ADLINK cPCI-9116 User Manual

cPCI-9116®/cPCI-9116R®

64 Ch, 16 bit, 250KS/s

Analog input Card

For 3U CompactPCI

User’s Guide

Recycled Paper

©Copyright 2002 ADLINK Technology Inc.

All Rights Reserved.

Manual Rev. 1.10: April 28, 2003

Part No: 50-15002-101
The information in this document is subject to change without prior n otice in

order to improve reliability, design and function and does not represent a
commitment on the part of the manufacturer.

In no event will the manufacturer be liable for direct, indirect, special, incidental,
or consequential damages arising out of the use or inability to use the product
or documentation, even if advised of the possibility of such damages.

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Other products names mentioned herein are used for identification purposes

only and may be trademarks and/or registered trademarks of their respective
companies.

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you need any help or service, please contact us.

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Table of Contents

Tables..........................................................................................................iv

Figures.........................................................................................................v

Outline of Chapters.................................................................................... vi

Chapter 1 Introduction................................................................................1

1.1 Features..............................................................................................2

Applications ........................................................................................2

1.2

1.3 Specifications......................................................................................3

1.4 Software Support................................................................................6

1.4.1 Programming Library.............................................................6

1.4.2 PCIS-LVIEW: LabVIEW® Driver............................................6

1.4.3 DAQBenchTM: ActiveX Controls.............................................7

Chapter 2 Installation..................................................................................8

2.1 What You Have...................................................................................8

2.2 Unpacking...........................................................................................9

2.3 cPCI-9116 and cPCI-9116R Layout..................................................10

2.4 PCI Configuration..............................................................................12

Chapter 3 Signal Connections.................................................................13

3.1 Connectors and Pin Assignment.......................................................13

3.1.1 100-pin SCSI-type connector (J1) .......................................14

3.1.2 Legend of J1........................................................................15

3.2 Analog Input Signal Connection........................................................16

3.2.1 Types of signal sources.......................................................16

3.2.2 Input Configurations ............................................................16

3.3 Digital I/O Connection....................................................................... 18

Chapter 4 Registers..................................................................................19

4.1 I/O Port Address ...............................................................................19

4.2 Internal Timer/Counter Register........................................................21

4.3 General Purpose Timer/Counter Register.........................................22

4.4 General Purpose Timer/Counter Control Register............................22

4.5 A/D Data Registers...........................................................................24

4.6 Channel Gain Queue Register..........................................................24

4.7 A/D & FIFO Control Register ............................................................26

4.8 A/D & FIFO Status Register..............................................................27

4.9 Digital I/O register.............................................................................29

4.10 A/D Trigger Mode Register ...............................................................30

4.11 Interrupt Control Register..................................................................31

4.12 Interrupt Status Register...................................................................33

Table of Contents • i

Chapter 5 Operation Theory.....................................................................34

5.1 A/D Conversion.................................................................................34

5.1.1 A/D Conversion Procedure..................................................34

5.1.2 Software conversion with polling data transfer acquisition

mode (Software Polling)......................................................35

5.1.3 Programmable scan acquisition mode.................................36

5.1.4 A/D Data Transfer Modes....................................................47

5.2 Digital Input and Output....................................................................48

5.3 General Purpose Timer/Counter Operation ......................................49

Chapter 6 C/C++ Library...........................................................................51

6.1 Libraries Installation..........................................................................51

6.2 Programming Guide..........................................................................52

6.2.1 Naming Convention.............................................................52

6.2.2 Data Types..........................................................................52

6.2.3 Sample Programs List (DOS)..............................................53

6.3 Initial functions..................................................................................54

6.3.1 _9116_Initial........................................................................ 54

6.3.2 _9116_AD_Clr_DFIFO........................................................55

6.4 DIO functions....................................................................................56

6.4.1 _9116_DI.............................................................................56

6.4.2 _9116_DO...........................................................................56

6.5 AD Channel Gain Queue configuration functions..............................57

6.5.1 _9116_AD_Clr_CFIFO........................................................57

6.5.2 _9116_AD_Set_CFIFO .......................................................58

6.5.3 _9116_AD_CFIFO_SetDone...............................................60

6.6 AD Software-Polling functions...........................................................61

6.6.1 _9116_AD_Acquire .............................................................61

6.7 AD Trigger control functions .............................................................62

6.7.1 _9116_AD_Trig_Ctrl............................................................62

_9116_AD_Set_TrigMode...................................................62

_9116_AD_Set_TrigPol.......................................................62

_9116_AD_Set_Timebase ..................................................62

_9116_AD_Set_Delay_SRC ...............................................62

_9116_AD_Set_M_enable ..................................................62

6.8 AD Counter setting functions ............................................................64

6.8.1 _9116_AD_Set_SC.............................................................64

6.8.2 _9116_AD_Set_SI...............................................................65

6.8.3 _9116_AD_Set_SI2.............................................................65

6.8.4 _9116_AD_Set_DIV............................................................66

6.8.5 _9116_AD_Set_DLY1.........................................................66

6.8.6 _9116_AD_Set_M...............................................................67

6.8.7 _9116_AD_Set_Retrig.........................................................68

ii • Table of Contents

6.9 AD one-shot scan data acquisition with DMA transfer functions.......69

6.9.1 _9116_AD_DMA_Start........................................................69

6.9.2 _9116_AD_DMA_Status .....................................................70

6.9.3 _9116_AD_DMA_Stop........................................................71

6.10 AD one-shot scan data acquisition with interrupt- transfer functions.72

6.10.1 _9116_AD_INT_Start..........................................................72

6.10.2 _9116_AD_INT_Status........................................................73

6.10.3 _9116_AD_INT_Stop ..........................................................74

6.11 AD continuous scan data acquisition with double-buffered DMA

transfer functions ..............................................................................75

6.11.1 _9116_DblBufferMode........................................................75

6.11.2 _9116_DblBufferTransfer ....................................................76

6.11.3 _9116_GetOverrunStatus....................................................77

6.12 General Purpose Timer/Counter functions........................................77

6.12.1 _9116_GP0_Set_Mode.......................................................77

6.12.2 _9116_GP0_Set_Count ......................................................78

6.12.3 _9116_GP0_Set_CLK.........................................................78

6.12.4 _9116_GP0_Set_GATE_SRC.............................................79

6.12.5 _9116_GP0_Set_UPDOWN_SRC......................................79

6.12.6 _9116_GP0_Set_UPDOWN................................................80

6.12.7 _9116_GP0_EN ..................................................................80

6.12.8 _9116_GP0_Read_Count ...................................................81

Chapter 7 Software Utility & Calibration.................................................82

7.1 Running 9116util.exe program..........................................................82

7.2 Calibration.........................................................................................83

7.2.1 What do you need ...............................................................83

7.2.2 VR Assignment....................................................................84

7.2.3 A/D Adjustment ...................................................................84

7.3 Functional Testing.............................................................................85

Warranty Policy.........................................................................................87

Table of Contents • iii

Tables

Table 1. Legend of J1 Connector......................................................15

Table 2. I/O Port Address..................................................................20

Table 3. Timer/Counter Register Address.........................................21

Table 4. General Purpose Timer/Counter Register...........................22

Table 5. General Purpose Timer/Counter Control Register...............22

Table 6. GPTC0’s Mode selection.....................................................23

Table 7. A/D Data Registers..............................................................24

Table 8. Channel Gain Queue Register ............................................24

Table 9. Gain Selection Bits..............................................................25

Table 10. A/D & FIFO Control Register...............................................26

Table 11. A/D & FIFO Status Register ................................................27

Table 12. Digital I/O register (Read)....................................................29

Table 13. Digital I/O register (Write)....................................................29

Table 14. A/D Trigger Mode Register..................................................30

Table 15. Trigger Mode Selection Bits ................................................31

Table 16. Interrupt Control Register....................................................31

Table 17. Interrupt Status Register......................................................33

Table 18. Functions of VRs.................................................................84

iv • Tables

Figures

Figure 1: PCB Layout of the cPCI-9116 .............................................10

Figure 2: PCB Layout of cPCI-9116R and Rear I/O adaptor .............. 11

Figure 3: J1 Pin Assignments.............................................................14

Figure 4: Single-ended Mode and Floating sources...........................16

Figure 5: Ground-referenced source and differential input .................17

Figure 6: Floating source and differential input...................................17

Figure 7: Ground-referenced source and User Common Mode

connections.........................................................................18

Figure 8: Digital I/O Connection..........................................................18

Figure 9: Scan Timing ........................................................................37

Figure 10: Pre-trigger (trigger occurs after M scans)............................40

Figure 11: Pre-trigger (trigger with scan is in progress)........................40

Figure 12: Pre-trigger with M_enable = 0 (trigger occurs before M

scans)..................................................................................41

Figure 13: Pre-trigger with M_enable = 1 ............................................. 42

Figure 14: Middle trigger with M_enable = 1.........................................43

Figure 15: Middle trigger (trigger with scan is in progress)...................44

Figure 16: Post trigger..........................................................................44

Figure 17: Delay trigger........................................................................45

Figure 18: Post trigger with re-trigger...................................................46

Figure 19: General-purpose Timer/Counter model...............................49

Figure 20: Mode 0 Operation................................................................50

Figure 21: Mode 1 Operation................................................................50

Figure 22: CPCI-9116 Utility Main Screen............................................83

Figure 23: A/D Adjustment menu Screen.............................................84

Figure 24: cPCI-9116 Function Testing Screen....................................86

Figures • v

Outline of Chapters

This manual is designed to help you use the 9116 series. The manual
describes how to modify various settings on the card to meet your
requirements. It is divided into seven chapters:

Chapter1, “Introduction”,

applications, and specifications.

Chapter 2, “Installation”,

layout of 9116 series is shown.

Chapter 3, “Signal Connection”,

assignment and how to connect external signal and devices
to the 9116 series card.

Chapter 4, “Registers”,

structure. This information is important for programmers
who want to control the hardware with low-level
programming.

Chapter 5, “Operation theory”,

9116 series card. The A/D, DIO and timer/counter functions
are introduced. Also, some programming concepts are
specified.

Chapter 6, “Software Utility & Calibration”,

utility program included in the software CD and how to
calibrate the 9116 series card for accurate measurements.

gives an overview of the product features,

describes how to install the 9116 series. The

describes the connectors' pin

describes the details of the registers and its

describes the working theory of the

describes how to run the

vi • Outline of Chapters

1

Introduction

The cPCI-9116 series products are advanced data acquisition cards based on
the 32-bit CompactPCI architecture. The 9116 series include:

cPCI-9116: 16-bit 250KHz DAS card for 3U CompactPCI

•

cPCI-9116R: 16-bit 250KHz DAS card for 3U CompactPCI

•

with Rear I/O connector

The 9116 series DAS cards use state-of-the-art technology making it an ideal
for data logging and signal analysis applica tions in medical, process control,
etc.

Introduction • 1

1.1 Features

The 9116 series CompactPCI Advanced Data Acquisition Card provides the
following advanced features:

32-bit PCI-Bus, plug and play

•

Up to 64 single-ended inputs or 32 differential inputs, mixing

•

of using SE and DI analog signal sources

16-bit analog input resolution

•

On-board A/D 1K FIFO memory

•

512 words analog input Channel Gain Queue spaces

•

Sampling rate up to 250KS/s

•

Bipolar or Unipolar input signals

•

Programmable gain of x1, x2, x4, x8

•

Jumper-less and software configurable

•

Five A/D trigger modes: software trigger, pre-trigger,

•

post-trigger, middle-trigger and delay-trigger

Software Polling, Interrupt and Bus-mastering DMA data

•

transfer available

8 digital input and 8 digital output channels

•

100-pin D-type SCSI-II connector for cPCI-9116

•

100-pin D-type SCSI-II connector on a rear I/O transition

•

board for cPCI-9116R

Compact size: standard compact PCI 3U size

•

1.2 Applications

Automotive Testing

•

Cable Testing

•

Transient signal measurement

•

ATE

•

Laboratory Automation

•

Biotech measurement

•

2 • Introduction

1.3 Specifications

Analog Input (A/D)

♦

Converter:

•

Number of channels: (programmable)

•

64 single-ended (SE)

3

32 differential input (DI)

3

Mixing of SE and DI analog signal between channel allowed

3

A/D Data FIFO Buffer Size:

•

Channel Gain Queue Length:

•

Resolution:

•

Input Range:

•

Bipolar:

3

Unipolar:

3

CMRR (DC to 60 Hz, typical)

•

Input Range CMRR

LT1606 (or equivalent) 250KHz

16-bit

(Controlled by Channel Gain Queue)

± 5V, ±2.5V, ±1.25V, ±0.625V

0~10V, 0~5V, 0~2.5V, 0~1.25

1024 locations

512 words configurations

±5, 0~10V

±2.5, 0~5V

±1.25, 0~2.5V

±0.625, 0~1.25V

Overvoltage Protection:

•

Accuracy:

•

Input Impedance:

•

Time-base source:

•

3

3

Programmable scan interval and sampling rate (divided from

•

0.01% of FSR

Internal 24MHz
External clock Input (fmax: 24MHz, fmin: 1MHz)

87dB
90dB
92dB
93dB

Continuous ± 35V maximum

100 MΩ | 6pF

time-base source)

Introduction • 3

Trigger Mode:

•

Software-trigger.

3

Pre-trigger.

3

Post-trigger.

3

Middle-Trigger.

3

Delay Trigger

3

Data Transfer:

•

Polling.

3

EOC interrupt transfer.

3

FIFO half-full Interrupt transfer.

3

Bus-mastering DMA.

3

Data Throughput:

•

Digital I/O (DIO)

♦

Channel:

•

Input Voltage:

•

3

3

Output Voltage:

•

3

3

General Purpose Timer/ Counter

♦

Number of channel:

•

Clock Input:

•

8 TTL compatible digital inputs and outputs

Low: VIL=0.8 V max. IIL=0.2mA max.
High: VIH=2.0V max. IIH=0.02mA max

Low: VOL=0.5 V max. IOL=8mA max.
High: VOH=2.7V min; IOH=400μA

Internal 24MHz or External CLK input up to 20MHz

250KHz (maximum)

One 16-bit Up/Down Timer/Counter

4 • Introduction

General Specifications

♦

Connector:

•

Operating Temperature:

•

Storage Temperature:

•

Humidity:

•

Power Consumption:

•

+5V @ 560mA typical

3

+3.3V@ 100mA typical

3

15V (pin35, pin85) Output Current (max):

±

•

+5V(pin49, pin99) Output Current (max):

•

Dimension:

•

100-pin D-type SCSI-II connector

0° C ~ 60° C

-20° C ~ 80° C

5 ~ 95%, non-condensing

Standard Compact PCI 3U size

5mA

500mA

Introduction • 5

1.4 Software Support

ADLINK provides versatile software drivers and packages for users’ different
approach to building a system. We not only provide programming libraries
such as DLL for many Windows systems, but also provide drivers for other
software packages such as LabVIEW®.

All software options are included in the ADLINK CD. Non-free software drivers
are protected with licensing codes. Without the software code, you can install
and run the demo version for two hours for trial/demonstration purposes.
Please contact ADLINK dealers to purchase the formal license.

1.4.1 Programming Library

For customers who are writing their own programs, we provide function
libraries for many different operating systems, including:

PCIS-DASK: Include device drivers and DLL for Windows

•

98, Windows NT and Windows 2000. DLL is binary compati bl e
across Windows 98, Windows NT and Windows 2000. That
means all applications developed with PCIS-DASK are
compatible across Windows 98, Windows NT and Windows

2000. The developing environment can be VB, VC++, Delphi,
BC5, or any Windows programming language that allows calls
to a DLL. The user’s guide and function reference manual of
PCIS-DASK are in the CD. Please refer the PDF manual files
under \\Manual_PDF\Software\PCIS-DASK

PCIS-DASK/X: Includes device drivers and shared library for

•

Linux. The developing environment can be Gnu C/C++ or any
programming language that allows linking to a shared librar y.
The user's guide and function reference manual of
PCIS-DASK/X are in the CD.
(\Manual_PDF\Software\PCIS-DASK-X.)

The above software drivers are shipped with the board. Please refer to the
“Software Installation Guide” for installation procedures.

1.4.2 PCIS-LVIEW: LabVIEW® Driver

PCIS-LVIEW contains the VIs, which are used to interface with NI’s
LabVIEW® software package. The PCIS-LVIEW supports Windows
95/98/NT/2000. The LabVIEW® drivers is shipped free with the board. You
can install and use them without a license. For more information about
PCIS-LVIEW, please refer to the user’s guide in the CD.
(\\Manual_PDF\Software\PCIS-LVIEW)

6 • Introduction

1.4.3 DAQBenchTM: ActiveX Controls

We suggest customers who are familiar with ActiveX controls and VB/VC++
programming use the DAQBenchTM ActiveX Control component library for
developing applications. The DAQBenchTM is designed under Windows
NT/98. For more information about DAQBench, please refer to the user’s
guide in the CD. (\\Manual_PDF\Software\DAQBench\DAQBench
Manual.PDF).

Introduction • 7

2

Installation

This chapter describes how to install the 9116 series cards. The contents of the
package and unpacking information that you should be aware of are described
first.

The 9116 series cards perform an automatic configuration of the IRQ, port
address, and BIOS address. You do not need to set these configurations, as
you would do in ISA form factor DAS cards. Automatic configuration allows
your system to operate more reliable and safe.

2.1 What You Have

In addition to this User's Guide, the package should also include the following
items:

cPCI-9116 or cPCI-9116R with rear I/O adaptor Analog input

•

Data Acquisition Card

ADLINK All-in-one Compact Disc

•

Software Installation Guide

•

If any of these items are missing or damaged, contact the dealer from
whom you purchased the product. Save the shipping materials and carton
in case you want to ship or store the product in the future.

8 • Installation

2.2 Unpacking

The card contains electro-static sensitive components tha t can be easily be
damaged by static electricity.

Therefore, the card should be handled on a grounded anti-static mat. The
operator should be wearing an anti-static wristband, grounded at the same
point as the anti-static mat.

Inspect the card module carton for obvious damages. Shipping and handling
may cause damage to your module. Be sure there are no shipping and
handling damages on the modules carton before continuing.

After opening the card module carton, extract the system module and place it
only on a grounded anti-static surface with component side up.

Again, inspect the module for damages. Press down on all the socketed IC's to
make sure that they are properly seated. Do this only with the module place on
a firm flat surface.

Note:

DO NOT APPLY POWER TO THE CARD IF IT HAS BEEN DAMAGED.

You are now ready to install your cPCI-9116/R.

Installation • 9

2.3 cPCI-9116 and cPCI-9116R Layout

10 • Installation

Figure 1: PCB Layout of the cPCI-9116

Figure 2: PCB Layout of cPCI-9116R and Rear I/O adaptor

Installation • 11

2.4 PCI Configuration

1. Plug and Play:

As a plug and play component, the board requests an interrupt number via a
system call. The system BIOS responds with an interrupt assignment based on
the board information and on known system parameters. These system
parameters are determined by the installed drivers and the hardware load seen
by the system.

2. Configuration:

The board configuration is done on a board-by-boar d basis for all PCI form
factor boards on your system. Because configuration is controlled by the
system and software, so there is no jumpers for base-address, DMA, and
interrupt IRQ need to be set by the user.

The configuration is subject to change with every boot of the s ystem as new
boards are added or boards are removed. So, there is no idea what‘s going on
to be installed.

3. Trouble shooting:

If your system doesn’t boot or if you experience erratic operation with your PCI
board in place, it’s likely caused by an interrupt conflict (perhaps because you
incorrectly configured the BIOS setup). In general, the solution, once you
determine it is not a simple oversight, is to consult the BIOS documentation
that came with your system.

12 • Installation

3

Signal Connections

This chapter describes the connectors of the 9116 series. The signal
connections between the 9116 series cards and external devices are also
outlined.

3.1 Connectors and Pin Assignment

The cPCI-9116 is equipped with one 100-pin SCSI-type connector (J1).
J1 is used for digital input/output, analog input, and timer/counter signals. The

pin assignment for the connector is illustrated in the Figure 3.1.
With the REAR I/O adaptor specifically designed for the cPCI-9116R, the

cPCI-9116R connector pin assignments are identical to that of the cPCI-9116.
The red LED positioned on the front panel is used as a power indicator.

Signal Connections • 13

3.1.1 100-pin SCSI-type connector (J1)

U_CMMD 1 51 AGND
AIH0 AI0 2 52 AI32 AIL0
AIH1 AI1 3 53 AI33 AIL1
AIH2 AI2 4 54 AI34 AIL2
AIH3 AI3 5 55 AI35 AIL3
AIH4 AI4 6 56 AI36 AIL4
AIH5 AI5 7 57 AI37 AIL5
AIH6 AI6 8 58 AI38 AIL6
AIH7 AI7 9 59 AI39 AIL7
AIH8 AI8 10 60 AI40 AIL8
AIH9 AI9 11 61 AI41 AIL9

AIH10 AI10 12 62 AI42 AIL10
AIH11 AI11 13 63 AI43 AIL11
AIH12 AI12 14 64 AI44 AIL12
AIH13 AI13 15 65 AI45 AIL13
AIH14 AI14 16 66 AI46 AIL14
AIH15 AI15 17 67 AI47 AIL15
AIH16 AI16 18 68 AI48 AIL16
AIH17 AI17 19 69 AI49 AIL17
AIH18 AI18 20 70 AI50 AIL18
AIH19 AI19 21 71 AI51 AIL19
AIH20 AI20 22 72 AI52 AIL20
AIH21 AI21 23 73 AI53 AIL21
AIH22 AI22 24 74 AI54 AIL22
AIH23 AI23 25 75 AI55 AIL23
AIH24 AI24 26 76 AI56 AIL24
AIH25 AI25 27 77 AI57 AIL25
AIH26 AI26 28 78 AI58 AIL26
AIH27 AI27 29 79 AI59 AIL27
AIH28 AI28 30 80 AI60 AIL28
AIH29 AI29 31 81 AI61 AIL29
AIH30 AI30 32 82 AI62 AIL30
AIH31 AI31 33 83 AI63 AIL31

AGND 34 84 AGND

+15V out 35 85 -15V out

N/C 36 86 N/C

DI0 37 87 DO0

DI1 38 88 DO1

DI2 39 89 DO2

DI3 40 90 DO3

DI4 41 91 DO4

DI5 42 92 DO5

DI6 43 93 DO6

DI7 44 94 DO7

ExtTimeBase 45 95 N/C

ExtTrg 46 96 GP_TC_CLK

SSH_OUT 47 97 GP_TC_GATE

GP_TC_OUT 48 98 GP_TC_UPDN

+5V Out 49 99 +5V out

DGND 50 100 DGND

Figure 3: J1 Pin Assignments

14 • Signal Connections

3.1.2 Legend of J1

Signal Name Definition

U_CMMD User Common Mode
AIn Analog Input Channel n (single-ended)
AIHn Analog High Input Channel n (differential)
AILn Analog Low Input Channel n (differential)
DIn Digital Input Signal Channel n
DOn Digital Output Signal Channel n
ExtTimeBase External Timebase Clock Input
ExtTrg External Digital Trigger Signal
SSH_OUT SSH Output Signal
GP_TC_CLK General Purpose Timer/Counter Clock Input
GP_TC_GATE General Purpose Timer/Counter Gate Input

GP_TC_UPDN
GP_TC_OUT General Purpose Timer/Counter Output

+5V OUT +5V Output
+15V OUT +15V Output

-15V OUT -15V Output
AGND Analog Ground
DGND Digital Ground
N/C No Connection

Purpose Timer/Counter Up/Down Control Input
(0:down, 1:up)

Table 1. Legend of J1 Connector

Signal Connections • 15

AInA

A

3.2 Analog Input Signal Connection

The 9116 series provides up to 64 single-ended or 32 differential analog input
channels. You can set and fill the Channel Gain Queue to get the desired
combination of the input signal types. The analog signals can be converted to
digital value by the A/D converter. To avoid ground loops and to obtain
accurate measurements from the A/D conversion, it is quite important to
understand the signal source type and how to choose the analog input modes:
Single-ended, Differential, or User Common Mode.

3.2.1 Types of signal sources

Floating Signal Sources

A floating signal source means it is not connected in any way to the buildings
ground system. A device with an isolated output is a floating signal sour ce,
such as optical isolator outputs, transformer outputs, and thermocouples

Ground-Referenced Signal Sources

A ground-referenced signal means it is connected in some way to the buildings
system. That is, the signal source is already connected to a common ground
point with respect to the 9116 card, assuming that the computer is plugged into
the same power system. Non- isolated outputs of instruments and devices that
plug into the buildings power system are ground-referenced signal sources.

3.2.2 Input Configurations

Single-ended Mode

In single-ended mode, all input signals are connected to g round provided by
the 9116 card. It is suitable for connections with floating signal sources. Figure
4 illustrates single-ended connection. Note that when more than t wo floating
sources are connected, these sources will be referenced to the same common
ground.

Floating
Signal
Source

V1

n = 0, ...,63

V2

J1

Input Multipexer

GND

Instrumentation

mplifier

-

To A/D
Converter

-

Figure 4: Single-ended Mode and Floating sources

16 • Signal Connections

A

A

x

A

A

r

A

A

x

A

A

r

Differential input mode
The differential input mode provides two inputs that respon d to signal voltage

differences between them. If the signal source is ground- referenced, the
differential mode can be used for common-mode noise rejection. Figure 5
shows the connection of ground-referenced signal sources under different ial
input mode.

Ground
Referenced
Signal
Source

Common­mode noise &
Ground
potential

Vcm

= 0, ..., 31

Figure 5: Ground-referenced source a nd differential input

Fig 6 shows how to connect a floating signal source to the 9116 card in
differential input mode. For floating signal sources, a resistor is required on
each channel to provide a bias return path. The resistor value should be about
100 times the equivalent source impedance. If the source impedance is less
than 100ohms, simply connect the negative side of the signal to AGND as well
as the negative input of the Instrumentation Amplifier, without any resistors. In
differential input mode, less noise is coupled into the signal connections than in
single-ended mode.

Ground
Reference d
Signal
Source

= 0, ..., 31

IxH

IxL

IxH

IxL

In put Multipexer

+

-

GND

Inpu t Multipexer

+

-

Instrumentation

mplifie

To A /D
Converter

-

Instrumentation

mplifie

To A /D
Converter

-

GND

Figure 6: Floating source and differential input

Signal Connections • 17

A

A

User Common Mode (U_CMMD)

To measure ground-referenced signal sources, which are connected to the
same ground point, you can connect the signals in a User-Common-Mode
(U_CMMD) configuration. Fig 7 illustrates the connections. The signal local
ground reference is connected to the negative input of the instrumentation
Amplifier, and the common-mode ground potential to signal ground. The
instrumentation amplifier will now reject the 9116 series ground.

In

U_CMMD

Input Multipexer

-

Instrumentation

mplifier

To A/D

-

Converter

Ground­Referenced
Signal Source

Common­mode noise &
Ground
potential

V1

Vcm

V2

n = 0, ...,63

Figure 7: Ground-referenced source a nd User Common Mode connections

3.3 Digital I/O Connection

The 9116 series card provides 8 digital input and 8 digital output channels. The
digital I/O signals are fully TTL/DTL compatible. The details of the digital I/O
signal specification can be found in section 1.3.

74LS244

From TTL Signal

To TTL Devices

Digital Input(DI)

Digital Output(DO)

Digital GND(DGND)

74LS244

Figure 8: Digital I/O Connection

18 • Signal Connections

4

Registers

The descriptions of the registers and structure of the cPCI-9116 are outlined in
this chapter. The information in this chapter will assist programmers, who wish
to handle the card with low-level programs.

In addition, the low level programming syntax is introduced. This information
can help beginners to operate the cPCI-9116 in the shortest possible time.

4.1 I/O Port Address

The 9116 series card functions as a 32-bit PCI master device to any master on
the PCI bus. It supports burst transfer to memory space by using 32-bit data.
All data read and write are based on 32-bit transactions. Table 2 shows the I/O
address of each register with respect to the base address. The function of each
register is also shown.

Registers • 19

I/O Address Read Write

Base + 0x00 Scan Interval Counter Scan Interval Counter
Base + 0x04 Sample Interval Counter Sample Interval Counter
Base + 0x08 Scan Counter Scan Counter
Base + 0x0C DIV Counter DIV Counter
Base + 0x10 Delay1 Counter Delay1 Counter
Base + 0x14 M Counter M Counter
Base + 0x18 GP Counter/Timer 0 GP Counter/Timer 0
Base + 0x1C X X
Base + 0x20 X GP Counter/Timer Control Reg

Base + 0x24 A/D FIFO Data Reg

Base + 0x28 A/D and FIFO Status Reg. A/D and FIFO Control Reg.
Base + 0x2C X X
Base + 0x30 Digital IN Reg.(Dout) Digital OUT Reg.
Base + 0x34 X A/D Trigger Mode Reg.
Base + 0x38 Interrupt Reason Reg. Interrupt Control Reg.

Table 2. I/O Port Address

Config. Channel Gain Queue
Reg..

20 • Registers