, FITNESS OF COMPILERS
AND DEVELOPMENT SOFTWARE USED TO DEVELOP AN APPLICATION, INSTALLATION ERRORS, SOFTWARE AND
HARDWARE COMPATIBILITY PROBLEMS, MALFUNCTIONS OR FAILURES OF ELECTRONIC MONITORING OR CONTROL
DEVICES, TRANSIENT FAILURES OF ELECTRONIC SYSTEMS (HARDWARE AND/OR SOFTWARE), UNANTICIPATED USES OR
MISUSES, OR ERRORS ON THE PART OF THE USER OR APPLICATIONS DESIGNER (ADVERSE FACTORS SUCH AS THESE ARE
HEREAFTER COLLECTIVELY TERMED “SYSTEM FAILURES”). ANY APPLICATION WHERE A SYSTEM FAILURE WOULD
CREATE A RISK OF HARM TO PROPERTY OR PERSONS (INCLUDING THE RISK OF BODILY INJURY AND DEATH) SHOULD
NOT BE RELIANT SOLELY UPON ONE FORM OF ELECTRONIC SYSTEM DUE TO THE RISK OF SYSTEM FAILURE. TO AVOID
DAMAGE, INJURY, OR DEATH, THE USER OR APPLICATION DESIGNER MUST TAKE REASONABLY PRUDENT STEPS TO
PROTECT AGAINST SYSTEM FAILURES, INCLUDING BUT NOT LIMITED TO BACK-UP OR SHUT DOWN MECHANISMS.
BECAUSE EACH END-USER SYSTEM IS CUSTOMIZED AND DIFFERS FROM NATIONAL INSTRUMENTS' TESTING
PLATFORMS AND BECAUSE A USER OR APPLICATION DESIGNER MAY USE NATIONAL INSTRUMENTS PRODUCTS IN
COMBINATION WITH OTHER PRODUCTS IN A MANNER NOT EVALUATED OR CONTEMPLATED BY NATIONAL
INSTRUMENTS, THE USER OR APPLICATION DESIGNER IS ULTIMATELY RESPONSIBLE FOR VERIFYING AND VALIDATING
THE SUITABILITY OF NATIONAL INSTRUMENTS PRODUCTS WHENEVER NATIONAL INSTRUMENTS PRODUCTS ARE
INCORPORATED IN A SYSTEM OR APPLICATION, INCLUDING, WITHOUT LIMITATION, THE APPROPRIATE DESIGN,
PROCESS AND SAFETY LEVEL OF SUCH SYSTEM OR APPLICATION.

Compliance

FCC/Canada Radio Frequency Interference Compliance

Determining FCC Class

The Federal Communications Commission (FCC) has rules to protect wireless communications from interference. The FCC
places digital electronics into two classes. These classes are known as Class A (for use in industrial-commercial locations only)
or Class B (for use in residential or commercial locations). Depending on where it is operated, this product could be subject to
restrictions in the FCC rules. (In Canada, the Department of Communications (DOC), of Industry Canada, regulates wireless
interference in much the same way.)

Digital electronics emit weak signals during normal operation that can affect radio, television, or other wireless products. By
examining the product you purchased, you can determine the FCC Class and therefore which of the two FCC/DOC Warnings
apply in the following sections. (Some products may not be labeled at all for FCC; if so, the reader should then assume these are
Class A devices.)

FCC Class A products only display a simple warning statement of one paragraph in length regarding interference and undesired
operation. Most of our products are FCC Class A. The FCC rules have restrictions regarding the locations where FCC Class A
products can be operated.

FCC Class B products display either a FCC ID code, starting with the letters EXN,
or the FCC Class B compliance mark that appears as shown here on the right.

Consult the FCC Web site at

FCC/DOC Warnings

This equipment generates and uses radio frequency energy and, if not installed and used in strict accordance with the instructions
in this manual and the CE Mark Declaration of Conformity*, may cause interference to radio and television reception.
Classification requirements are the same for the Federal Communications Commission (FCC) and the Canadian Department
of Communications (DOC).

Changes or modifications not expressly approved by National Instruments could void the user’s authority to operate the
equipment under the FCC Rules.

http://www.fcc.gov for more information.

Class A

Federal Communications Commission

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated
in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct
the interference at his own expense.

Canadian Department of Communications

This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.

Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.

Class B

Federal Communications Commission

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

Canadian Department of Communications

This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.

Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.

Compliance to EU Directives

Readers in the European Union (EU) must refer to the Manufacturer’s Declaration of Conformity (DoC) for information*
pertaining to the CE Mark compliance scheme. The Manufacturer includes a DoC for most every hardware product except for
those bought for OEMs, if also available from an original manufacturer that also markets in the EU, or where compliance is not
required as for electrically benign apparatus or cables.

To obtain the DoC for this product, click Declaration of Conformity at
by product family. Select the appropriate product family, followed by your product, and a link to the DoC appears in Adobe
Acrobat format. Click the Acrobat icon to download or read the DoC.

* The CE Mark Declaration of Conformity will contain important supplementary information and instructions for the user or

installer.

ni.com/hardref.nsf/. This Web site lists the DoCs

Contents

About This Manual

How To Use the Manual Set..........................................................................................xi

Conventions ...................................................................................................................xii

Related Documentation..................................................................................................xii

Chapter 1
Introduction

How to Use This Manual...............................................................................................1-1

MXI-2 Description.........................................................................................................1-2

MXI-2 Interface Kit Overview ......................................................................................1-2

Hardware Description ....................................................................................................1-3

Chapter 2
PCI-MXI-2 Configuration and Installation

Configure the PCI-MXI-2..............................................................................................2-1

Configuration EEPROM .................................................................................2-3

Onboard DRAM ..............................................................................................2-3

Install the PCI-MXI-2....................................................................................................2-4

Chapter 3
PCI-MXI-2 Universal Configuration and Installation

Configure the PCI-MXI-2 Universal .............................................................................3-1

Configuration EEPROM .................................................................................3-3

Onboard DRAM ..............................................................................................3-3

Install the PCI-MXI-2 Universal ...................................................................................3-3

Chapter 4
PXI-8320 Configuration and Installation

Configure the PXI-8320.................................................................................................4-1

Configuration EEPROM .................................................................................4-2

Onboard DRAM ..............................................................................................4-2

Install the PXI-8320.......................................................................................................4-3

© National Instruments Corporation vii MXI-2 Configuration Reference Manual

Contents

Chapter 5
VXI-MXI-2 Configuration and Installation

Configure the VXI-MXI-2 ............................................................................................ 5-1

Front Panel Features........................................................................................ 5-3

Removing the Metal Enclosure....................................................................... 5-3

VXIbus Logical Address................................................................................. 5-3

VXIbus Slot 0/Non-Slot 0............................................................................... 5-5

VXIbus CLK10 Routing ................................................................................. 5-6

Trigger Input Termination .............................................................................. 5-10

MXIbus Termination....................................................................................... 5-11

Configuration EEPROM................................................................................. 5-12

Onboard DRAM.............................................................................................. 5-14

VXIbus Local Bus........................................................................................... 5-16

Install the VXI-MXI-2................................................................................................... 5-17

Connect the MXIbus Cable ........................................................................................... 5-18

Chapter 6
VXI-MXI-2/B Configuration and Installation

Configure the VXI-MXI-2/B......................................................................................... 6-1

Front Panel Features........................................................................................ 6-3

VXIbus Logical Address................................................................................. 6-3

VXIbus Slot 0/Non-Slot 0............................................................................... 6-4

VXIbus CLK10 Routing ................................................................................. 6-6

Trigger Input Termination .............................................................................. 6-9

MXIbus Termination....................................................................................... 6-9

Configuration EEPROM................................................................................. 6-11

Onboard DRAM.............................................................................................. 6-12

VXIbus Local Bus........................................................................................... 6-14

Install the VXI-MXI-2/B............................................................................................... 6-15

Connect the MXIbus Cable ........................................................................................... 6-16

Chapter 7
VME-MXI-2 Configuration and Installation

Configure the VME-MXI-2........................................................................................... 7-1

Front Panel Features........................................................................................ 7-3

VMEbus A16 Base Address ........................................................................... 7-3

MXIbus Termination....................................................................................... 7-4

Configuration EEPROM................................................................................. 7-5

Onboard DRAM.............................................................................................. 7-7

VME-MXI-2 Intermodule Signaling .............................................................. 7-8

MXI-2 Configuration Reference Manual viii ni.com

Install the VME-MXI-2 .................................................................................................7-10

Connect the MXIbus Cable............................................................................................7-10

Appendix A
Specifications

Appendix B
EEPROM Configuration

Appendix C
National Instruments Software Choices

Appendix D
Technical Support and Professional Services

Glossary

Index

Contents

© National Instruments Corporation ix MXI-2 Configuration Reference Manual

About This Manual

This manual contains instructions for installing and configuring the
National Instruments MXI-2 boards. If you received your hardware as part
of a kit, such as the VXI-PCI8000 interface kit, this manual is meant to be
used with Getting Started with Your PCI-Based MXI-2 Interface for
Windows or other operating system-specific getting started manuals.

This manual contains hardware configuration information for the
VXI-MXI-2 (C-size and B-size) and VME-MXI-2, which plug into your
VXI or VME mainframe and link your computer to the VXIbus or
VMEbus, respectively. This manual also describes how to set up the
PCI-MXI-2, PCI-MXI-2 Universal, and PXI-8320 interface boards, which
link your PCI-based computer or PXI/CompactPCI chassis to the MXIbus.

Because the C-size VXI-MXI-2 and the B-size VXI-MXI-2/B are
functionally equivalent, this manual uses the term VXI-MXI-2 to refer to
either module unless otherwise noted.

How To Use the Manual Set

The MXI-2 Configuration Reference Manual contains information on
configuring, installing, and cabling your MXI-2 hardware. You will need to
use this manual in conjunction with Getting Started with Your PCI-Based
MXI-2 Interface for Windows or other operating system-specific getting
started manuals.

The getting started manual contains an overview of the MXI-2 hardware
and the NI-VISA/NI-VXI software, guides you through setting up your kit,
and helps you get started with application development. You can also use
this manual as a reference for the hardware and software default settings
and to find the answers to commonly asked questions.

When you have successfully set up your system, you can begin to develop
applications in NI-VISA and/or the NI-VXI API. Refer to the NI-VISA
User Manual to learn about VISA and how to use it in your system. The
NI-VISA online help also describes the attributes, events, and operations
you can use in NI-VISA. The NI-VXI API online help presents the
concepts of VXI and prepares you for detailed explanations of the NI-VXI
API functions. Study the descriptions of each function given in the online
help utility to fully understand the purpose and syntax of each function.

© National Instruments Corporation xi MXI-2 Configuration Reference Manual

About This Manual

Note You can view the NI-VISA User Manual online. Use the Acrobat Reader program,

version 3.0 or later, to open and navigate through the

NIVISAUM.pdf file.

Conventions

The following conventions appear in this manual:

» The » symbol leads you through nested menu items and dialog box options

to a final action. The sequence File»Page Setup»Options directs you to
pull down the File menu, select the Page Setup item, and select Options
from the last dialog box.

This icon denotes a note, which alerts you to important information.

This icon denotes a caution, which advises you of precautions to take to
avoid injury, data loss, or a system crash.

bold Bold text denotes items that you must select or click on in the software,

such as menu items and dialog box options. Bold text also denotes
parameter names.

italic Italic text denotes variables, emphasis, a cross reference, or an introduction

to a key concept. This font also denotes text that is a placeholder for a word
or value that you must supply.

monospace Text in this font denotes text or characters that you should enter from the

keyboard, sections of code, programming examples, and syntax examples.
This font is also used for the proper names of disk drives, paths, directories,
programs, subprograms, subroutines, device names, functions, operations,
variables, filenames and extensions, and code excerpts.

Related Documentation

The following documents contain information that you might find helpful
as you read this manual:

• ANSI/IEEE Standard 1014-1987, IEEE Standard for a Versatile

Backplane Bus: VMEbus

• ANSI/IEEE Standard 1155-1993, IEEE VMEbus Extensions for

Instrumentation: VXIbus

• ANSI/VITA 1-1994, VME64

• CompactPCI Specification, PCI Industrial Computers Manufacturers
Group

MXI-2 Configuration Reference Manual xii ni.com

About This Manual

• Multisystem Extension Interface Bus Specification, National
Instruments Corporation

• PCI Local Bus Specification, PCI Special Interest Group

• PXI-8320 User Manual, National Instruments Corporation

• PXI Specification, National Instruments Corporation

• VME-MXI-2 User Manual, National Instruments Corporation

• VXI-MXI-2 User Manual, National Instruments Corporation

• VXI-6, VXIbus Mainframe Extender Specification, VXIbus
Consortium

© National Instruments Corporation xiii MXI-2 Configuration Reference Manual

Introduction

This chapter introduces you to MXI-2 and your MXI-2 kit.

How to Use This Manual

The factory default settings for your MXI-2 hardware are suitable for most
typical applications. You may need this manual only to follow the
installation instructions for each board. To try another configuration, use
this manual for instructions on changing your hardware settings.

1

Chapter 2

Chapter 4

Chapter 1

PCI PXI/Compact PCI

Configure and Install

PCI-MXI-2/PCI-MXI-2 Universal

VXI

Using

C-Size or B-Size

VXI-MXI-2?

Configure and Install

VXI-MXI-2

Chapter 5

Gather What You Need

C-Size

Configure and Install

VXI-MXI-2/B

to Get Started

Using PCI

or PXI?

Chapter 3

Using VXI

or VME?

Chapter 6

B-Size

Configure and Install

PXI-8320

VME

Configure and Install

VME-MXI-2

© National Instruments Corporation 1-1 MXI-2 Configuration Reference Manual

Chapter 1 Introduction

MXI-2 Description

MXI-2 is the second generation of the National Instruments MXIbus
product line. The MXIbus is a general-purpose, 32-bit, multimaster system
bus on a cable. MXI-2 expands the number of signals on a standard MXI
cable by including VXI triggers, all VXI interrupts, CLK10, and all of the
utility bus signals (SYSFAIL*, SYSRESET*, and ACFAIL*).

Because MXI-2 incorporates all these new signals into a single connector,
the triggers, interrupts, and utility signals can be extended not only to other
chassis but also to the local CPU in all MXI-2 products using a single cable.
Thus, with MXI-2, CPU interface boards such as the PCI-MXI-2,
PCI-MXI-2 Universal, and PXI-8320 perform as if they were plugged
directly into the VXI/VME backplane.

In addition, MXI-2 boosts data throughput performance past
previous-generation MXIbus products by defining new high-performance
protocols. MXI-2 is a superset of MXI. All accesses initiated by MXI
devices work with MXI-2 devices. However, MXI-2 defines synchronous
MXI block data transfers that surpass previous block data throughput
benchmarks. The new synchronous MXI block protocol increases MXI-2
throughput to a maximum of 33 Mbytes/s between two MXI-2 devices. All
National Instruments MXI-2 boards can initiate and respond to
synchronous MXI block cycles.

Note In the remainder of this manual, the term MXIbus refers to MXI-2.

MXI-2 Interface Kit Overview

This manual contains separate chapters devoted to each National
Instruments MXI-2 controller. When you install one MXI-2 interface
device in your computer and another in your chassis, you connect the two
with a MXIbus cable. The net result is that the computer operates as if it
were installed directly in the VXI/VME chassis.

The interface kits described in this manual link a PCI-based computer or
a PXI/CompactPCI chassis directly to the VXIbus or VMEbus using the
high-speed Multisystem eXtension Interface bus (MXI-2). You can use
these kits on a variety of platforms, including all Microsoft platforms,
Macintosh, and Solaris.

MXI-2 Configuration Reference Manual 1-2 ni.com

The MXI-2 kits, which include a MXI-2 cable and National Instruments
software, are as follows:

• VXI-PCI8000, containing a PCI-MXI-2 or PCI-MXI-2 Universal and
a C-size or B-size VXI-MXI-2

• VXI-PXI8000, containing a PXI-8320 and a C-size or B-size
VXI-MXI-2

• VME-PCI8000, containing a PCI-MXI-2 or PCI-MXI-2 Universal and
a VME-MXI-2

• VME-PXI8000, containing a PXI-8320 and a VME-MXI-2

A PCI-based computer equipped with a VXI-PCI8000 interface, or a
PXI/CompactPCI chassis equipped with a VXI-PXI8000, can function as a
VXI Commander and Resource Manager. A PCI-based computer equipped
with a VME-PCI8000 interface, or a PXI/CompactPCI chassis equipped
with a VME-PXI8000, can function as both a VMEbus master and a slave
device. The MXI-2 interface kit makes your computer behave as if it were
plugged directly into the VXI/VME backplane as an embedded CPU
VXI/VME module.

Hardware Description

Chapter 1 Introduction

The PCI-MXI-2 and PCI-MXI-2 Universal are half-size, PCI-compatible
plug-in circuit boards that plug into one of the expansion slots in your
PCI-based computer. (The PCI-MXI-2 is for 5 V PCI systems, while the
PCI-MXI-2 Universal is for 5 V or the newer 3.3 V PCI systems.) The
PXI-8320 is a 3U-size, PXI/CompactPCI-compatible circuit board that
plugs into one of the peripheral slots in your PXI/CompactPCI chassis.
Both boards link your computer directly to the MXIbus, and vice versa.
Because the PCI-MXI-2, PCI-MXI-2 Universal, and PXI-8320 use the
same communication register set that other VXIbus message-based devices
use, other MXIbus devices view your board as a VXIbus device. The
PCI-MXI-2, PCI-MXI-2 Universal, and PXI-8320 can also function as the
MXIbus System Controller and can terminate the MXIbus signals directly
on the PCI-MXI-2, PCI-MXI-2 Universal, and PXI-8320. In addition, you
can have up to 16 MB of onboard DRAM on your board that can be shared
with the MXIbus and VXI/VMEbus and used as a dedicated data buffer.

The VXI-MXI-2 module is an extended-class, register-based VXIbus
device with optional VXIbus Slot 0 capability so that it can reside in any
slot in a C-size or D-size chassis.

© National Instruments Corporation 1-3 MXI-2 Configuration Reference Manual

Chapter 1 Introduction

Note D-size VXI chassis have connections for a P3 connector. The VXI-MXI-2, however,

does not have this connector and, if configured as a Slot 0 controller, cannot provide the
necessary control for VXI devices that need P3 support.

Note Unless otherwise noted, the term VXI-MXI-2 refers to both the C-size and B-size

modules.

Optionally, you can use the VXI-MXI-2/B, which can reside in any B-size
VXIbus slot. Although they are functionally equivalent, this manual
describes the C-size and B-size VXI-MXI-2 modules in separate chapters.
This is because there are some differences in how you configure the two
modules. The C-size VXI-MXI-2 is housed in a metal enclosure to improve
EMC performance and to provide easy handling. The B-size module does
not require this enclosure.

The VXI-MXI-2 uses address mapping to convert MXIbus cycles into
VXIbus cycles and vice versa. By connecting to the PCI-MXI-2,
PCI-MXI-2 Universal, or PXI-8320 board, the VXI-MXI-2 links the PCI
bus or the PXI/CompactPCI bus to the VXIbus. The VXI-MXI-2 can
automatically determine whether it is located in VXI Slot 0 and if it is the
MXIbus System Controller.

The VME-MXI-2 module is a single-slot, double-height VMEbus device
with optional VMEbus System Controller functions. It uses address
mapping to convert MXIbus cycles into VMEbus cycles and vice versa, just
like the VXI-MXI-2. By connecting to the PCI-MXI-2, PCI-MXI-2
Universal, or PXI-8320 board, it links the PCI bus or the PXI/CompactPCI
bus to the VMEbus. The VME-MXI-2 can automatically determine if it is
located in the first slot of a VMEbus chassis and if it is the MXIbus System
Controller. The VME-MXI-2 requires that the VMEbus chassis comply
with the VME64 protocol to be able to auto-detect Slot 1.

Note The VME-MXI-2 is not equivalent to the VXI-MXI-2/B, although their form factor

is the same. The VXI-MXI-2/B provides VXI trigger, MODID, and CLK10 support, while
the VME-MXI-2 does not.

Also, the VXI-MXI-2 and VME-MXI-2 automatically terminate the
MXIbus if installed as the first or last device in the MXIbus. If installed
in the middle of the MXIbus, both the VXI-MXI-2 and VME-MXI-2
automatically disable MXIbus termination. In addition, you can have up to
64 MB of onboard DRAM on the VXI-MXI-2 and VME-MXI-2 modules
that can either be shared with the VXI/VMEbus and MXIbus or used as a
dedicated data buffer. The MXI-2 products achieve high-performance

MXI-2 Configuration Reference Manual 1-4 ni.com

Chapter 1 Introduction

block transfer rates by integrating the MITE custom ASIC, a sophisticated
dual-channel DMA controller with standard interfaces for VXI, VME,
MXI, PCI, and PXI. By using MITE DMA to transfer data and commands
to and from devices, the MITE frees up a computer’s microprocessor to
perform other tasks such as data analysis and presentation. In addition to
DMA, the MITE incorporates both the new Synchronous MXI protocol and
VME64 MBLT (8-byte block transfers in which both the address bus and
data bus are used to transfer data) directly into the ASIC to perform the
fastest transfers to instruments.

© National Instruments Corporation 1-5 MXI-2 Configuration Reference Manual

PCI-MXI-2 Configuration
and Installation

This chapter contains the instructions to configure and install the
PCI-MXI-2 module. This chapter applies only if your kit contains a
PCI-MXI-2. If you ordered a kit containing a PCI-MXI-2 Universal, refer
to Chapter 3, PCI-MXI-2 Universal Configuration and Installation. If you
ordered a kit containing a PXI-8320, refer to Chapter 4, PXI-8320

Configuration and Installation.

Caution Electrostatic discharge can damage several components on your PCI-MXI-2

module. To avoid such damage in handling the module, touch the antistatic plastic package
to a metal part of your computer chassis before removing the PCI-MXI-2 from the
package.

Configure the PCI-MXI-2

This section describes how to configure the following options on the
PCI-MXI-2:

• Configuration EEPROM

• Onboard DRAM

2

Figure 2-1 shows the location and factory-default settings on the
PCI-MXI-2 module.

© National Instruments Corporation 2-1 MXI-2 Configuration Reference Manual

Chapter 2 PCI-MXI-2 Configuration and Installation

1

1U17 2 DRAM

Figure 2-1. PCI-MXI-2 Parts Locator Diagram

2

MXI-2 Configuration Reference Manual 2-2 ni.com

Configuration EEPROM

The PCI-MXI-2 has an onboard EEPROM, which stores default register
values that are loaded at power-on. The EEPROM is divided into two
halves—a factory-configuration half and a user-configuration half—so you
can modify the user-configurable half while the factory-configured half
stores a backup of the default user settings. The factory configuration is a
minimal configuration that you can use to boot your PCI-MXI-2 regardless
of the changes made to the user configuration. For information about
configuring the onboard EEPROM, refer to Appendix B, EEPROM

Configuration.

Onboard DRAM

The PCI-MXI-2 can accommodate one 72-pin DRAM SIMM. Table 2-1
lists the SIMM types you can use. You can use a 32- or 36-bit SIMM
because DRAM parity is not required. The PCI-MXI-2 can hold up to
16 MB of onboard memory. The PCI-MXI-2 supports DRAM speeds of
80 ns or faster. The maximum allowable size for the DRAM SIMM is 1 in.

Chapter 2 PCI-MXI-2 Configuration and Installation

Table 2-1. PCI-MXI-2 DRAM Configurations

SIMMs Total DRAM

National Instruments

Option

— 0 —

256 K × 32 or

256 K × 36

1 M × 32 or

1M× 36

4 M × 32 or

4M× 36

© National Instruments Corporation 2-3 MXI-2 Configuration Reference Manual

1 MB —

4 MB YES

16 MB YES

Chapter 2 PCI-MXI-2 Configuration and Installation

Install the PCI-MXI-2

This section contains general installation instructions for the PCI-MXI-2.
Consult your computer user manual or technical reference manual for
specific instructions and warnings.

1. Plug in your PCI-based computer before installing the PCI-MXI-2.
The power cord grounds the computer and protects it from electrical
damage while you install the module.

Caution To protect both yourself and the computer from electrical hazards, leave the

computer off until you finish installing the PCI-MXI-2 module.

2. Remove the cover or access port to the PCI bus.

3. Select any available PCI expansion slot.

4. Locate the metal bracket that covers the cut-out in the back panel of
the chassis for the slot you have selected. Remove and save the
bracket-retaining screw and the bracket cover.

5. Touch the metal part of the power supply case inside the computer to
discharge any static electricity that might be on your clothes or body.

6. Line up the PCI-MXI-2 with the MXI-2 connector near the cut-out on
the back panel. Slowly push down on the top of the PCI-MXI-2 until
its card-edge connector rests on the expansion slot receptacle. Using
slow, evenly distributed pressure, press the PCI-MXI-2 straight down
until it seats in the expansion slot.

7. Reinstall the bracket-retaining screw to secure the PCI-MXI-2 to the
back panel rail.

8. Check the installation.

9. Replace the computer cover.

MXI-2 Configuration Reference Manual 2-4 ni.com

Chapter 2 PCI-MXI-2 Configuration and Installation

Figure 2-2 shows how to install the PCI-MXI-2.

3

1

2

1 PCI-MXI-2 Board 2 PCI Bus Slot 3PC

Figure 2-2. Installing the PCI-MXI-2 in a Computer

© National Instruments Corporation 2-5 MXI-2 Configuration Reference Manual

PCI-MXI-2 Universal
Configuration and Installation

This chapter contains the instructions to configure and install the
PCI-MXI-2 Universal module. This chapter applies only if your kit
contains a PCI-MXI-2 Universal. If you ordered a kit containing a
PCI-MXI-2, refer to Chapter 2, PCI-MXI-2 Configuration and Installation.
If you ordered a kit containing a PXI-8320, refer to Chapter 4, PXI-8320

Configuration and Installation.

Caution Electrostatic discharge can damage several components on your PCI-MXI-2

Universal module. To avoid such damage in handling the module, touch the antistatic
plastic package to a metal part of your computer chassis before removing the PCI-MXI-2
Universal from the package.

Configure the PCI-MXI-2 Universal

This section describes how to configure the following options on the
PCI-MXI-2 Universal:

• Configuration EEPROM

• Onboard DRAM

3

Figure 3-1 shows the location and factory-default settings on the
PCI-MXI-2 Universal module.

© National Instruments Corporation 3-1 MXI-2 Configuration Reference Manual

Chapter 3 PCI-MXI-2 Universal Configuration and Installation

2

1

1SW1 2 DRAM

Figure 3-1. PCI-MXI-2 Universal Parts Locator Diagram

MXI-2 Configuration Reference Manual 3-2 ni.com

Configuration EEPROM

The PCI-MXI-2 Universal has an onboard EEPROM, which stores default
register values that are loaded at power-on. The EEPROM is divided into
two halves—a factory-configuration half and a user-configuration half—so
you can modify the user-configurable half while the factory-configured
half stores a back-up of the default user settings. The factory configuration
is a minimal configuration that you can use to boot your PCI-MXI-2
Universal regardless of the changes made to the user configuration. For
information about configuring the onboard EEPROM, refer to Appendix B,

EEPROM Configuration.

Onboard DRAM

The PCI-MXI-2 Universal can accommodate one 72-pin DRAM
SODIMM. Table 3-1 lists the SODIMM types you can use. The
PCI-MXI-2 Universal can hold up to 16 MB of onboard memory.
The PCI-MXI-2 Universal supports DRAM speeds of 80 ns or faster.

Chapter 3 PCI-MXI-2 Universal Configuration and Installation

Table 3-1. PCI-MXI-2 Universal DRAM Configurations

SIMMs Total DRAM

National Instruments

Option

— 0 —

1 M × 32 4 MB YES

4 M × 32 16 MB YES

Install the PCI-MXI-2 Universal

This section contains general installation instructions for the PCI-MXI-2
Universal. Consult your computer user manual or technical reference
manual for specific instructions and warnings.

1. Plug in your PCI-based computer before installing the PCI-MXI-2
Universal. The power cord grounds the computer and protects it from
electrical damage while you install the module.

Caution To protect both yourself and the computer from electrical hazards, leave the

computer off until you finish installing the PCI-MXI-2 Universal module.

2. Remove the cover or access port to the PCI bus.

3. Select any available PCI expansion slot.

© National Instruments Corporation 3-3 MXI-2 Configuration Reference Manual

Chapter 3 PCI-MXI-2 Universal Configuration and Installation

4. Locate the metal bracket that covers the cut-out in the back panel of
the chassis for the slot you have selected. Remove and save the
bracket-retaining screw and the bracket cover.

5. Touch the metal part of the power supply case inside the computer to
discharge any static electricity that might be on your clothes or body.

6. Line up the PCI-MXI-2 Universal with the MXI-2 connector near
the cut-out on the back panel. Slowly push down on the top of the
PCI-MXI-2 Universal until its card-edge connector rests on the
expansion slot receptacle. Using slow, evenly distributed pressure,
press the PCI-MXI-2 Universal straight down until it seats in the
expansion slot.

7. Reinstall the bracket-retaining screw to secure the PCI-MXI-2
Universal to the back panel rail.

8. Check the installation.

9. Replace the computer cover.

Figure 3-2 shows how to install the PCI-MXI-2 Universal.

3

1

2

1 PCI-MXI-2 Universal Board 2 PCI Bus Slot 3PC

Figure 3-2. Installing the PCI-MXI-2 Universal in a Computer

MXI-2 Configuration Reference Manual 3-4 ni.com

PXI-8320 Configuration
and Installation

This chapter contains the instructions to configure and install the PXI-8320
module. This chapter applies only if your kit contains a PXI-8320. If you
ordered a kit containing a PCI-MXI-2 or PCI-MXI-2 Universal, refer to
Chapter 2, PCI-MXI-2 Configuration and Installation, or Chapter 3,

PCI-MXI-2 Universal Configuration and Installation.

Caution Electrostatic discharge can damage several components on your PXI-8320

module. To avoid such damage in handling the module, touch the antistatic plastic package
to a metal part of your chassis before removing the PXI-8320 from the package.

Configure the PXI-8320

This section describes how to configure the following options on the
PXI-8320:

• Configuration EEPROM

• Onboard DRAM

4

Figure 4-1 shows the location and factory-default settings on the PXI-8320
module.

© National Instruments Corporation 4-1 MXI-2 Configuration Reference Manual

Chapter 4 PXI-8320 Configuration and Installation

1

1 DRAM 2U6

Figure 4-1. PXI-8320 Parts Locator Diagram

2

Configuration EEPROM

The PXI-8320 has an onboard EEPROM, which stores default register
values that are loaded at power-on. The EEPROM is divided into two
halves—a factory-configuration half and a user-configuration half—so you
can modify the user-configurable half while the factory-configured half
stores a back-up of the default user settings. The factory configuration is a
minimal configuration you can use to boot your PXI-8320 regardless of the
changes made to the user configuration. For information about configuring
the onboard EEPROM, refer to Appendix B, EEPROM Configuration.

Onboard DRAM

The PXI-8320 can accommodate one DRAM SODIMM. Table 4-1 lists the
SODIMMs you can use. The PXI-8320 can hold up to 16 MB of onboard
memory. The PXI-8320 supports DRAM speeds of 80 ns or faster.

MXI-2 Configuration Reference Manual 4-2 ni.com

SODIMMs Total DRAM

1 M × 32 4 MB YES

4 M × 32 16 MB YES

Install the PXI-8320

This section contains general installation instructions for the PXI-8320.
Consult your chassis user manual or the PXI-8320 User Manual for
specific instructions and warnings.

1. Plug in your PXI or CompactPCI chassis before installing the
PXI-8320. The power cord grounds the chassis and protects it from
electrical damage while you install the module.

Caution To protect both yourself and the chassis from electrical hazards, leave the chassis

off until you finish installing the PXI-8320 module.

Chapter 4 PXI-8320 Configuration and Installation

Table 4-1. PXI-8320 DRAM Configurations

National Instruments

Option

— 0 —

2. Select any available PXI or CompactPCI peripheral slot. Do not use
the first slot, which is designated for the system controller, such as the
National Instruments PXI-8170 Series embedded computer. Refer to
Figure 4-2.

3. Locate the metal bracket that covers the chassis slot you have selected.
Remove and save the cover.

4. Touch the metal part of the case to discharge any static electricity that
might be on your clothes or body.

5. Make sure the injector/ejector handle is in its downward position.
Align the PXI-8320 with the card guides on the slot of the
PXI/CompactPCI peripheral slot.

Caution Do not raise the injector/ejector handle as you insert the PXI-8320. The module

will not insert properly unless the handle is in its downward position so that it does not
interfere with the injector rail on the chassis.

6. Slide the board into the chassis until the handle catches on the
injector/ejector rail.

© National Instruments Corporation 4-3 MXI-2 Configuration Reference Manual

Chapter 4 PXI-8320 Configuration and Installation

7. Raise the injector/ejector handle until the module firmly seats into the
backplane.

8. Screw in the bracket-retaining screw at the top of the module to secure
the PXI-8320 to the chassis.

9. Check the installation.

Figure 4-2 shows how to install the PXI-8320. The National Instruments
PXI-8170 Series is shown installed in the system controller slot of the PXI
chassis. Place the PXI-8320 and any other PXI boards in any other slot.

4

3

2

1

1 Ejector Handle
2 PXI Board

3 PXI-8170 Series Controller
4 PXI-1000B Chassis

Figure 4-2. Installing the PXI-8320 in a PXI Chassis

MXI-2 Configuration Reference Manual 4-4 ni.com

VXI-MXI-2 Configuration
and Installation

This chapter contains the instructions to configure and install the
VXI-MXI-2 module. This chapter applies only if your kit contains a C-size
VXI-MXI-2. If you have a B-size VXI-MXI-2, refer to Chapter 6,

VXI-MXI-2/B Configuration and Installation. If you ordered the VME kit,

skip this chapter and refer to Chapter 7, VME-MXI-2 Configuration

and Installation.

Configuring the VXI-MXI-2 is optional. A typical configuration can use
the default settings.

Caution Electrostatic discharge can damage several components on your VXI-MXI-2

module. To avoid such damage in handling the module, touch the antistatic plastic package
to a metal part of your VXI chassis before removing the VXI-MXI-2 from the package.

Configure the VXI-MXI-2

5

This section describes how to configure the following options on the
VXI-MXI-2:

• VXIbus logical address

• VXIbus Slot 0/Non-Slot 0

• VXIbus CLK10 routing

• Trigger input termination

• MXIbus termination

• Configuration EEPROM

• Onboard DRAM

• VXIbus local bus

Figure 5-1 shows the right-side cover of the VXI-MXI-2. The drawing
shows the location and factory-default settings of the configuration
switches and jumpers on the module. Notice that you can access switch S6
(called out as number 8 in the drawing) only by removing the front cover.

© National Instruments Corporation 5-1 MXI-2 Configuration Reference Manual

Chapter 5 VXI-MXI-2 Configuration and Installation

Nonslot 0

Auto

2

1

Slot 0

W2

No

Yes

1

No
Yes
Yes

432

U35

Terminate MXIbus

Yes
No
No

Automatic MXIbus Termination
Change Factory Configuration
Restore Factory Configuration

3 4 5

S8

S9

W3

CLK10

Source

From MXIbus

From onboard oscillator

From SMB (S3 must be set to "IN")

YesNo

VXI-MXI to left

VXI-MXI to right

g

utin

XI CLK10

o

R

M

Turn off power to instruments and cables

before installing or removing any modules.

WARNING:

SWITCH

Address 1

setting of Logical

Shown at default

LOGICAL ADDRESS

Receive CLK10 from MXIbus

S7

Drive CLK10 out MXIbus

87

654

U43

3
21

Push up for logic 1

Push down for logic 0

6

7

8

(All switches and jumpers shown in default position)

VXI-MXI-2

9

INVERTED
NON-INVERTED

SMB CLK10 Output Polarity (Effective only when S3 is set to "OUT")

50 Termination for SMB CLK10 (Effective only when S3 is set to "IN")

On

SMB CLK10 Direction

In

50 Termination for External Trigger Input

On

10

S5

S4 Off

S3

Out

11

S2 Off

12

1U35
2W2

3W3
4S8

5S9
6S7

7U43
8S6

9S5
10 S4

11 S3
12 S2

Figure 5-1. VXI-MXI-2 Right-Side Cover

MXI-2 Configuration Reference Manual 5-2 ni.com

Front Panel Features

The VXI-MXI-2 has the following front panel features:

• Three front panel LEDs

– SYSFAIL LED indicates that the VMEbus SYSFAIL line is

asserted.

– MXI LED indicates when the VXI-MXI-2 is accessed from the

MXIbus.

– VXI LED indicates when the VXI-MXI-2 is accessed from the

VXIbus.

• MXIbus connector

• Three SMB connectors

– External clock

– Trigger output

– Trigger input

• System reset pushbutton

Removing the Metal Enclosure

The VXI-MXI-2 is housed in a metal enclosure to improve EMC
performance and to provide easy handling. Because the enclosure includes
cutouts to facilitate changes to the switch and jumper settings, you do not
need to remove it under normal circumstances.

Chapter 5 VXI-MXI-2 Configuration and Installation

However, you must remove the enclosure if you want to change the amount
of DRAM installed on the VXI-MXI-2. Switch S6, which is directly related
to the amount of DRAM you want to install, is also accessible only by
removing the enclosure. To change the amount of onboard DRAM, remove
the four screws on the top, the four screws on the bottom, and the five
screws on the right-side cover of the enclosure. Refer to the Onboard

DRAM section for details about changing DRAM.

VXIbus Logical Address

Each device in a VXIbus/MXIbus system is assigned a unique number
between 0 and 254. This 8-bit number, called the logical address, defines
the base address for the VXI configuration registers located on the device.
With unique logical addresses, each VXIbus device in the system is
assigned 64 bytes of configuration space in the upper 16 KB of A16 space.

© National Instruments Corporation 5-3 MXI-2 Configuration Reference Manual

Chapter 5 VXI-MXI-2 Configuration and Installation

Logical address 0 is reserved for the Resource Manager in the VXIbus
system. Because the VXI-MXI-2 cannot act as a Resource Manager, do not
configure the VXI-MXI-2 with a logical address of 0.

Some VXIbus devices have dynamically configurable logical addresses.
These devices have an initial logical address of hex FF or 255, which
indicates that they can be dynamically configured. While the VXI-MXI-2
does support dynamic configuration of VXI devices within its chassis, it is
itself a statically configured device and is preset at the factory with a VXI
logical address of 1.

Ensure that no other statically configurable VXIbus devices have a logical
address of 1. If they do, change the logical address setting of either the
VXI-MXI-2 or the other device so that every device in the system has a
unique associated logical address.

You can change the logical address of the VXI-MXI-2 by changing the
setting of the 8-bit DIP switch labeled LOGICAL ADDRESS SWITCH
(location designator U43) on the panel. The down position of the DIP
switch corresponds to a logic value of 0 and the up position corresponds
to a logic value of 1. Verify that the VXI-MXI-2 does not have the same
logical address as any other statically configured VXIbus device in your
system. Remember that logical addresses hex 0 and FF are not allowed for
the VXI-MXI-2. Also, when setting logical addresses, keep in mind the
grouping requirements set by the system hierarchy. Refer to VXI-6, VXIbus
Mainframe Extender Specification, for more information on setting logical
addresses on a multichassis hierarchy.

Figure 5-2 shows switch settings for logical addresses hex 1 and C0.

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Chapter 5 VXI-MXI-2 Configuration and Installation

LOGICAL ADDRESS

SWITCH
Shown at default
setting of Logical

Address 1

Push up for logic 1

Push down for logic 0

12345678

a. Switch Set to Logical Address 1 (Default)

LOGICAL ADDRESS

SWITCH
Shown at default
setting of Logical

Address 1

Push up for logic 1

Push down for logic 0

12345678

U43

U43

b. Switch Set to Logical Address Hex C0

Figure 5-2. Logical Address Selection

VXIbus Slot 0/Non-Slot 0

The VXI-MXI-2 is configured at the factory to detect if it is installed in
Slot 0 of a VXIbus chassis automatically. With automatic Slot 0 detection,
you can install the VXI-MXI-2 into any VXIbus slot.

You can manually configure the VXI-MXI-2 for either Slot 0 or Non-Slot 0
operation by defeating the automatic-detection circuitry. Use the
three-position jumper W2 to select automatic Slot 0 detection, Slot 0,
or Non-Slot 0 operation. Figure 5-3 shows these three settings.

Caution Do not install a device configured for Slot 0 into another slot without first

reconfiguring it to either Non-Slot 0 or automatic configuration. Neglecting to do this
could damage the device, the VXIbus backplane, or both.

© National Instruments Corporation 5-5 MXI-2 Configuration Reference Manual

Chapter 5 VXI-MXI-2 Configuration and Installation

Slot 0

Auto

Nonslot 0

a. Automatic Slot 0 Detection (Default)

W2

Slot 0

Auto

Nonslot 0

b. Manual Slot 0 Configuration

W2

Slot 0

Auto

Nonslot 0

When the VXI-MXI-2 is installed in Slot 0, it becomes the VMEbus
System Controller. In this role, it has VMEbus Data Transfer Bus Arbiter
circuitry that accepts bus requests on all four VMEbus request levels,
prioritizes the requests, and grants the bus to the highest-priority requester.
As VMEbus System Controller, the VXI-MXI-2 also drives the 16 MHz
VMEbus system clock using an onboard 16 MHz oscillator.

As required by the VXIbus specification, the VXI-MXI-2 drives the
10 MHz signal CLK10 on a differential ECL output when installed in
Slot 0. When not installed in Slot 0, the VXI-MXI-2 only receives the
CLK10 signal.

VXIbus CLK10 Routing

When you install it in Slot 0 of your chassis, the VXI-MXI-2 supplies the
VXIbus CLK10 signal. The VXI-MXI-2 can use three different sources
to generate this signal: an onboard oscillator, the external CLK SMB
connector, and the MXIbus CLK10 signal. Use the three-position
jumper W3 to select these options, as shown in Figure 5-4.

c. Manual Non-Slot 0 Configuration

Figure 5-3. VXIbus Slot Configuration

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Chapter 5 VXI-MXI-2 Configuration and Installation

In

S3 Out

From onboard oscillator

From SMB (S3 must be set to "IN")

From MXIbus

a. CLK10 Generated from Onboard Oscillator (Default)

From onboard oscillator

From SMB (S3 must be set to "IN")SMB CLK10 Direction

From MXIbus

b. CLK10 Generated from SMB

From onboard oscillator

From SMB (S3 must be set to "IN")

From MXIbusReceive CLK10 from MXIbus

W3

W3

W3

S7

c. CLK10 Generated from MXIbus

Figure 5-4. VXIbus CLK10 Routing

Notice that Figure 5-4b and Figure 5-4c also show switches S3 and S7,
respectively. You must configure these switches as shown when using the
corresponding CLK10 source setting of W3.

You can also configure the VXI-MXI-2 to drive the external CLK SMB
signal from the VXIbus CLK10 signal. Switch S3 controls whether the
VXI-MXI-2 drives or receives the external CLK SMB signal. If you change
the S3 setting to drive CLK10 out the external CLK10 SMB connector, do
not set the W3 jumper to receive the SMB CLK10 signal; instead, use the
settings shown in either Figure 5-4a or Figure 5-4c as appropriate.

© National Instruments Corporation 5-7 MXI-2 Configuration Reference Manual

Chapter 5 VXI-MXI-2 Configuration and Installation

When switch S3 is set so that the VXI-MXI-2 receives the SMB CLK10
signal, you have the option to add a 50 Ω termination to the signal by setting
switch S4. S4 is unused—its setting does not matter—when S3 is
configured to drive the external CLK SMB signal.

You can use an additional switch, S5, to control the polarity of the
external CLK SMB signal when S3 is configured to drive it. S5 is
unused—its setting does not matter—when S3 is configured to receive
the external CLK SMB signal.

Figure 5-5 shows four configuration settings for the VXI-MXI-2.
Figure 5-5a shows the default configuration, which is for driving the
inverted external CLK SMB. Use the settings of Figure 5-5b to drive the
non-inverted external CLK SMB signal. Figure 5-5c illustrates the setting
for receiving the external CLK SMB signal. Finally, you can configure the
switches as shown in Figure 5-5d to receive the external CLK SMB signal
with a 50 Ω termination.

Note The settings of any switches shown with this pattern ( ) have no bearing on the

configuration described in any of the following figures.

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Chapter 5 VXI-MXI-2 Configuration and Installation

S2 Off

S3 Out

S4 Off

S5

S2 Off

S3 Out

S4 Off

S5

S2 Off

S3 Out

S4 Off

S5

On 50 Ω Termination for External Trigger Input

In

SMB CLK10 Direction

50 Ω Termination for SMB CLK10 (Effective only when S3 is set to "IN")

On

SMB CLK10 Output Polarity (Effective only when S3 is set to "OUT")

NON-INVERTED
INVERTED

a. Drive Inverted External CLK SMB (Default)

On 50 Ω Termination for External Trigger Input

In

SMB CLK10 Direction

50 Ω Termination for SMB CLK10 (Effective only when S3 is set to "IN")

On

SMB CLK10 Output Polarity (Effective only when S3 is set to "OUT")

NON-INVERTED
INVERTED

b. Drive Non-Inverted External CLK SMB

On 50 Ω Termination for External Trigger Input

In

SMB CLK10 Direction

50 Ω Termination for SMB CLK10 (Effective only when S3 is set to "IN")

On

SMB CLK10 Output Polarity (Effective only when S3 is set to "OUT")

NON-INVERTED
INVERTED

c. Receive External CLK SMB

S2 Off

S3 Out

S4 Off

S5

On 50 Ω Termination for External Trigger Input

In

SMB CLK10 Direction

50 Ω Termination for SMB CLK10 (Effective only when S3 is set to "IN")

On

SMB CLK10 Output Polarity (Effective only when S3 is set to "OUT")

NON-INVERTED
INVERTED

d. Receive External CLK SMB with 50 Ω Termination

Figure 5-5. SMB CLK10 Settings

© National Instruments Corporation 5-9 MXI-2 Configuration Reference Manual

Chapter 5 VXI-MXI-2 Configuration and Installation

The VXI-MXI-2 can also drive or receive the MXIbus CLK10 signal.
Switch S7 controls whether the VXI-MXI-2 drives MXIbus CLK10 from
the VXIbus CLK10 or receives MXIbus CLK10. As shown in Figure 5-4c,
if W3 is configured to use the MXIbus CLK10 to generate the VXIbus
CLK10 signal, switch S7 must be configured to receive MXIbus CLK10.
This is shown again in Figure 5-6a. If you change the S7 setting to drive
CLK10 out the MXIbus, do not set the W3 jumper to receive the MXIbus
CLK10; instead, use the settings shown in Figure 5-4a or Figure 5-4b as
appropriate.

Caution Do not configure more than one MXIbus device to drive the MXIbus CLK10.

Having a second device driving MXIbus CLK10 could damage the device.

Figure 5-6 shows the configuration settings for receiving and driving
MXIbus CLK10, respectively.

Drive CLK10 out MXIbus

S7

Receive CLK10 from MXIbus

a. Receive CLK10 from MXIbus (Default) b. Drive MXIbus CLK10 from VXIbus CLK10

Figure 5-6. Receiving or Driving MXIbus CLK10

S7

Drive CLK10 out MXIbus

Receive CLK10 from MXIbus

Trigger Input Termination

You can use switch S2 to terminate the external trigger input SMB with
50 Ω. Figure 5-7a shows the default setting for a nonterminated trigger
input SMB. Use the setting of Figure 5-7b to terminate the trigger input
SMB. Switch S2 is above switches S3, S4, and S5, which have no effect on
this configuration.

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Chapter 5 VXI-MXI-2 Configuration and Installation

S2 Off

S3 Out

S4 Off

S5

S2 Off

S3 Out

S4 Off

S5

On 50 Ω Termination for External Trigger Input

In

SMB CLK10 Direction

50 Ω Termination for SMB CLK10 (Effective only when S3 is set to "IN")

On

SMB CLK10 Output Polarity (Effective only when S3 is set to "OUT")

NON-INVERTED
INVERTED

a. Non-Terminated External Trigger Input SMB (Default)

On 50 Ω Termination for External Trigger Input

In

SMB CLK10 Direction

50 Ω Termination for SMB CLK10 (Effective only when S3 is set to "IN")

On

SMB CLK10 Output Polarity (Effective only when S3 is set to "OUT")

NON-INVERTED
INVERTED

b. Terminated External Trigger Input SMB with 50 Ω

Figure 5-7. SMB Trigger Input Termination

MXIbus Termination

The first and last MXIbus devices connected to the MXIbus—whether
using a single MXI-2 cable or daisy-chained MXI-2 cables—must
terminate the MXIbus. Any MXIbus devices in the middle of a MXIbus
daisy chain must not terminate the MXIbus.

The VXI-MXI-2 automatically senses whether or not it is at either end of
the MXIbus cable to terminate the MXIbus. You can manually control
MXIbus termination by defeating the automatic circuitry. Use switches
1 and 2 of the four-position switch at location U35 to control whether
MXIbus termination is automatic (Figure 5-8a), on (Figure 5-8b), or off
(Figure 5-8c). The settings of switches 3 and 4 have no effect on MXIbus
termination.

© National Instruments Corporation 5-11 MXI-2 Configuration Reference Manual

Chapter 5 VXI-MXI-2 Configuration and Installation

Use switch 2 of U35 to select whether the VXI-MXI-2 automatically
controls termination of the MXIbus. Notice in Figure 5-8a that switch 1 has
no effect when switch 2 is set for automatic MXIbus termination. To control
termination manually, you must turn off switch 2. You can then use
switch 1 of U35 to manually control whether to terminate the MXIbus.

Restore Factory Configuration
Change Factory Configuration

Automatic MXIbus Termination

Restore Factory Configuration
Change Factory Configuration

Automatic MXIbus Termination

U35

No
No

Terminate MXIbus

a. Automatic MXIbus Termination (Default)

Terminate MXIbus

b. Terminate MXIbus (On)

Yes
Yes

U35

No

No
Yes
Yes

Yes
Yes
No

1234

No

Yes
Yes
No

1234

No

U35

Restore Factory Configuration
Change Factory Configuration

Automatic MXIbus Termination

Terminate MXIbus

c. Do Not Terminate MXIbus (Off)

No

No
Yes
Yes

Yes
Yes
No

1234

No

Figure 5-8. MXIbus Termination

Configuration EEPROM

The VXI-MXI-2 has an onboard EEPROM, which stores default register
values that are loaded at power-on. The EEPROM is divided into two
halves—a factory-configuration half and a user-configuration half—so you
can modify the user-configurable half while the factory-configured half
stores a backup of the default user settings.

Use switches 3 and 4 of the four-position switch at location U35 to control
the operation of the EEPROM. The Restore Factory Configuration switch
(switch 4) causes the VXI-MXI-2 to boot from the factory-configured half

MXI-2 Configuration Reference Manual 5-12 ni.com

Chapter 5 VXI-MXI-2 Configuration and Installation

instead of the user-modified settings. This is useful in the event that the
user-configured half of the EEPROM becomes corrupted in such a way that
the VXI-MXI-2 boots to an unusable state.

The Change Factory Configuration switch (switch 3 of U35) lets you
change the factory-default configuration settings by permitting writes to the
factory settings section of the EEPROM. This switch serves as a safety
measure and is not needed under normal circumstances. When this switch
is off (its default setting), the factory configuration of the EEPROM is
protected, so any writes to the factory area are ignored. The factory area
is protected regardless of the setting of switch 4 of U35.

Figure 5-9 shows the configuration settings for EEPROM operation. The
settings of switches 1 and 2 have no effect on EEPROM configuration.

© National Instruments Corporation 5-13 MXI-2 Configuration Reference Manual

Chapter 5 VXI-MXI-2 Configuration and Installation

Restore Factory Configuration
Change Factory Configuration

Automatic MXIbus Termination

Terminate MXIbus

a. Boot from User Configuration (Factory Configuration Protected) (Default)

Restore Factory Configuration
Change Factory Configuration

Automatic MXIbus Termination

Terminate MXIbus

b. Boot from Factory Configuration (Factory Configuration Protected)

Restore Factory Configuration
Change Factory Configuration

Automatic MXIbus Termination

Terminate MXIbus

No

No
Yes
Yes

Yes
Yes

No

No
Yes
Yes

No
No

U35

U35

U35

Yes
Yes
No

1234

No

Yes
Yes
No

1234

No

Yes
Yes
No

1234

No

c. Boot from User Configuration (Factory Configuration Unprotected)

U35

Restore Factory Configuration
Change Factory Configuration

Automatic MXIbus Termination

Terminate MXIbus

d. Boot from Factory Configuration (Factory Configuration Unprotected)

No

No
Yes
Yes

Yes
Yes
No

1234

No

Figure 5-9. EEPROM Operation

Onboard DRAM

The VXI-MXI-2 can accommodate up to two 1.35 in. 72-pin DRAM
SIMMs. You must remove the metal enclosure to access the SIMM sockets
and a switch that selects the SIMM size. To access these components,
remove the four screws on the top, the four screws on the bottom, and the
five screws on the right-side cover of the metal enclosure.

MXI-2 Configuration Reference Manual 5-14 ni.com

Chapter 5 VXI-MXI-2 Configuration and Installation

Table 5-1 lists the SIMM types you can use. You can use 32- or 36-bit
SIMMs because DRAM parity is not required. Because the VXI-MXI-2
supports only one organization at a time, all SIMMs installed must be of the
same type. Use Bank 0 first when installing the SIMMs, and use Bank 1
when you need to install a second, matching SIMM. As shown in Table 5-1,
you can install up to 64 MB. The VXI-MXI-2 supports DRAM speeds of
80 ns or faster.

Use switch S6 to select the size of each SIMM. If the SIMMs are 4 M × 32
or larger, set S6 to the OFF setting as shown in Figure 5-10a. For SIMMs
smaller than 4 M × 32, use the ON setting as shown in Figure 5-10b.

SIMM SIZE

( = 4M × 32

AND LARGER)

S6

Figure 5-10. SIMM Size Configuration

SIMM SIZE

( = 4M × 32

AND LARGER)

b. Smaller than 4 M × 32a. 4 M × 32 and Larger

Refer to Table 5-1 for how to adjust the switch (ON or OFF) for all
supported DRAM configurations. Many of the DRAM options are
available from National Instruments.

Note After installing DRAM on the VXI-MXI-2, you need to enable the memory through

Measurement and Automation Explorer (MAX).

Table 5-1. VXI-MXI-2 DRAM Configurations

National

Instruments

Bank 0 Bank 1 Total DRAM

Option

— — 0 — —

256 K × 32 or

— 1 MB — ON

256 K × 36

S6

Switch Setting

of S6

256 K × 32 or

256 K × 36

512 K × 32 or

256 K × 32 or

2 MB — ON

256 K × 36

— 2 MB — ON

512 K × 36

© National Instruments Corporation 5-15 MXI-2 Configuration Reference Manual

Chapter 5 VXI-MXI-2 Configuration and Installation

Table 5-1. VXI-MXI-2 DRAM Configurations (Continued)

Bank 0 Bank 1 Total DRAM

National

Instruments

Option

Switch Setting

of S6

512 K × 32 or

512 K × 36

1 M × 32 or

1 M × 36

1 M × 32 or

1 M × 36

2 M × 32 or

2 M × 36

2 M × 32 or

2 M × 36

4 M × 32 or

4 M × 36

4 M × 32 or

4 M × 36

8 M × 32 or

8 M × 36

8 M × 32 or

8 M × 36

Caution If you install DRAM into the VXI-MXI-2, do not attempt to use the first 4 KB of

memory space. This 4 KB space maps to the registers on the VXI-MXI-2 and does not
access onboard DRAM. Accessing this region will cause your VXI-MXI-2 to behave
incorrectly.

512 K × 32 or

4 MB — ON

512 K × 36

— 4 MB YES ON

1 M × 32 or

8 MB — ON

1 M × 36

— 8 MB YES ON

2 M × 32 or

16 MB — ON

2 M × 36

— 16 MB YES OFF

4 M × 32 or

32 MB — OFF

4 M × 36

— 32 MB YES OFF

8 M × 32 or

64 MB YES OFF

8 M × 36

VXIbus Local Bus

If you are installing more than one VXI-MXI-2 in a single VXIbus chassis,
you must configure the boards to use the local bus. The VXI-MXI-2 uses
the local bus to pass a signal to the other VXI-MXI-2 modules in the chassis
to disable the VMEbus bus timeout unit (BTO) during cycles that map to
the MXIbus. Because the local bus is used, you must install all VXI-MXI-2
modules for a single chassis in adjacent slots.

MXI-2 Configuration Reference Manual 5-16 ni.com

Chapter 5 VXI-MXI-2 Configuration and Installation

Switches S8 and S9 on the VXI-MXI-2 select its position in relation to
any other VXI-MXI-2 module in the chassis. Use switch S9 when there is
a VXI-MXI-2 to the right (higher-numbered slot). Use S8 when there is a
VXI-MXI-2 to the left (lower-numbered slot).

Figure 5-11 shows four configuration settings for a VXI-MXI-2.
Figure 5-11a illustrates the default setting, which is for a single
VXI-MXI-2 in a chassis. Use the setting in Figure 5-11b for the
VXI-MXI-2 located to the left of all others. Figure 5-11c shows the setting
to use if the VXI-MXI-2 is between two others. Use the setting of
Figure 5-11d for the VXI-MXI-2 located to the right of all others.

VXI-MXI to left

No Yes

VXI-MXI to right

a. Single VXI-MXI-2 in Mainframe (Default)

No Yes

VXI-MXI to left

VXI-MXI to right

c.VXI-MXI-2 between Two Others

Install the VXI-MXI-2

S8

S9

VXI-MXI to left

VXI-MXI to right

b. Leftmost VXI-MXI-2 in Mainframe

S8

S9

VXI-MXI to left

VXI-MXI to right

d. Rightmost VXI-MXI-2 in Mainframe

Figure 5-11. VXIbus Local Bus Configuration

S8

S9

No Yes

S8

S9

No Yes

This section contains general installation instructions for the VXI-MXI-2.
Consult your VXIbus chassis user manual or technical reference manual for
specific instructions and warnings.

1. Plug in your chassis before installing the VXI-MXI-2. The power cord
grounds the chassis and protects it from electrical damage while you
install the module.

© National Instruments Corporation 5-17 MXI-2 Configuration Reference Manual

Chapter 5 VXI-MXI-2 Configuration and Installation

Caution To protect both yourself and the chassis from electrical hazards, leave the chassis

power off until you finish installing the VXI-MXI-2 module.

2. Remove or open any doors or covers blocking access to the chassis
slots.

3. If you are installing the VXI-MXI-2 into a D-size chassis, install a
support designed for installing C-size boards in D-size chassis. The
VXI-MXI-2 has no P3 connector and cannot provide P3 Slot 0 control
to VXI devices requiring this capability.

Caution If the VXI-MXI-2 is not configured for automatic Slot 0 detection, be certain that

the slot you select in your VXIbus chassis matches the VXI-MXI-2 configuration as either
a Slot 0 device or a Non-Slot 0 device. If you install your VXI-MXI-2 into a slot that does
not correspond with the jumper setting, you risk damage to the VXI-MXI-2, the VXIbus
backplane, or both.

4. Insert the VXI-MXI-2 in the slot you have selected by aligning the top
and bottom of the board with the card-edge guides inside the chassis.
Slowly push the VXI-MXI-2 straight into the slot until its plug
connectors rest on the backplane receptacle connectors. Using slow,
evenly distributed pressure, press the VXI-MXI-2 straight in until it
seats in the expansion slot. The front panel of the VXI-MXI-2 should
be even with the front panel of the chassis.

5. Tighten the retaining screws on the top and bottom edges of the front
panel.

6. Check the installation.

7. Connect the cables as described in the following section before
restoring power.

8. Replace or close any doors or covers to the chassis.

Connect the MXIbus Cable

There are two basic types of MXI-2 cables. MXI-2 cables can have either
a single connector on each end or a single connector on one end and a
double connector on the other end.

Connect the labeled end of the cable to the MXI-2 device that will be the
MXIbus System Controller. Connect the other end of the cable to the other
device. Be sure to tighten the screw locks to ensure proper pin connection.

MXI-2 Configuration Reference Manual 5-18 ni.com

Chapter 5 VXI-MXI-2 Configuration and Installation

Figure 5-12 shows the correct cabling for a VXI system containing a
PCI-MXI-2 board in a PCI-based computer cabled to a VXI-MXI-2 module
residing in Slot 0 of a VXIbus chassis. The cabling scheme is the same for
a PXI-8320 board installed in a PXI/CompactPCI chassis. Notice that you
can expand your system to include other devices by using an additional
MXI-2 cable. However, in such a case the first cable must have a double
connector on one end. You can use a cable with a single connector on each
end to connect the last device on the MXIbus.

4

N

A

I

T

N

I

S

O

T

N

R

A

UM

L

E

N

T

S

®

b
u

3

2

s

5

6

1

7

1 To External Computer
2 PCI-MXI-2 or PCI-MXI-2

Universal Interface Module

3MXI-2 Cable
4 VXI Chassis
5 VXI-MXI-2 Slot 0 Module

6 Additional MXI-2 Cable

(Ordered Separately)

7 To Other Chassis

Figure 5-12. MXI-2 Cable Configuration Using a PCI-MXI-2 and a VXI-MXI-2

When you have properly connected the MXI-2 cable, power on the VXIbus
chassis and then the computer.

Note Always turn on the chassis first. Doing so makes it possible for your external

computer to access the VXI boards in the chassis upon startup.

© National Instruments Corporation 5-19 MXI-2 Configuration Reference Manual

VXI-MXI-2/B Configuration
and Installation

This chapter contains the instructions to configure and install the
VXI-MXI-2/B module. This chapter applies only if your kit contains a
B-size VXI-MXI-2. If you have a C-size VXI-MXI-2, refer to Chapter 5,

VXI-MXI-2 Configuration and Installation. If you have a VME-MXI-2,

refer to Chapter 7, VME-MXI-2 Configuration and Installation.

Configuring the VXI-MXI-2/B is optional. A typical configuration can use
the default settings.

Caution Electrostatic discharge can damage several components on your VXI-MXI-2/B

module. To avoid such damage in handling the module, touch the antistatic plastic package
to a metal part of your VXI chassis before removing the VXI-MXI-2/B from the package.

Configure the VXI-MXI-2/B

6

This section describes how to configure the following options on the
VXI-MXI-2/B:

• VXIbus logical address

• VXIbus Slot 0/Non-Slot 0

• VXIbus CLK10 routing

• Trigger input termination

• MXIbus termination

• Configuration EEPROM

• Onboard DRAM

• VXIbus local bus

© National Instruments Corporation 6-1 MXI-2 Configuration Reference Manual

Chapter 6 VXI-MXI-2/B Configuration and Installation

Figure 6-1 shows the location and factory-default settings of the
configuration switches and jumpers on the VXI-MXI-2/B.

5

6

7

8

1S7
2S6

4

3

2

1

3S5
4S3

5S2
6W

111212

7W1
8U21

9W2
10 S1

Figure 6-1. VXI-MXI-2/B Parts Locator Diagram

9

10

11 U20
12 DRAM

MXI-2 Configuration Reference Manual 6-2 ni.com

Front Panel Features

The VXI-MXI-2/B has the following front panel features:

• Three front panel LEDs

– SYSFAIL LED indicates that the VMEbus SYSFAIL line is

– MXI LED indicates when the VXI-MXI-2/B is accessed from the

– VXI LED indicates when the VXI-MXI-2/B is accessed from the

• MXIbus connector

• Three SMB connectors

– Trigger input

– Trigger output

– External clock

• System reset pushbutton

VXIbus Logical Address

Each device in a VXIbus/MXIbus system is assigned a unique number
between 0 and 254. This 8-bit number, called the logical address, defines
the base address for the VXI configuration registers located on the device.
With unique logical addresses, each VXIbus device in the system is
assigned 64 bytes of configuration space in the upper 16 KB of A16 space.

Chapter 6 VXI-MXI-2/B Configuration and Installation

asserted.

MXIbus.

VXIbus.

Logical address 0 is reserved for the Resource Manager in the VXIbus
system. Because the VXI-MXI-2/B cannot act as a Resource Manager,
do not configure the VXI-MXI-2/B with a logical address of 0.

Some VXIbus devices have dynamically configurable logical addresses.
These devices have an initial logical address of hex FF or 255, which
indicates that they can be dynamically configured. While the
VXI-MXI-2/B does support dynamic configuration of VXI devices within
its chassis, it is itself a statically configured device and is preset at the
factory with a VXI logical address of 1.

Ensure that no other statically configurable VXIbus devices have a logical
address of 1. If they do, change the logical address setting of either the
VXI-MXI-2/B or the other device so that every device in the system has a
unique associated logical address.

© National Instruments Corporation 6-3 MXI-2 Configuration Reference Manual

Chapter 6 VXI-MXI-2/B Configuration and Installation

You can change the logical address of the VXI-MXI-2/B by changing
the setting of the 8-bit DIP switch at location designator U20 (refer to
Figure 6-1). The ON position of the DIP switch corresponds to a logic
value of 0, and the OFF position corresponds to a logic value of 1. Verify
that the VXI-MXI-2/B does not have the same logical address as any other
statically configured VXIbus device in your system. Remember that logical
addresses hex 0 and FF are not allowed for the VXI-MXI-2/B. Also, when
setting logical addresses, keep in mind the grouping requirements set by the
system hierarchy. Refer to VXI-6, VXIbus Mainframe Extender
Specification, for more information on setting logical addresses on a
multichassis hierarchy.

Figure 6-2 shows switch settings for logical addresses hex 1 and C0.

12345678

U20

a. Switch Set to Logical Address 1 (Default)

12345678

U20

b. Switch Set to Logical Address Hex C0

Figure 6-2. Logical Address Selection

VXIbus Slot 0/Non-Slot 0

The VXI-MXI-2/B is configured at the factory to automatically detect if it
is installed in Slot 0 of a VXIbus chassis. With automatic Slot 0 detection,
you can install the VXI-MXI-2/B into any VXIbus slot.

You can manually configure the VXI-MXI-2/B for either Slot 0 or
Non-Slot 0 operation by defeating the automatic-detection circuitry. Use
the three-position jumper W3 to select automatic Slot 0 detection, Slot 0,
or Non-Slot 0 operation. Figure 6-3 shows these three settings.

MXI-2 Configuration Reference Manual 6-4 ni.com

Chapter 6 VXI-MXI-2/B Configuration and Installation

Caution Do not install a device configured for Slot 0 into another slot without first

reconfiguring it to either Non-Slot 0 or automatic configuration. Neglecting to do this
could result in damage to the device, the VXIbus backplane, or both.

Non
Slot 0

Auto

Slot 0

W3

a. Automatic Slot 0 Detection (Default)

Non
Slot 0

Auto

Slot 0

W3

b. Manual Slot 0 Configuration

Non
Slot 0

Auto

Slot 0

W3

c. Manual Non-Slot 0 Configuration

Figure 6-3. VXIbus Slot Configuration

When the VXI-MXI-2/B is installed in Slot 0, it becomes the VMEbus
System Controller. In this role, it has VMEbus Data Transfer Bus Arbiter
circuitry that accepts bus requests on all four VMEbus request levels,
prioritizes the requests, and grants the bus to the highest priority requester.
As VMEbus System Controller, the VXI-MXI-2/B also drives the 16 MHz
VMEbus system clock using an onboard 16 MHz oscillator.

As required by the VXIbus specification, the VXI-MXI-2/B drives the
10 MHz signal CLK10 on a differential ECL output when installed in
Slot 0. When not installed in Slot 0, the VXI-MXI-2/B receives only the
CLK10 signal.

© National Instruments Corporation 6-5 MXI-2 Configuration Reference Manual

Chapter 6 VXI-MXI-2/B Configuration and Installation

VXIbus CLK10 Routing

When you install the VXI-MXI-2/B in Slot 0 of your chassis, it supplies the
VXIbus CLK10 signal. The VXI-MXI-2/B can use three different sources
to generate this signal: the onboard oscillator, the external CLK SMB
connector, and the MXIbus CLK10 signal. Use the three-position jumper
W1 to select these options, as shown in Figure 6-4.

Notice that Figures 6-4b and 6-4c also show switches S7 and S1,
respectively. You must configure these switches as shown when using the
corresponding CLK10 source setting of W1.

a. CLK10 Generated from Onboard Oscillator (Default)

W1

ON BRD

SMB

MXI

W1

( = OUT)

CLK10 DIR

S7

b. CLK10 Generated from SMB

S1MBCLK10

IN OUT

c. CLK10 Generated from MXIbus

ON BRD

SMB

MXI

W1

ON BRD

SMB

MXI

Figure 6-4. VXIbus CLK10 Routing

You can also configure the VXI-MXI-2/B to drive the external CLK SMB
signal from the VXIbus CLK10 signal. Switch S7 controls whether the
VXI-MXI-2/B drives or receives the external CLK SMB signal. If you
change the S7 setting to drive CLK10 out the external CLK10 SMB
connector, do not set the W1 jumper to receive the SMB CLK10 signal.
Instead, use the settings shown in either Figure 6-4a or Figure 6-4c as
appropriate.

MXI-2 Configuration Reference Manual 6-6 ni.com

Chapter 6 VXI-MXI-2/B Configuration and Installation

When you set switch S7 so that the VXI-MXI-2/B receives the SMB
CLK10 signal, you have the option to add a 50 Ω termination to the signal
by setting switch S6. S6 is unused—its setting does not matter—when S7
is configured to drive the external CLK SMB signal.

You can use an additional switch, S3, to control the polarity of the external
CLK SMB signal when S7 is configured to drive it. S3 is unused—its
setting does not matter—when S7 is configured to receive the external
CLK SMB signal.

Figure 6-5 shows four configuration settings for the VXI-MXI-2/B.
Figure 6-5a shows the default configuration, which is for driving the
inverted external CLK SMB. Use the settings of Figure 6-5b to drive the
noninverted external CLK SMB signal. Figure 6-5c illustrates the setting
for receiving the external CLK SMB signal. Finally, you can configure the
switches as shown in Figure 6-5d to receive the external CLK SMB signal
with a 50 Ω termination.

Note The settings of any switches shown with this pattern ( ) have no bearing on the

configuration described in any of the following figures.

© National Instruments Corporation 6-7 MXI-2 Configuration Reference Manual

Chapter 6 VXI-MXI-2/B Configuration and Installation

( = OUT) ( = NO) ( = NO)

CLK10 DIR

TERM CLK10 TERM TRIGIN

S5 S3

S7

S6

CLK10 POL

( = INVERT)

a. Drive Inverted External CLK SMB (Default)

( = OUT) ( = NO) ( = NO)

CLK10 DIR

S7

TERM CLK10 TERM TRIGIN

S6

CLK10 POL

( = INVERT)

b. Drive Non-Inverted External CLK SMB

( = OUT) ( = NO) ( = NO)

CLK10 DIR

S7

TERM CLK10 TERM TRIGIN

S6

CLK10 POL

( = INVERT)

c. Receive External CLK SMB

( = OUT) ( = NO) ( = NO)

CLK10 DIR

TERM CLK10 TERM TRIGIN

S5 S3

S5 S3

S5 S3

S7

S6

CLK10 POL

( = INVERT)

d. Receive External CLK SMB with 50 Ω Termination

Figure 6-5. SMB CLK10 Settings

The VXI-MXI-2/B also can drive or receive the MXIbus CLK10 signal.
Switch S1 controls whether the VXI-MXI-2/B drives MXIbus CLK10 from
the VXIbus CLK10 or receives MXIbus CLK10. As shown in Figure 6-4c,
if W1 is configured to use the MXIbus CLK10 to generate the VXIbus
CLK10 signal, switch S1 must be configured to receive MXIbus CLK10.
This is shown again in Figure 6-6a.

MXI-2 Configuration Reference Manual 6-8 ni.com

Chapter 6 VXI-MXI-2/B Configuration and Installation

If you change the S1 setting to drive CLK10 out the MXIbus, do not set the
W1 jumper setting to receive the MXIbus CLK10. Instead, use the settings
shown in Figure 6-4a or 6-4b as appropriate.

Caution Do not configure more than one MXIbus device to drive the MXIbus CLK10.

Having a second device driving MXIbus CLK10 could damage the device.

Figure 6-6 shows the configuration settings for receiving and driving
MXIbus CLK10, respectively.

Trigger Input Termination

You can use switch S5 to terminate the external trigger input SMB with
50 Ω. Figure 6-7a shows the default setting for a nonterminated trigger
input SMB. Use the setting of Figure 6-7b to terminate the trigger
input SMB.

a. Non-Terminated External Trigger

MBCLK10

IN OUT

a. Receive CLK10 from

MXIbus (Default)

S1

b. Drive MXIbus CLK10 from

Figure 6-6. Receiving or Driving MXIbus CLK10

( = NO) ( = NO)

TERM TRIGIN

Input SMB (Default)

S5

b. Terminated External Trigger

Figure 6-7. SMB Trigger Input Termination

MBCLK10

IN OUT

VXIbus CLK10

Input SMB with 50 Ω

S1

TERM TRIGIN

S5

MXIbus Termination

The first and last MXIbus devices connected to the MXIbus—whether
using a single MXI-2 cable or daisy-chained MXI-2 cables—must
terminate the MXIbus. Any MXIbus devices in the middle of a MXIbus
daisy chain must not terminate the MXIbus.

The VXI-MXI-2/B automatically senses whether it is at either end of the
MXIbus cable to terminate the MXIbus. You can manually control MXIbus
termination by defeating the automatic circuitry. Use switches 3 and 4 of

© National Instruments Corporation 6-9 MXI-2 Configuration Reference Manual

Chapter 6 VXI-MXI-2/B Configuration and Installation

the four-position switch at location U21 to control whether MXIbus
termination is automatic (Figure 6-8a), on (Figure 6-8b), or off
(Figure 6-8c). The settings of switches 1 and 2 have no effect on MXIbus
termination.

Use switch 3 to select whether the VXI-MXI-2/B automatically controls
termination of the MXIbus. Notice in Figure 6-8a that switch 4 has no
effect when switch 3 is set for automatic MXIbus termination.

If you want to control termination manually, you must turn off switch 3.
You can then use switch 4 to manually control whether to terminate the
MXIbus.

1324

U21

OFF

a. Automatic MXIbus Termination (Default)

1324

U21

OFF

b. Terminate MXIbus (On)

1324

U21

OFF

c. Do Not Terminate MXIbus (Off)

Figure 6-8. MXIbus Termination

MXI-2 Configuration Reference Manual 6-10 ni.com

Configuration EEPROM

The VXI-MXI-2/B has an onboard EEPROM, which stores default register
values that are loaded at power-on. The EEPROM is divided into two
halves—a factory-configuration half and a user-configuration half—so you
can modify the user-configurable half while the factory-configured half
stores a back-up of the factory settings.

Use switches 1 and 2 of the four-position switch at location U21 to control
the operation of the EEPROM. The Restore Factory Configuration switch
(switch 1) causes the VXI-MXI-2/B to boot from the factory-configured
half instead of the user-modified settings. This is useful in the event that the
user-configured half of the EEPROM becomes corrupted in such a way that
the VXI-MXI-2/B boots to an unusable state.

The Change Factory Configuration switch (switch 2) lets you change the
factory-default configuration settings by permitting writes to the factory
settings section of the EEPROM. This switch serves as a safety measure
and is not needed under normal circumstances. When this switch is off
(its default setting), the factory configuration of the EEPROM is protected,
so any writes to the factory area are ignored. The factory area is protected
regardless of the setting of switch 1.

Chapter 6 VXI-MXI-2/B Configuration and Installation

Figure 6-9 shows the configuration settings for EEPROM operation.
The settings of switches 3 and 4 have no effect on EEPROM configuration.

© National Instruments Corporation 6-11 MXI-2 Configuration Reference Manual

Chapter 6 VXI-MXI-2/B Configuration and Installation

a. Boot from User Configuration (Factory Configuration Protected) (Default)

b. Boot from Factory Configuration (Factory Configuration Protected)

1234

U21

OFF

1234

U21

OFF

1234

U21

OFF

c. Boot from User Configuration (Factory Configuration Unprotected)

1234

U21

OFF

d. Boot from Factory Configuration (Factory Configuration Unprotected)

Figure 6-9. EEPROM Operation

Onboard DRAM

The VXI-MXI-2/B can accommodate up to two 1.35 in. 72-pin DRAM
SIMMs. Table 5-1 lists the SIMMs you can use. You can use 32- or 36-bit
SIMMs because DRAM parity is not required. Because the VXI-MXI-2/B
supports only one organization at a time, all SIMMs installed must be of the
same type. Use Bank 0 first when installing the SIMMs, and use Bank 1
when you need to install a second, matching SIMM. As shown in
Table 6-1, you can install up to 64 MB. The VXI-MXI-2/B supports
DRAM speeds of 80 ns or faster.

MXI-2 Configuration Reference Manual 6-12 ni.com

Chapter 6 VXI-MXI-2/B Configuration and Installation

Use switch S2 to select the size of each SIMM. If the SIMMs are 4 M × 32
or larger, set S2 to the OFF setting as shown in Figure 6-10a. For SIMMs
smaller than 4 M × 32, use the ON setting as shown in Figure 6-10b.

S2

a. 4 M × 32 and Larger b. Smaller than 4 M × 32

Figure 6-10. SIMM Size Configuration

S2

Refer to Table 6-1 for how to adjust the switch (ON or OFF) for all
supported DRAM configurations. Many of the DRAM options are
available from National Instruments.

Note After installing DRAM on the VXI-MXI-2/B, you need to enable the memory

through Measurement and Automation Explorer (MAX).

Table 6-1. VXI-MXI-2/B DRAM Configurations

National

Instruments

Bank 0 Bank 1 Total DRAM

Option

— — 0 — —

256 K × 32 or

— 1 MB — ON

256 K × 36

Switch Setting

of S6

256 K × 32 or

256 K × 36

512 K × 32 or

256 K × 32 or

2 MB — ON

256 K × 36

— 2 MB — ON

512 K × 36

512 K × 32 or

512 K × 36

1 M × 32 or

512 K × 32 or

4 MB — ON

512 K × 36

— 4 MB YES ON

1 M × 36

1 M × 32 or

1 M × 36

2 M × 32 or

1 M × 32 or

8 MB — ON

1 M × 36

— 8 MB YES ON

2 M × 36

© National Instruments Corporation 6-13 MXI-2 Configuration Reference Manual

Chapter 6 VXI-MXI-2/B Configuration and Installation

Table 6-1. VXI-MXI-2/B DRAM Configurations (Continued)

Bank 0 Bank 1 Total DRAM

National

Instruments

Option

Switch Setting

of S6

2 M × 32 or

2 M × 36

4 M × 32 or

4 M × 36

4 M × 32 or

4 M × 36

8 M × 32 or

8 M × 36

8 M × 32 or

8 M × 36

Caution If you install DRAM into the VXI-MXI-2/B, do not attempt to use the first 4 KB

of memory space. This 4 KB space maps to the registers on the VXI-MXI-2/B and does
not access onboard DRAM. Accessing this region will cause your VXI-MXI-2/B to behave
incorrectly.

VXIbus Local Bus

2 M × 32 or

16 MB — ON

2 M × 36

— 16 MB YES OFF

4 M × 32 or

32 MB — OFF

4 M × 36

— 32 MB YES OFF

8 M × 32 or

64 MB YES OFF

8 M × 36

If you install more than one VXI-MXI-2/B in a single VXIbus chassis, you
must configure the boards to use the local bus. The VXI-MXI-2/B uses the
local bus to pass a signal to the other VXI-MXI-2 modules in the chassis to
disable the VMEbus bus timeout unit (BTO) during cycles that map to the
MXIbus. Because the local bus is used, you must install all VXI-MXI-2/B
modules for a single chassis in adjacent slots.

Use the jumper block at W2 to select the module’s position in relation to
any other VXI-MXI-2/B module in the chassis.

Figure 6-11 shows four configuration settings for a VXI-MXI-2/B.
Figure 6-11a illustrates the default setting, which is for a single
VXI-MXI-2/B in a chassis. Use the setting in Figure 6-11b for the
VXI-MXI-2/B located to the left of all others (lowest-numbered slot).

Figure 6-11c shows the setting to use if the VXI-MXI-2/B is between two
others. Use the setting of Figure 6-11d for the VXI-MXI-2/B located to the
right of all others (highest-numbered slot).

MXI-2 Configuration Reference Manual 6-14 ni.com

Chapter 6 VXI-MXI-2/B Configuration and Installation

W2

A5

C5

C30

NC

a. Single VXI-MXI-2/B in Mainframe (Default)

W2

A5

C5

C30

NC

c. VXI-MXI-2/B Between Two Others

Install the VXI-MXI-2/B

This section contains general installation instructions for the
VXI-MXI-2/B. Consult the user manual or technical reference manual
of your VXIbus chassis for specific instructions and warnings.

W2

A5

C5

C30

NC

b. Leftmost VXI-MXI-2/B in Mainframe

W2

A5

C5

C30

NC

d. Rightmost VXI-MXI-2/B in Mainframe

Figure 6-11. VXIbus Local Bus Configuration

Note If you install the VXI-MXI-2/B in a VME chassis, ensure that no other devices drive

the VMEbus user-defined pins—rows A and C of P2/J2.

1. Plug in your chassis before installing the VXI-MXI-2/B. The power
cord grounds the chassis and protects it from electrical damage while
you install the module.

Caution To protect both yourself and the chassis from electrical hazards, leave the chassis

power off until you finish installing the VXI-MXI-2/B module.

2. Remove or open any doors or covers blocking access to the chassis
slots.

© National Instruments Corporation 6-15 MXI-2 Configuration Reference Manual

Chapter 6 VXI-MXI-2/B Configuration and Installation

Caution If the VXI-MXI-2/B is not configured for automatic Slot 0 detection, be certain

that the slot you select in your VXIbus chassis matches the VXI-MXI-2/B configuration as
either a Slot 0 device or a Non-Slot 0 device. If you install your VXI-MXI-2/B into a slot
that does not correspond with the jumper setting, you risk damage to the VXI-MXI-2/B,
the VXIbus backplane, or both.

3. Insert the VXI-MXI-2/B in the slot you have selected by aligning
the top and bottom of the board with the card-edge guides inside the
chassis. Slowly push the VXI-MXI-2/B straight into the slot until its
plug connectors rest on the backplane receptacle connectors. Using
slow, evenly distributed pressure, press the VXI-MXI-2/B straight in
until it seats in the expansion slot. The front panel of the VXI-MXI-2/B
should be even with the front panel of the chassis.

4. Tighten the retaining screws on the top and bottom edges of the front
panel.

5. Check the installation.

6. Connect the cables as described in the following section before
restoring power.

7. Replace or close any doors or covers to the chassis.

Connect the MXIbus Cable

There are two basic types of MXI-2 cables. MXI-2 cables can have either
a single connector on each end or a single connector on one end and a
double connector on the other end.

Connect the labeled end of the cable to the MXI-2 device that will be the
MXIbus System Controller. Connect the other end of the cable to the other
device. Be sure to tighten the screw locks to ensure proper pin connection.

Figure 6-12 shows the correct cabling for a VXI system containing a
PCI-MXI-2 board in a PCI-based computer cabled to a VXI-MXI-2/B
module residing in Slot 0 of a VXIbus chassis. The cabling scheme is the
same for a PXI-8320 board installed in a PXI/CompactPCI chassis. Notice
that you can expand your system to include other devices by using an
additional MXI-2 cable. However, in such a case the first cable must have
a double connector on one end. You can use a cable with a single connector
on each end to connect the last device on the MXIbus.

MXI-2 Configuration Reference Manual 6-16 ni.com

Chapter 6 VXI-MXI-2/B Configuration and Installation

4

3

2

5

6

1

7

1 To External Computer
2 PCI-MXI-2 or PXI-MXI-2 Universal

Interface Module
3MXI-2 Cable
4 VXI Chassis

5 VXI-MXI-2/B Slot 0 Module
6 Additional MXI-2 Cable

(Ordered Separately)

7 To Other Chassis

Figure 6-12. MXI-2 Cable Configuration Using a PCI-MXI-2 and a VXI-MXI-2/B

When you have properly connected the MXI-2 cable, power on the VXIbus
chassis and then the computer.

Note Always power on the chassis first. Doing so makes it possible for your external

computer to access the VXI boards in the chassis upon startup.

© National Instruments Corporation 6-17 MXI-2 Configuration Reference Manual

VME-MXI-2 Configuration
and Installation

This chapter contains the instructions to configure and install the
VME-MXI-2 module. This chapter applies only if your kit contains a
VME-MXI-2. If you ordered the VXI kit, you should refer to Chapter 5,

VXI-MXI-2 Configuration and Installation, or Chapter 6, VXI-MXI-2/B
Configuration and Installation.

Configuring the VME-MXI-2 is optional. A typical configuration can use
the default settings.

Caution Electrostatic discharge can damage several components on your VME-MXI-2

module. To avoid such damage in handling the module, touch the antistatic plastic package
to a metal part of your VMEbus chassis before removing the VME-MXI-2 from the
package.

Configure the VME-MXI-2

7

This section describes how to configure the following options on the
VME-MXI-2:

• VMEbus A16 base address

• MXIbus termination

• Configuration EEPROM

• Onboard DRAM

• VME-MXI-2 intermodule signaling

The VME-MXI-2 automatically detects if it is located in the first slot of the
chassis to perform the VMEbus System Controller functions. It is not
necessary to configure the VMEbus System Controller option. You can
install the module in any slot of a VMEbus chassis.

© National Instruments Corporation 7-1 MXI-2 Configuration Reference Manual

Chapter 7 VME-MXI-2 Configuration and Installation

Figure 7-1 shows the location and factory-default settings of the
configuration switches and jumpers on the VME-MXI-2 module.

1

2

3

1S2
2U21

6

3W2
4U20

5

4

5 DRAM Bank 1
6 DRAM Bank 0

Figure 7-1. VME-MXI-2 Parts Locator Diagram

MXI-2 Configuration Reference Manual 7-2 ni.com

Front Panel Features

The VME-MXI-2 has the following front panel features:

• Three front panel LEDs

– SYSFAIL LED indicates that the VMEbus SYSFAIL line is

– MXI LED indicates when the VME-MXI-2 is accessed from the

– VME LED indicates when the VME-MXI-2 is accessed from the

• MXIbus connector

• System reset pushbutton

VMEbus A16 Base Address

The VME-MXI-2 requires 64 B (bytes) of A16 space for its configuration
registers. It uses the logical address scheme of the VXIbus specification, in
which each device is assigned an 8-bit value called the logical address. This
logical address allocates 64 B of space to the device within the upper
quarter of A16 space. The VME-MXI-2 cannot be configured to locate its
registers in the lower three quarters of A16 space. The A16 base address of
the VME-MXI-2 is address lines 15 and 14 high with address lines 13
through 6 matching the logical address of the VME-MXI-2, and address
lines 5 through 0 low. In other words, the A16 base address of the
VME-MXI-2 module’s 64 B register set is as calculated below:

Chapter 7 VME-MXI-2 Configuration and Installation

asserted.

MXIbus.

VMEbus.

base address = C000 hex + (logical address) × 40 hex

The factory-default logical address for the VME-MXI-2 is 1, which locates
the registers in the range C040 hex to C07F hex. You can change the logical
address of the VME-MXI-2 by changing the setting of the 8-bit DIP switch
at location designator U20. The ON position of the DIP switch corresponds
to a logic value of 0, and the OFF position corresponds to a logic value of 1.
Allowable logical addresses for the VME-MXI-2 range from 1 to 254
(hex FE).

Verify that no other devices in your system use the A16 address space for
the VME-MXI-2. If possible, configure all other VMEbus A16 devices to
be located within the lower three quarters of A16 space. Also, when setting
base addresses, keep in mind the grouping requirements set by the system
hierarchy. Refer to VXI-6, VXIbus Mainframe Extender Specification, for
more information on setting base addresses on a multichassis hierarchy.

© National Instruments Corporation 7-3 MXI-2 Configuration Reference Manual

Chapter 7 VME-MXI-2 Configuration and Installation

Figure 7-2 shows switch settings for A16 base address hex C040 and F000.

a. Switch Set to A16 Base Address hex C040 (Default)

MXIbus Termination

The first and last MXIbus devices connected to the MXIbus—whether
using a single MXI-2 cable or daisy-chained MXI-2 cables—must
terminate the MXIbus. Any MXIbus devices in the middle of a MXIbus
daisy chain must not terminate the MXIbus.

48263715

OFF

U20

48263715

OFF

U20

b. Switch Set to A16 Base Address Hex F000

Figure 7-2. Base Address Selection

The VME-MXI-2 automatically senses if it is at either end of the
MXIbus cable to terminate the MXIbus. You can manually control MXIbus
termination by defeating the automatic circuitry. Use switches 3 and 4
of the four-position switch at location U21 to control whether MXIbus
termination is automatic (Figure 7-3a), on (Figure 7-3b), or off
(Figure 7-3c). The settings of switches 1 and 2 have no effect on
MXIbus termination.

Use switch 3 to select whether you want the VME-MXI-2 to automatically
control termination of the MXIbus. Use switch 4 to manually control
whether to terminate the MXIbus when automatic termination is turned off.
Switch 4 has no effect when switch 3 is set for automatic MXIbus
termination; you must turn off automatic termination if you want to
manually control termination.

MXI-2 Configuration Reference Manual 7-4 ni.com

Chapter 7 VME-MXI-2 Configuration and Installation

1234

Configuration EEPROM

The VME-MXI-2 has an onboard EEPROM, which stores default register
values that are loaded at power-on. The EEPROM is divided into two
halves—a factory-configuration half and a user-configuration half—so you
can modify the user-configurable half while the factory-configured half
stores a backup of the default user settings.

OFF

a. Automatic MXIbus Termination (Default)

1234

OFF

b. Terminate MXIbus (On)

1234

OFF

c. Do Not Terminate MXIbus (Off)

U21

U21

U21

Figure 7-3. MXIbus Termination

Use switches 1 and 2 of the four-position switch at location U21 to control
the operation of the EEPROM. The Restore Factory Configuration switch
(switch 1) causes the VME-MXI-2 to boot from the factory-configured half
instead of the user-modified settings. This is useful in the event that the
user-configured half of the EEPROM becomes corrupted in such a way that
the VME-MXI-2 boots to an unusable state.

The Change Factory Configuration switch (switch 2 of U21) lets you
change the factory-default configuration settings by permitting writes to the
factory settings section of the EEPROM. This switch serves as a safety

© National Instruments Corporation 7-5 MXI-2 Configuration Reference Manual

Chapter 7 VME-MXI-2 Configuration and Installation

measure and is not needed under normal circumstances. When this switch
is off (its default setting), the factory configuration of the EEPROM is
protected so any writes to the factory area are ignored. The factory area
is protected regardless of the setting of switch 1 of U21.

Figure 7-4 shows the configuration settings for EEPROM operation. The
settings of switches 3 and 4 have no effect on EEPROM configuration.

1234

OFF

a. Boot from User Configuration (Factory Configuration Protected) (Default)

U21

1234

OFF

U21

b. Boot from Factory Configuration (Factory Configuration Protected)

1234

U21

OFF

c. Boot from User Configuration (Factory Configuration Unprotected)

1234

U21

OFF

d. Boot from Factory Configuration (Factory Configuration Unprotected)

Figure 7-4. EEPROM Operation

MXI-2 Configuration Reference Manual 7-6 ni.com

Onboard DRAM

Chapter 7 VME-MXI-2 Configuration and Installation

The VME-MXI-2 can accommodate up to two 1.35 in. 72-pin DRAM
SIMMs. Table 7-1 lists the SIMM types you can use. You can use 32- or
36-bit SIMMs because DRAM parity is not required. Because the
VME-MXI-2 supports only one organization at a time, all SIMMs installed
must be of the same type. Use Bank 0 first when installing the SIMMs, and
use Bank 1 when you need to install a second, matching SIMM. As shown
in Table 7-1, you can install up to 64 MB. The VME-MXI-2 supports
DRAM speeds of 80 ns or faster.

Use switch S2 to select the size of each SIMM. If the SIMMs are 4 M × 32
or larger, set S2 to the OFF setting as shown in Figure 7-5a. For SIMMs
smaller than 4 M × 32, use the ON setting as shown in Figure 7-5b.

S2

a. 4 M × 32 and Larger b. Smaller than 4 M × 32

Figure 7-5. SIMM Size Configuration

S2

Refer to Table 7-1 for how to adjust the switch (ON or OFF) for all
supported DRAM configurations. Many of the DRAM options are
available from National Instruments.

Note After installing DRAM on the VME-MXI-2, you need to enable the memory

through Measurement and Automation Explorer (MAX).

Table 7-1. VME-MXI-2 DRAM Configurations

National

Instruments

Bank 0 Bank 1 Total DRAM

Option

— — 0 — —

256 K × 32 or

— 1 MB — ON

256 K × 36

Switch Setting

of S6

256 K × 32 or

256 K × 36

© National Instruments Corporation 7-7 MXI-2 Configuration Reference Manual

256 K × 32 or

256 K × 36

2 MB — ON

Chapter 7 VME-MXI-2 Configuration and Installation

Table 7-1. VME-MXI-2 DRAM Configurations (Continued)

Bank 0 Bank 1 Total DRAM

National

Instruments

Option

Switch Setting

of S6

512 K × 32 or

512 K × 36

512 K × 32 or

512 K × 36

1 M × 32 or

1 M × 36

1 M × 32 or

1 M × 36

2 M × 32 or

2 M × 36

2 M × 32 or

2 M × 36

4 M × 32 or

4 M × 36

4 M × 32 or

4 M × 36

8 M × 32 or

8 M × 36

8 M × 32 or

8 M × 36

— 2 MB — ON

512 K × 32 or

4 MB — ON

512 K × 36

— 4 MB YES ON

1 M × 32 or

8 MB — ON

1 M × 36

— 8 MB YES ON

2 M × 32 or

16 MB — ON

2 M × 36

— 16 MB YES OFF

4 M × 32 or

32 MB — OFF

4 M × 36

— 32 MB YES OFF

8 M × 32 or

64 MB YES OFF

8 M × 36

Caution If you install DRAM into the VME-MXI-2, do not attempt to use the first 4 KB

of memory space. This 4 KB space maps to the registers on the VME-MXI-2 and does not
access onboard DRAM. Accessing this region will cause your VME-MXI-2 to behave
incorrectly.

VME-MXI-2 Intermodule Signaling

If you install more than one VME-MXI-2 in a single VMEbus chassis,
you must select a user-defined pin for use by the VME-MXI-2. The
VME-MXI-2 modules use this signal to disable the bus timeout unit(s) on
the other VME-MXI-2 modules during VMEbus accesses that map to the
MXIbus. This is done because the MXIbus bus timeout unit should be the

MXI-2 Configuration Reference Manual 7-8 ni.com

Chapter 7 VME-MXI-2 Configuration and Installation

sole timer of any MXIbus access. Because bus timeout units on other
VMEbus modules cannot monitor this signal, they should be permanently
disabled. If you cannot disable a module’s bus timeout unit, configure it to
the highest setting to give MXIbus accesses as much time as possible.

You can choose from three user-defined pins on J2/P2. The pin you select
must be bused on the VMEbus backplane between all slots that will have a
VME-MXI-2 installed. Use jumper W2 to select pin A5, C5, or C30 of
J2/P2, as shown in Figure 7-6.

The fourth position on the jumper is the factory-default setting, which does
not connect the VME-MXI-2 to any user-defined pin. Use this option only
if you are installing a single VME-MXI-2 in a chassis.

Figure 7-6 shows the four intermodule signaling settings.

W2

A5

C5

C30

NC

a. User-Defined Pin A5 Selected

W2

A5

C5

C30

NC

c. User-Defined Pin C30 Selected

Figure 7-6. VME-MXI-2 Intermodule Signaling Settings

W2

A5

C5

C30

NC

b. User-Defined Pin C5 Selected

W2

A5

C5

C30

NC

d. No User-Defined Pin Selected (Default)

© National Instruments Corporation 7-9 MXI-2 Configuration Reference Manual

Chapter 7 VME-MXI-2 Configuration and Installation

Install the VME-MXI-2

This section contains general installation instructions for the VME-MXI-2.
Consult your VMEbus chassis user manual or technical reference manual
for specific instructions and warnings.

1. Plug in your chassis before installing the VME-MXI-2. The power
cord grounds the chassis and protects it from electrical damage while
you are installing the module.

Caution To protect both yourself and the chassis from electrical hazards, leave the chassis

off until you finish installing the VME-MXI-2 module.

2. Remove or open any doors or covers blocking access to the chassis
slots.

3. Insert the VME-MXI-2 in the slot you have selected by aligning the top
and bottom of the board with the card-edge guides inside the chassis.
Slowly push the VME-MXI-2 straight into the slot until its plug
connectors rest on the backplane receptacle connectors. Using slow,
evenly distributed pressure, press the VME-MXI-2 straight in until it
seats in the expansion slot. The front panel of the VME-MXI-2 should
be even with the front panel of the chassis.

4. Tighten the retaining screws on the top and bottom edges of the front
panel.

5. Check the installation.

6. Connect the cables as described in the following section before
restoring power.

7. Replace or close any doors or covers to the chassis.

Connect the MXIbus Cable

There are two basic types of MXI-2 cables. MXI-2 cables can have either
a single connector on each end or a single connector on one end and a
double connector on the other end.

Connect the labeled end of the cable to the MXI-2 device that will be the
MXIbus System Controller. Connect the other end of the cable to the other
device. Be sure to tighten the screw locks to ensure proper pin connection.

Figure 7-7 shows the correct cabling for a VME system containing a
PCI-MXI-2 board in a PCI-based computer cabled to a VME-MXI-2
module residing in Slot 1 of a VMEbus chassis. The cabling scheme is the

MXI-2 Configuration Reference Manual 7-10 ni.com

Chapter 7 VME-MXI-2 Configuration and Installation

same for a PXI-8320 board installed in a PXI/CompactPCI chassis. Notice
that you can expand your system to include other devices by using an
additional MXI-2 cable. However, in such a case the first cable must have
a double connector on one end. You can use a cable with a single connector
on each end to connect the last device on the MXIbus.

4

3

2

5

6

1

7

1 To External Computer
2 PCI-MXI-2 or PCI-MXI-2 Universal

Interface Module
3MXI-2 Cable
4 VME Chassis

5 VME-MXI-2 Module
6 Additional MXI-2 Cable

(Ordered Separately)

7 To Other Chassis

Figure 7-7. MXI-2 Cable Configuration Using a PCI-MXI-2 and a VME-MXI-2

When you have properly connected the MXI-2 cable, power on the
VMEbus chassis and then the computer.

Note Always power on the chassis first. Doing so makes it possible for your external

computer to access the VME boards in the chassis upon startup.

© National Instruments Corporation 7-11 MXI-2 Configuration Reference Manual

Specifications

This appendix lists various module specifications of the PCI-MXI-2,
PCI-MXI-2 Universal, PXI-8320, VXI-MXI-2 (C-size and B-size), and
VME-MXI-2, such as physical dimensions and power requirements.

PCI-MXI-2

This section lists the specifications for the PCI-MXI-2 module.

MXIbus Capability Descriptions

• Master-mode A32, A24, and A16 addressing

• Master-mode block transfers and synchronous block transfers

• Slave-mode A32, A24, and A16 addressing

• Slave-mode block transfers and synchronous block transfers

• Master-mode D32, D16, and D08 data sizes

• Slave-mode D32, D16, and D08 data sizes

• Optional MXIbus System Controller

• Can be a fair MXIbus requester

• Can lock the MXIbus for indivisible transfers

• Can terminate the MXIbus

• MXIbus master retry support

• MXIbus slave retry support

• Interrupt handler for levels 7 to 1

• Interrupt requester for levels 7 to 1

• MXIbus D32, D16, D08(O) interrupt handler

• MXIbus D32, D16, D08(O) interrupter

• Release on Acknowledge or Register Access interrupter

• MXIbus bus timer (programmable limit)

• Automatic MXIbus System Controller detection

A

© National Instruments Corporation A-1 MXI-2 Configuration Reference Manual

Appendix A Specifications for PCI-MXI-2

PCI Functionality

PCI initiator (master) capability .............supported

PCI target (slave) capability ...................supported

Data path.................................................32 bits

Card voltage/type....................................5 V only; 32-bit half-size card

Parity generation/checking,

error reporting.........................................supported

Target decode speed ...............................medium (one clock)

Target fast-back-to-back capability ........supported

Resource locking ....................................supported as a master and slave

PCI interrupts..........................................interrupts passed on

Base address registers.............................BAR 0 dedicated to local registers

INTA# signal

BAR 1–3 size configurable from
256 B to 4 GB

Expansion ROM .....................................8 KB

PCI master performance

(ideal maximum).....................................132 Mbytes/s

(16 Dwords maximum)

PCI slave performance

(ideal maximum).....................................33 Mbytes/s (to local registers)

Environmental

Temperature............................................0 to 55 °C operating;

–40 to 85 °C storage

Relative humidity ...................................0 to 95% noncondensing,

operating; 0 to 95%
noncondensing, storage

EMI.........................................................FCC Class A verified

MXI-2 Configuration Reference Manual A-2 ni.com

Requirements

Physical

Electrical

Appendix A Specifications for PCI-MXI-2

Memory space ........................................ 32 KB minimum, programmable

Board dimensions...................................174.63 by 106.68 mm

(6.875 by 4.2 in.)

Connectors .............................................single fully implemented

MXI-2 connector

Slot requirements ................................... single PCI slot

MTBF..................................................... 157,172 hours

Weight.................................................... 0.18 Kg (0.4 lb) typical

(no DRAM installed)

+5 VDC source....................................... 2.2 A typical

3.5 A maximum

Performance

Peak MXI transfer rate........................... 33 Mbytes/s

Sustained MXI transfer rate ................... 23 Mbytes/s

© National Instruments Corporation A-3 MXI-2 Configuration Reference Manual

Appendix A Specifications for PCI-MXI-2 Universal

PCI-MXI-2 Universal

This section lists the specifications for the PCI-MXI-2 Universal module.

MXIbus Capability Descriptions

• Master-mode A32, A24, and A16 addressing

• Master-mode block transfers and synchronous block transfers

• Slave-mode A32, A24, and A16 addressing

• Slave-mode block transfers and synchronous block transfers

• Master-mode D32, D16, and D08 data sizes

• Slave-mode D32, D16, and D08 data sizes

• Optional MXIbus System Controller

• Can be a fair MXIbus requester

• Can lock the MXIbus for indivisible transfers

• Can terminate the MXIbus

• MXIbus master retry support

• MXIbus slave retry support

• Interrupt handler for levels 7 to 1

• Interrupt requester for levels 7 to 1

• MXIbus D32, D16, D08(O) interrupt handler

• MXIbus D32, D16, D08(O) interrupter

• Release on Acknowledge or Register Access interrupter

• MXIbus bus timer (programmable limit)

• Automatic MXIbus System Controller detection

PCI Functionality

PCI initiator (master) capability .............supported

PCI target (slave) capability ...................supported

Data path.................................................32 bits

Card voltage/type....................................3.3 or 5 V; 32-bit half-size card

Parity generation/checking

error reporting.........................................supported

MXI-2 Configuration Reference Manual A-4 ni.com

Environmental

Appendix A Specifications for PCI-MXI-2 Universal

Target decode speed............................... medium (one clock)

Target fast-back-to-back capability ....... supported

Resource locking.................................... supported as a master and slave

PCI interrupts ......................................... interrupts passed on

INTA# signal

Base address registers ............................BAR 0 dedicated to local registers

BAR 1–3 size configurable from
256 B to 4 GB

Expansion ROM.....................................8 KB

PCI master performance

(ideal maximum).................................... 132 Mbytes/s

(16 Dwords maximum)

PCI slave performance

(ideal maximum).................................... 33 Mbytes/s (to local registers)

Temperature ........................................... 0 to 55 °C operating;

–20 to 70 °C storage

Relative humidity................................... 10 to 90% noncondensing,

operating; 5 to 95%
noncondensing, storage

Requirements

Memory Space ....................................... 32 KB minimum, programmable

Physical

Board dimensions...................................174.63 by 106.68 mm

(6.875 by 4.2 in.)

Connectors .............................................single fully implemented

MXI-2 connector

Slot requirements ................................... single PCI slot

MTBF..................................................... contact factory

© National Instruments Corporation A-5 MXI-2 Configuration Reference Manual

Appendix A Specifications for PCI-MXI-2 Universal

Weight ....................................................0.18 Kg (0.4 lb) typical

Electrical

+3.3 VDC source ....................................50 mA typical

+5 VDC source .......................................2.2 A typical

Performance

Peak MXI transfer rate............................33 Mbytes/s

Sustained MXI transfer rate....................23 Mbytes/s

(no DRAM installed)

80 mA maximum

3.5 A maximum

MXI-2 Configuration Reference Manual A-6 ni.com

PXI-8320

This section lists the specifications for the PXI-8320 module.

MXIbus Capability Descriptions

• Master-mode A32, A24, and A16 addressing

• Master-mode block transfers and synchronous block transfers

• Slave-mode A32, A24, and A16 addressing

• Slave-mode block transfers and synchronous block transfers

• Master-mode D32, D16, and D08 data sizes

• Slave-mode D32, D16, and D08 data sizes

• Optional MXIbus System Controller

• Can be a fair MXIbus requester

• Can lock the MXIbus for indivisible transfers

• Can terminate the MXIbus

• MXIbus master retry support

• MXIbus slave retry support

• Interrupt handler for levels 7 to 1

• Interrupt requester for levels 7 to 1

• MXIbus D32, D16, D08(O) interrupt handler

• MXIbus D32, D16, D08(O) interrupter

• Release on Acknowledge or Register Access interrupter

• MXIbus bus timer (programmable limit)

• Automatic MXIbus System Controller detection

Appendix A Specifications for PXI-8320

PCI Functionality

PCI initiator (master) capability............. supported

PCI target (slave) capability................... supported

Data path ................................................ 32 bits

Card voltage/type ................................... 5 V only; 32-bit 3U-size card

Parity generation/checking

error reporting ........................................ supported

© National Instruments Corporation A-7 MXI-2 Configuration Reference Manual

Appendix A Specifications for PXI-8320

Target decode speed ...............................medium (one clock)

Target fast-back-to-back capability ........supported

Resource locking ....................................supported as a master and slave

PCI interrupts..........................................interrupts passed on

Base address registers.............................BAR 0 dedicated to local registers

Expansion ROM .....................................8 KB

PCI master performance

(ideal maximum).....................................132 Mbytes/s

PCI slave performance

(ideal maximum).....................................33 Mbytes/s (to local registers)

Environmental

Temperature............................................0 to 55 °C operating;

INTA# signal

BAR 1–3 size configurable from
256 B to 4 GB

(16 Dwords maximum)

–40 to 85 °C storage

Relative humidity ...................................0 to 95% noncondensing,

operating; 0 to 95%
noncondensing, storage

EMI.........................................................FCC Class A verified

Requirements

Memory space.........................................32 KB minimum, programmable

Physical

Board dimensions ...................................160 mm by 100 mm

(6.3 by 3.94 in.)

Connectors ..............................................single fully implemented

MXI-2 connector

MXI-2 Configuration Reference Manual A-8 ni.com

Electrical

Performance

Appendix A Specifications for PXI-8320

Slot requirements ................................... single CompactPCI/PXI

Peripheral Slot

MTBF..................................................... 290,596 hours

Weight.................................................... 0.18 Kg (0.4 lb) typical

(no DRAM installed)

+5 VDC source....................................... 2.2 A typical

3.5 A maximum

Peak MXI transfer rate........................... 33 Mbytes/s

Sustained MXI transfer rate ................... 23 Mbytes/s

© National Instruments Corporation A-9 MXI-2 Configuration Reference Manual

Appendix A Specifications for VXI-MXI-2

VXI-MXI-2

This sections lists the specifications for the VXI-MXI-2 module. These
specifications apply equally to the VXI-MXI-2/B unless otherwise noted.

MXIbus Capability Descriptions

• Master-mode A32, A24, and A16 addressing

• Master-mode block transfers and synchronous block transfers

• Slave-mode A32, A24, and A16 addressing

• Slave-mode block transfers and synchronous block transfers

• Master-mode D32, D16, and D08 data sizes

• Slave-mode D32, D16, and D08 data sizes

• Optional MXIbus System Controller

• Can be a fair MXIbus requester

• Can lock the MXIbus for indivisible transfers

• Can terminate the MXIbus

• MXIbus master retry support

• MXIbus slave retry support

• Interrupt handler for levels 7 to 1

• Interrupt requester for levels 7 to 1

• MXIbus D32, D16, D08(O) interrupt handler

• MXIbus D32, D16, D08(O) interrupter

• Release on Acknowledge or Register Access interrupter

• MXIbus bus timer (programmable limit)

• Automatic MXIbus System Controller detection

• Automatic MXIbus termination detection

MXI-2 Configuration Reference Manual A-10 ni.com

Appendix A Specifications for VXI-MXI-2

VMEbus Capability Codes

Capability Code Description

A32, A24, A16 (master) VMEbus master A32, A24, and A16 addressing

A32, A24, A16 (slave) VMEbus slave A32, A24, and A16 addressing

D32, D16, D08(EO) (master) VMEbus master D32, D16, and D08 data sizes

D32, D16, D08(EO) (slave) VMEbus slave D32, D16, and D08 data sizes

BLT, MBLT (master) VMEbus master block and D64 transfers

BLT, MBLT (slave) VMEbus slave block and D64 transfers

RMW (master) VMEbus master read/modify/write transfers

RMW (slave) VMEbus slave read/modify/write transfers

RETRY (master) VMEbus master retry support

RETRY (slave) VMEbus slave retry support

FSD First slot detector

SCON VMEbus System Controller

PRI, RRS Prioritized or Round Robin Select arbiter

ROR, FAIR Release on Request and FAIR bus requester

IH(7–1) Interrupt handler for levels 7 to 1

I(7–1) Interrupt requester for levels 7 to 1

D32, D16, D08(O) (Interrupt Handler) VMEbus D32, D16, D08(O) interrupt handler

D32, D16, D08(O) (Interrupter) VMEbus D32, D16, D08(O) interrupter

ROAK, RORA Release on Acknowledge or Register Access

interrupter

BTO(x) VMEbus bus timer (programmable limit)

Requirements

VXIbus configuration space................... 64 B

A24 or A32 space...................................16 KB minimum (programmable)

© National Instruments Corporation A-11 MXI-2 Configuration Reference Manual

Appendix A Specifications for VXI-MXI-2

Environmental

Temperature............................................0 to 55 °C operating;

Relative humidity ...................................0 to 95% noncondensing,

EMI.........................................................FCC Class A verified

Physical

C-Size VXI-MXI-2

Board dimensions ...................................fully enclosed, shielded VXI

Connectors ..............................................single fully implemented MXI-2

–40 to 85 °C storage

operating; 0 to 95%
noncondensing, storage

C-size board

233.35 by 340 mm
(9.187 by 13.386 in.)

bus connector and three SMB
connectors

Slot requirements....................................single VXI C-size slot

Compatibility ..........................................fully compatible with VXI

specification

VXI keying class ....................................class 1 TTL

MTBF .....................................................contact factory

Weight ....................................................1.027 Kg (2.26 lb) typical

(no DRAM installed)

B-Size VXI-MXI-2/B

Board dimensions ...................................VXI B-size board

233.35 by 160 mm
(9.187 by 6.2999 in.)

Connectors ..............................................single fully implemented MXI-2

bus connector and three SMB
connectors

Slot requirements....................................single VXI B-size slot

MXI-2 Configuration Reference Manual A-12 ni.com

Electrical

Performance

Appendix A Specifications for VXI-MXI-2

Compatibility ......................................... fully compatible with VXI

specification

VXI keying class....................................class 1 TTL

MTBF..................................................... contact factory

Weight.................................................... 0.36 Kg (0.79 lb) typical

(no DRAM installed)

+5 VDC source....................................... 2.5 A typical

3.5 A maximum

–5.2 VDC source.................................... 180 mA typical

225 mA maximum

–2 VDC source....................................... 80 mA typical

100 mA maximum

Peak VME transfer rate.......................... 33 Mbytes/s

Sustained VME transfer rate.................. 23 Mbytes/s

© National Instruments Corporation A-13 MXI-2 Configuration Reference Manual

Appendix A Specifications for VME-MXI-2

VME-MXI-2

This section lists the specifications for the VME-MXI-2 module.

MXIbus Capability Descriptions

• Master-mode A32, A24 and A16 addressing

• Master-mode block transfers and synchronous block transfers

• Slave-mode A32, A24, and A16 addressing

• Slave-mode block transfers and synchronous block transfers

• Master-mode D32, D16, and D08 data sizes

• Slave-mode D32, D16, and D08 data sizes

• Optional MXIbus System Controller

• Can be a fair MXIbus requester

• Can lock the MXIbus for indivisible transfers

• Can terminate the MXIbus

• MXIbus master retry support

• MXIbus slave retry support

• Interrupt handler for levels 7 to 1

• Interrupt requester for levels 7 to 1

• MXIbus D32, D16, D08(O) interrupt handler

• MXIbus D32, D16, D08(O) interrupter

• Release on Acknowledge or Register Access interrupter

• MXIbus bus timer (programmable limit)

• Automatic MXIbus System Controller detection

• Automatic MXIbus termination detection

MXI-2 Configuration Reference Manual A-14 ni.com

Appendix A Specifications for VME-MXI-2

VMEbus Capability Codes

Capability Code Description

A32, A24, A16 (master) VMEbus master A32, A24, and A16 addressing

A32, A24, A16 (slave) VMEbus slave A32, A24, and A16 addressing

D32, D16, D08(EO) (master) VMEbus master D32, D16, and D08 data sizes

D32, D16, D08(EO) (slave) VMEbus slave D32, D16, and D08 data sizes

BLT, MBLT (master) VMEbus master block and D64 transfers

BLT, MBLT (slave) VMEbus slave block and D64 transfers

RMW (master) VMEbus master read/modify/write transfers

RMW (slave) VMEbus slave read/modify/write transfers

RETRY (master) VMEbus master retry support

RETRY (slave) VMEbus slave retry support

FSD First slot detector

SCON VMEbus System Controller

PRI, RRS Prioritized or Round Robin Select arbiter

ROR, FAIR Release on Request and FAIR bus requester

IH(7–1) Interrupt handler for levels 7 to 1

I(7–1) Interrupt requester for levels 7 to 1

D32, D16, D08(O) (Interrupt Handler) VMEbus D32, D16, D08(O) interrupt handler

D32, D16, D08(O) (Interrupter) VMEbus D32, D16, D08(O) interrupter

ROAK, RORA Release on Acknowledge or Register Access

interrupter

BTO(x) VMEbus bus timer (programmable limit)

Requirements

A16 space............................................... 64 B

A24 or A32 space...................................16 KB minimum (programmable)

© National Instruments Corporation A-15 MXI-2 Configuration Reference Manual

Appendix A Specifications for VME-MXI-2

Environmental

Temperature............................................0 to 55 °C operating;

Relative humidity ...................................0 to 95% noncondensing,

EMI.........................................................FCC Class A verified

Physical

Board dimensions ...................................VMEbus double-height board

Connectors ..............................................single fully implemented MXI-2

Slot requirements....................................single VMEbus double-height

–40 to 85 °C storage

operating; 0 to 95%
noncondensing, storage

233.36 by 160 mm
(9.187 by 6.2999 in.)

bus connector

slot

Electrical

Performance

Compatibility ..........................................fully compatible with VMEbus

specification

MTBF .....................................................184,366 hours

Weight ....................................................0.33 Kg (0.73 lb) typical

(no DRAM installed)

+5 VDC source .......................................2.2 A typical

3.2 A maximum

Peak VME transfer rate ..........................33 Mbytes/s

Sustained VME transfer rate...................23 Mbytes/s

MXI-2 Configuration Reference Manual A-16 ni.com

EEPROM Configuration

This appendix describes how to control the operation of the PCI-MXI-2,
PCI-MXI-2 Universal, or PXI-8320 onboard EEPROM and how to fix an
invalid EEPROM setting.

The EEPROM stores default register values that are loaded at power-on.
The EEPROM is divided into two halves so that you can modify one half,
while the factory-configured half retains a backup of the default user
settings.

Controlling the EEPROM Operation

Use switch 1 (FOV) of the four-position switch (at location U17 on the
PCI-MXI-2, SW1 on the PCI-MXI-2 Universal, or U6 on the PXI-8320) to
control the operation of the EEPROM. Switch 1 determines whether the
PCI-MXI-2, PCI-MXI-2 Universal, or PXI-8320 boots from the
factory-configured half or the user-configurable half. In its default setting,
the PCI-MXI-2, PCI-MXI-2 Universal, or PXI-8320 boots from the
user-configurable half. This switch is useful in the event that the
configuration becomes corrupted in such a way that the PCI-MXI-2,
PCI-MXI-2 Universal, or PXI-8320 boots to an unusable state.

B

The TST switch (switch 2 of U17, U6, or SW1) lets you change the default
factory configuration settings by permitting writes to the factory settings
section of the EEPROM. This switch serves as a safety measure and is not
needed under normal circumstances. When this switch is off (its default
setting) the factory configuration of the EEPROM is protected so any
writes to the factory area are ignored. The factory area is protected
regardless of the setting of switch 1.

Figures B-1 and B-2 show the default settings for EEPROM operation.

Caution Do not alter the settings of switches 3 and 4. Leave these switches as shown

unless specifically directed by National Instruments.

© National Instruments Corporation B-1 MXI-2 Configuration Reference Manual

Appendix B EEPROM Configuration

FOV

TST

POS

CT

Figure B-1. Normal EEPROM Operation on the PCI-MXI-2 and PCI-MXI-2 Universal

FOV

TST

POS

CT

Figure B-2. Normal EEPROM Operation on the PXI-8320

U17 or SW1

1234

1234

Fixing an Invalid EEPROM Configuration

Certain EEPROM configurations can cause your PCI-based or
PXI/CompactPCI computer to lock up while in its boot process. Generally,
only the size and location of the memory windows can cause the
PCI-MXI-2, PCI-MXI-2 Universal, or PXI-8320 to lock up your system.
For example, many PCI-based or PXI/CompactPCI computers will not
boot if a board in the system requests more memory space than the
computer can allocate. If you encounter this situation, you should reduce
the size of the PCI-MXI-2, PCI-MXI-2 Universal, or PXI-8320 user
window.

ON

ON

U6

If this situation occurs after changing the configuration, complete the
following steps to reconfigure the PCI-MXI-2, PCI-MXI-2 Universal,
or PXI-8320.

1. Power off your computer or chassis.

Caution To protect both yourself and the chassis from electrical hazards, leave the

computer or chassis off while you change the settings on the PCI-MXI-2, PCI-MXI-2
Universal, or PXI-8320 module.

2. Remove the PCI-MXI-2, PCI-MXI-2 Universal, or PXI-8320 from
your PCI-based computer or PXI/CompactPCI chassis.

3. Change switch 1 (FOV) on U17 or U6 to the ON position as shown in
Figures B-3 or B-4 to restore the factory configuration.

MXI-2 Configuration Reference Manual B-2 ni.com

Appendix B EEPROM Configuration

FOV

TST

POS

CT

U17 or SW1

1234

ON

Figure B-3. Restoring the Factory Configuration on the PCI-MXI-2

or PCI-MXI-2 Universal

FOV

TST

POS

CT

1234

ON

U6

Figure B-4. Restoring the Factory Configuration on the PXI-8320

Note

If you must remove the PCI-MXI-2, PCI-MXI-2 Universal, or PXI-8320 module

to access switch 1, follow the installation instructions in Chapter 2, PCI-MXI-2

Configuration and Installation, Chapter 3, PCI-MXI-2 Universal Configuration
and Installation, or Chapter 4, PXI-8320 Configuration and Installation, to reinstall the

PCI-MXI-2, PCI-MXI-2 Universal, or PXI-8320 modules, respectively.

4. Replace the PCI-MXI-2, PCI-MXI-2 Universal, or PXI-8320.

5. Power on the PCI-based computer or PXI/CompactPCI chassis.
The computer should boot this time, because the factory-default
configuration is being used to initialize the module.

6. Run the configuration utility that came with your National Instruments
software to re-adjust the PCI-MXI-2, PCI-MXI-2 Universal, or
PXI-8320 configuration.

7. After saving the configuration, shut down the operating system and
turn off the computer or chassis.

8. Remove the PCI-MXI-2, PCI-MXI-2 Universal, or PXI-8320.

9. Change switch 1 (FOV) to the OFF position.

10. Replace the PCI-MXI-2, PCI-MXI-2 Universal, or PXI-8320.

11. Power on the computer or chassis. If it does not boot with this
configuration, repeat these steps, modifying your configuration until
the computer or chassis boots successfully.

© National Instruments Corporation B-3 MXI-2 Configuration Reference Manual

National Instruments
Software Choices

This section discusses the National Instruments software available for your
MXI-2 kit.

If you choose to program your VXI system using a standard language such
as C, C++, or BASIC, you should realize that standard programming
languages do not come with built-in VXI capability. Rather, VXI capability
is added through a VXI bus interface software library. This software
component is very important, because it affects the choice of VXI computer
hardware, operating system, programming language, and ADE or
application software package. Software is a major thrust for National
Instruments, relating to our involvement with both the VXI Consortium and
the VXIplug&play Systems Alliance.

NI-VXI/NI-VISA

If you ordered your MXI-2 hardware as part of a kit such as the
VXI-PCI8000, you also received the NI-VXI/NI-VISA bus interface
software. This software consists of interface-independent software
(NI-VISA) for certain platforms addressed by VXIplug&play standards,
as well as VXI-specific software (NI-VXI).

C

The NI-VXI/NI-VISA software includes a Resource Manager (Resman),
an interactive configuration and troubleshooting program, a comprehensive
library of software routines for VXI/VME programming, a logging utility
you can use for debugging, and graphical interactive control programs for
interacting with VISA. You can use this software to seamlessly program
multiple-mainframe configurations and have software compatibility across
a variety of controller platforms.

NI-VISA has a comprehensive library of software routines not only for
VXI/VME programming, but also for GPIB, GPIB-VXI, PXI, TCP/IP, and
Serial. You can use this software to program instruments connected via
different types of interfaces.

© National Instruments Corporation C-1 MXI-2 Configuration Reference Manual

Appendix C National Instruments Software Choices

Measurement & Automation Explorer (MAX) allows you to view your
entire T&M system and configure various components, whether they are
VXI, GPIB, PXI, DAQ, remote, or Serial devices. You can also add VME
devices to your system easily with MAX and view them on a screen display
along with the rest of your system.

MAX also features various options for running Resman. You can still
execute Resman independently to configure your instruments after a power
cycle. But you can also perform resource manager operations directly from
MAX or configure it to run Resman automatically at startup.

The NI Spy utility tracks the calls your application makes to National
Instruments T&M drivers, including NI-VXI, NI-VISA, and NI-488.2.
NI Spy helps you debug your application by clearly highlighting the
functions that return errors. You can let NI Spy keep a log of your
program’s calls to these drivers so that you can check them for errors
at your convenience.

The bulk of this manual describes how to use hardware jumpers and
switches to configure your MXI-2 boards. However, you can handle a
substantial portion of your configuration task through the interactive
configuration utilities that come with NI-VISA/NI-VXI. Refer to your
getting started manual for more information about the NI-VISA/NI-VXI
software.

Application Development Environments

In addition to the NI-VISA/NI-VXI software, you can use the National
Instruments LabVIEW, Measurement Studio, and LabWindows™/CVI™
application programs and instrument drivers to ease your programming
task. These standardized programs match the modular virtual instrument
capability of VXI and can reduce your VXI/VME software development
time. These programs are fully VXIplug&play compliant and feature
extensive libraries of VXI instrument drivers written to take full advantage
of direct VXI control. LabVIEW and Measurement Studio include all the
tools needed for instrument control, data acquisition, analysis, and
presentation.

LabVIEW is an easy-to-use, graphical programming environment you can
use to acquire data from thousands of different instruments, including
IEEE 488.2 devices, VXI devices, serial devices, PLCs, and plug-in data
acquisition boards. After you have acquired raw data, you can convert it
into meaningful results using the powerful data analysis routines in
LabVIEW. LabVIEW also comes with hundreds of instrument drivers,

MXI-2 Configuration Reference Manual C-2 ni.com

Appendix C National Instruments Software Choices

which dramatically reduce software development time, because you do not
have to spend time programming the low-level control of each instrument.

Measurement Studio includes support for Microsoft Visual C++, Visual
Basic, and the .NET platform.

LabWindows/CVI is an interactive ANSI C programming environment
designed for building virtual instrument applications. LabWindows/CVI
delivers a drag-and-drop editor for building user interfaces, a complete
ANSI C environment for building your test program logic, and a collection
of automated code generation tools, as well as utilities for building
automated test systems, monitoring applications, or laboratory
experiments.

To use any of these application programs, install them before the
NI-VISA/NI-VXI software installation. LabVIEW, Measurement Studio,
and LabWindows/CVI integrate the VXI and VISA libraries that are
required to support your PCI-based MXI-2 products. You also get hundreds
of complete instrument drivers, which are modular, source-code programs
that handle the communication with your instrument to speed your
application development.

© National Instruments Corporation C-3 MXI-2 Configuration Reference Manual

Technical Support and
Professional Services

Visit the following sections of the National Instruments Web site at

ni.com for technical support and professional services:

• Support—Online technical support resources include the following:

– Self-Help Resources—For immediate answers and solutions,

visit our extensive library of technical support resources available
in English, Japanese, and Spanish at
resources are available for most products at no cost to registered
users and include software drivers and updates, a KnowledgeBase,
product manuals, step-by-step troubleshooting wizards, hardware
schematics and conformity documentation, example code,
tutorials and application notes, instrument drivers, discussion
forums, a measurement glossary, and so on.

– Assisted Support Options—Contact NI engineers and other

measurement and automation professionals by visiting

ni.com/ask. Our online system helps you define your question

and connects you to the experts by phone, discussion forum,
or email.

• Training—Visit
interactive CDs. You also can register for instructor-led, hands-on
courses at locations around the world.

• System Integration—If you have time constraints, limited in-house
technical resources, or other project challenges, NI Alliance Program
members can help. To learn more, call your local NI office or visit

ni.com/alliance.

ni.com/custed for self-paced tutorials, videos, and

D

ni.com/support. These

If you searched
your local office or NI corporate headquarters. Phone numbers for our
worldwide offices are listed at the front of this manual. You also can visit
the Worldwide Offices section of
office Web sites, which provide up-to-date contact information, support
phone numbers, email addresses, and current events.

© National Instruments Corporation D-1 MXI-2 Configuration Reference Manual

ni.com and could not find the answers you need, contact

ni.com/niglobal to access the branch

Glossary

Prefix Meaning Value

n- nano- 10

µ- micro- 10

m- milli- 10

M- mega- 10

G- giga- 10

Numbers/Symbols

° Degrees

Ω Ohms

% Percent

–9

–6

–3

6

9

A

A Amperes

A16 space VXIbus address space equivalent to the VME 64 KB short address space.

In VXI, the upper 16 KB of A16 space is allocated for use by VXI device
configuration registers. This 16 KB region is referred to as VXI
configuration space.

A24 space VXIbus address space equivalent to the VME 16 MB standard address

space.

A32 space VXIbus address space equivalent to the VME 4 GB extended address space.

ACFAIL A VMEbus backplane signal asserted when a power failure has occurred

(either AC line source or power supply malfunction), or if it is necessary to
disable the power supply (such as for a high temperature condition).

address Character code that identifies a specific location (or series of locations) in

memory.

© National Instruments Corporation G-1 MXI-2 Configuration Reference Manual