Measurement Computing PC-CARD-DAC08 User Manual

PC-CARD-DAC08

Analog Outputs & Digital I/O

User’s Manual

Revision 1

March, 2001

(C) Copyri

g

ht 2001, Measurement Computing Corporation

MEGA-FIFO, the CIO prefix to data acquisition board model numbers, the PCM prefix to data
acquisition board model numbers, PCM-DAS08, PCM-D24C3, PC-CARD-DAC08,
PCM-COM422, PCM-COM485, PCM-DMM, PCM-DAS16D/12, PCM-DAS16S/12,
PCM-DAS16D/16, PCM-DAS16S/16, PCI-DAS6402/16, Universal Library, InstaCal, Harsh
Environment Warranty and Measurement Computing Co rporation are registered trademarks of
Measurement Computing Corporation.

IBM, PC, and PC/AT are trademarks of International Business Machines Corp. Windows is a
trademark of Microsoft Corp. All other trademarks are the property of their respective owners.

Information furnished by Measurement Computing Corp. is believed to be accurate and
reliable. However, no responsibility is assumed by Measurement Computing Corporation
neither for its use; nor for any infringements of patents or other rights of third parties, which
may result from its use. No license is granted by implication or otherwise under any patent or
copyrights of Measurement Computing Corporation.

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system,
or transmitted, in any form by any means, electronic, mechanical, by photocopying, recording

or otherwise without the prior written permission of Measurement Computing Corporation.

Notice

Measurement Computing Corporation does not authorize any
Measurement Computing Corporation product for use in life support
systems and/or devices without the written approval of the President of
Measurement Computing Corporation Life support devices/systems are
devices or systems which, a) are intended for surgical implantation into
the body, or b) support or sustain life and whose failure to perform can
be reasonably expected to result in injury. Measurement Computing
Corp. products are not designed with the components required, and are
not subject to the testing required to ensure a level of reliability suitable
for the treatment and diagnosis of people.

HM PC-CARD-DAC08.lwp

TABLE OF CONTENTS

9

6 SPECIFICATIONS

.................................................

6

5 I/O ADDRESS MAP & REGISTER FUNCTIONS

......................

54.2 PACKAGED APPLICATIONS PROGRAMS ........................

54.1 PROGRAMMING LANGUAGES .................................

5

4 PROGRAMMING & APPLICATIONS

...............................

43.6 DIGITAL INPUTS & OUTPUTS ..................................

43.5 EXTERNAL INTERRUPT INPUT .................................

43.4 SIGNAL CONNECTION ........................................

43.3 OUTPUT VOLTAGE RANGE ....................................

43.2 CONNECTING DEVICES TO THE ANALOG OUTPUTS .............

33.1 PC-CARD-DAC08 CONNECTOR .................................

3

3 INTERFACING

....................................................

22.2 INSTALL THE PC-CARD .......................................

22.1 SOFTWARE ...................................................

2

2 INSTALLATION

..................................................

1

1 INTRODUCTION

..................................................

This page is blank.

1 INTRODUCTION

The PC-CARD-DAC08 is an eight-channel, analog output control board for IBM PC
compatible computers having PCMCIA-type slots. The heart of the board is an octal,
13-bit digital-to-analog converter of which only 12 bits are used for each output.
Analog voltage signals are generated by the D/A from registers. Control of I/O
operations is done by the Field Programmable Gate Array (FPGA) on the board
(Figure 1-1). Double-buffering of the output registers permit simultaneous output
changes.

Range of the analog outputs is bipolar, ±5V.
In addition to the analog outputs, there are eight bi-directional digital I/O lines

arranged in two, 4-bit ports. They provide the capability of sensing and controlling
discrete events (via external signal-conditioning hardware). The ports can be
programmed to be either eight inputs, eight outputs, or four inputs and four outputs.

Figure 1-1. PC-CARD-DAC08 Block Diagram

1

PCMCIA BUS CONNECTOR P1

(

68-PIN

)

ADDRESS

BUS

HOST BUS ADAPTER

CONTROLLER

FPGA

P2 CONNECTOR (26 PIN)

PC-CARD-DAC08

DIGITAL

I/O

PORT

4 BITS

DIGITAL

I/O

PORT

4 BITS

ATTRIBUTE

MEMORY

DATA

BUS

OCTAL D/A

CONVERTER

13-BIT

D/A OUT 7: 0

DIG I/O 3: 0

DIG I/O 7: 4

EXT INT

2 INSTALLATION

2.1 SOFTWARE

Your PCM card is completely plug and play. There are no switches or jumpers to set
prior to installation in your computer.

Insta

Cal is the installation, calibration and test

software supplied with the board. Refer to the

Extended Software Installation Manual

to install

Insta

Cal.

2.2 INSTALL THE PC-CARD

Follow the steps below to install your PC-Card.

1. Insert the card into a free PC Card/PCMCIA type II or III slot. You do not
have to turn the computer off. The system is designed for power-on
installation.

2. If the appropriate driver is already loaded on the PC, the card should be
detected, recognized, and configured by Windows and you should hear an
insertion beep. If the card is not detected by Windows, go to step 3. To
verify the card has been recognized, go to Control Panel\System\Device
Manager and the card should now appear under "DAS Component."

3. If the drivers are not already loaded on the PC, you will be prompted for a
driver. If you are not prompted for a driver after inserting the card, go to Step

4. The appropriate driver is located on disk 1 of the installation disk set.
Insert this disk. Windows should detect the driver file automatically, install it
and then the card should be detected by Windows and you should hear an
insertion beep. To verify the card has been recognized, go to Control
Panel\System\Device Manager and the card should now appear under "DAS
Component." If your card appears in the list you can now proceed to the
"RUN

Inst

aCal" section of this manual.

4. If the card is not detected by Windows and you are not prompted for a driver
after inserting the card, check that your computer's 32-bit PCMCIA drivers
are enabled. If they are not, enable them and then restart your computer and
try the above procedure again.

2

3 INTERFACING

The PC-CARD-DAC08 connector has eight, single-ended analog outputs, one
interrupt input, eight, digital inputs/outputs and eight ground p ins. A chassis ground is
in the cable shield clips to either side of the 26 pins of the connector.

3.1 PC-CARD-DAC08 CONNECTOR

Figure 3-1 shows a PC-CARD-DAC08 case looking into the male mini-connector.
The connector is mechanically keyed to insure that the cable is inserted correctly.

Figure 3-1. 26-Pin I/O Mini-Connector

Table 3-1. 26-Pin Connector Pinout

D/A OUT 726GND13

D/A OUT 625GND12

D/A OUT 524GND11

D/A OUT 423GND10

D/A OUT 322GND9

D/A OUT 221GND8

D/A OUT 120GND7

D/A OUT 019PC +5V OUT6

DIGITAL I/O 718DIGITAL I/O 65

DIGITAL I/O 517DIGITAL I/O 44

DIGITAL I/O 316DIGITAL I/O 23

DIGITAL I/O 115DIGITAL I/O 02

EXT. INTERRUPT IN14GND1

SIGNAL NAMEPINSIGNAL NAMEPIN

Analog devices to be controlled should be connected with the high side to the
numbered analog output and the low side to an adjacent ground.

Refer to Section 7, Specifications, for information on a mating cable,
PC-CARD-C37F/26. This cable will permit attachment to a variety of screw terminal
and signal conditioning bo ards. The PC-CARD-DAC08 used in conjunction with the

3

PC-CARD-C37F/26 cable is pin compatible with the PCM-DAC08 using the
PCM-C37/33 cable.

3.2 CONNECTING DEVICES TO THE ANALOG OUTPUTS

The analog outputs are single-ended. You must avoid potentials between signal
ground and chassis ground on your computer. If you are using a laptop and a re on
battery power, the computer is floating with respect to earth ground, but the laptop is
on the charger unit or on wall power, the laptop may be grounded.

Whenever the computer is grounded, you must connect signals so there is no potential
between PC ground and signal ground. If there is a potential, it will be added to the
signal. For example, if your card is supplying 3.5 volts and there is a potential of

-1.5V between the PC and the sensor ground, your device under control will be
reading 2.0V instead of 3.5V

3.3 OUTPUT VOLTAGE RANGE

There is only one output voltage range, ±5VDC.

3.4 SIGNAL CONNECTION

Loads drawing higher currents than the maximum current specified in the electrical
spec will cause the analog output to drop, meaning that a code of 4095 will not be able
to generate a full scale voltage of 5V, but somewhat less.

3.5 EXTERNAL INTERRUPT INPUT

Pin 14 on the 26 p in I/O mini-connector is an external input which will generate an
interrupt to the computer. The interrupt must be enabled through software. The
interrupt is falling edge triggered using TTL level signals. The procedure initiated by
an interrupt is wholly dependent on programming.

3.6 DIGITAL INPUTS & OUTPUTS

The PC-CARD-DAC08 has eight bi-directional digital I/O lines. The eight digital
lines can be programmed as input or output in groups of: eight inputs, eight outputs or
four inputs and four outputs. A register controls the directio n of the digital I/O lines
and must be set via software. At power-on or reset, the digital lines are set as inputs.

4

Please note: Digital lines in an input state present a high impedance to any device
connected to them. The implication of this is that if you are using a digital line to
control the input of a TTL chip, and that digital line changes from an output to an
input, the TTL chip be ing controlled may detect the turned around line as a “1” or a
“0”. This could cause the T TL input being controlled to switch on or off, possibly
causing bad consequences for the system you are controlling. To prevent random
switching and force all digital lines into a known state on power up or reset, use pull

-up or pull-down resistors to fix the state of the line as either high or low. A properly
selected resistor will not interfere with TTL level output signals.

For more information on programming the digital I/O lines, please refer to the
Universal library programmers manual.

4 PROGRAMMING & APPLICATIONS

4.1 PROGRAMMING LANGUAGES

Universal Library provides complete access to the PC-CARD-DAC08 functions from
a range of p rogramming languages; both DOS and Windows. If you are planning to
write programs, or would like to run the example programs for Visual Basic or any
other language, please turn now to the Universal library manual.

4.2 PACKAGED APPLICATIONS PROGRAMS

Many packaged application programs, such as SoftWIRETM, have drivers for the
PC-CARD-DAC08. If the package you own does not appear to have drivers you need,
please fax the package name and the revision number from the install disks. We will
research the package for you and advise by return fax how to obtain necessary drivers.

5

5 I/O ADDRESS MAP & REGISTER FUNCTIONS

A base address register controls the beginning, or 'Base Address' of the I/O addresses
occupied by the control registers of the PC-CARD-DAC08. Sixteen addresses are
allocated to the PC-CARD, however, only 5 addresses are actually used. The base
address assigned by CSS is stored in the CB.CBG file by InstaCal.

After CSS is installed and a base address has b een estab lished, the PC-CARD-DAC08
is controlled by writing to and reading from the control registers. While it is possible
to write your own control routines, routines have been written and are available in
Universal librar y for DOS and Wind ows pro gra mming languages. We support the use
of the PC-CARD-DAC08 through high level languages using Universal Library.

All I/O access can be performed as bytes or words. Eight-bit addressing is controlled
by the CSS, which is currently set for 8-bit addressing. The registers are presented in
8-bit format here.

BASE + 0 - DAC0 LSB Data Register

D/A0D/A1D/A2D/A3D/A4D/A5D/A6D/A7

01234567

Any read to this register triggers an D/A conversion. This is a good method of starting
conversions from software or time of day clock control.

WRITE: D/A Data can be written to this address and to Base + 1 to form a 12-bit

D/A data word. All eight DAC’s are updated using this register. The DAC
being updated is set via the Select bits (S3 to S0) in the Base +2 register.

READ: Starts a D/A conversion. Updates the output of the selected DACs in Base

+ 2 Register.

BASE + 1 - DAC Value MSB (4 bits)

D/A8D/A9D/A10D/A11D/A12XXX

01234567

WRITE: Send DAC data.
READ: Clear Interrupt Request bit at Base +4 bit D#3

BASE + 2 - DAC Select Register

S0S1S2S3CLRXXX

01234567

WRITE: Select the DAC to update
READ: Read back Currently Selected DAC

S2: S0:

The data entered to registers base +0 and base +1 will be latched to the
DAC register defined by these bits (see table 5-1).

6

Table 5-1. DAC Selection and Update Mode

No write function if S3 setUpdate All DACsXXX1

Latch new D/A Value for DAC7Update DAC6 & 71110

Latch new D/A Value for DAC6Update DAC6 & 70110

Latch new D/A Value for DAC5Update DAC4 & 51010

Latch new D/A Value for DAC4Update DAC4 & 50010

Latch new D/A Value for DAC3Update DAC2 & 31100

Latch new D/A Value for DAC2Update DAC2 & 30100

Latch new D/A Value for DAC1Update DAC0 & 11000

Latch new D/A Value for DAC0Update DAC0 & 10000

Function on Base + 0,

Base + 1 Write

Function on

Base + 0 Read

S0S1S2S3

S3: Setting the S3 bit to 1 enables simultaneous update mode. Setting S3 to 0

updates the DACs in pairs.

Note that DACs are always updated in pairs if S3 is set to 0. For example, if you latch
new data to DAC1, then update the DAC0 and DAC1 pair, DAC1 updates with the
new value and DAC0 updates with the same value as before since the latch (data for
output) has not changed.

If S3 is set to 1, a read from the base +0 register will simultaneously update all eight
DACs with the data previously latched to the DAC registers.

CLR: Setting the CLR bit to 1 resets all eight DAC outputs to 0V. Default and

normal operation is CLR = 0, which has no effect on the DAC outputs.

BASE + 3 - Digital I/O (8 bits)

DIO0DIO1DIO2DIO3DIO4DIO5DIO6DIO7

01234567

WRITE: Updates output of DIO bits set for output.
READ: Reads current status of DIO bits for input. Reads back output state of DIO

bits set for output.

BASE + 4 - Interrupt Control & Digital I/O Direction Control

LDIRUDIRINT_ENINTREQ

XXXX

01234567

WRITE: Set control bits.
READ: Read status of control bits.
INTREQ Default is no interrupt has occurred = 0. When set to 1 an interrupt has

occurred.
External interrupts, when enabled, occur at TTL falling edge.
A read of base + 1 clears this bit.

7

Interrupt status routines may want to read and verify this bit then clear it
with a read of Base +1.

INT_EN Enable external interrupt. Enable = 1. Disable = 0.

8

6 SPECIFICATIONS

Typical for 25°C unless otherwise specified.

Power Consumption

+5V quiescent

57 mA typical, 135 mA maximumCIS Read

42 mA typical, 110 mA maximumNormal Operation

Analog Output Section

SoftwareD/A trigger modes

Programmed I/OData transfer

System-dependent. Using the Universal Library
programmed output function (cbAout) in a loop, in
Visual Basic, a typical update rate of 50 kHz
(±3kHz) can be expected. This rate was measured
on a 500 MHz Pentium III based PC running under
Windows 98.

Throughput

Software PacedD/A pacing

±5V. 1 LSB = 2.44mVOutput Range

8 Voltage Output, Single-endedNumber of channels

12 bits. LSB of converter not used.Resolution

MAX547 13-bit Octal MDACD/A converter type

Accuracy

±1.8 LSB Typical Accuracy (SW calibrated)

±4.0 LSB Absolute Accuracy (SW calibrated)

Accuracy Components (Uncalibrated)

±2 max, 0.5 typ±0.5 max, ±0.3

typ

±12.0 max, ±3.0 typ±40 max, ±20.0 typ

ILEDLEOffset ErrorGain Error

Total board error is a combination of Gain, Offset, Integral Linearity and Differential
Linearity error. The theoretical worst-case error of the board may be calculated by
summing these component errors. Worst case error is realized only in the unlikely
event that each of the component errors are at their maximum level, and causing error
in the same direction. Each PC-CARD-DAC08 is tested at the factory to ensure the
board’s overall SW calibrated error does not exceed ±4.0 LSB.

Typical accuracy is derived directly from the various component typical errors. This
typical error calculation for a SW calibrated PC-CARD-DAC08 yields ±1.8 LSB.

9

However, this again assumes that each of the errors contributes in the same direction
and the ±1.8 LSB specification is quite conservative.

0.1 ohms maxOutput impedance

DCOutput coupling

Indefinite @15 mAOutput short-circuit duration

±1 mA minCurrent Drive

8.0 µs typSettling Time (to ½ LSB of FSR)

± 1.6 V/µs minSlew Rate

Miscellaneous:

Double-buffered output latches
Update in DAC pairs (i.e., DAC 0/1, 2/3...) or all DACs simultaneously
Coding: Offset Binary (0 code = -FS, 4095 code = +FS)
Power-up and reset, all DAC's cleared to 0 volts, ± 10.2mV typ
'CLEAR' command to reset all DAC's to 0 volts, ± 10.2mV typ in software

Digital Input / Output

External Interrupt triggeredInterrupt source

ProgrammableInterrupt enable

Input mode (high impedance)Power-up / reset state

−0.5V , +5.5V

Absolute maximum input voltage

3.86V min

Output high voltage (IOH =−4mA)

0.23V maxOutput low voltage (IOL = 4 mA)

2.0V minInput high voltage

0.8V maxInput low voltage

Two ports, four bits each. Programmable as
8 input , 8 output or 4 input / 4 output

Configuration

FPGADigital type

Environmental

0 to 95% non-condensingHumidity

−40 to 100°C

Storage Temperature Range

0 to 70°COperating Temperature Range

Mechanical

PCMCIA type II:

85.6mm L x 54.0mm W x 5.0mm H

Card dimensions

10

Connector and Pin Out

Translates to 37D pinout using
PC-CARD-C37F/26 cable.

Connector Compatibility:

Honda 26-Pin mini D-typeConnector Type:

Main Connector:

D/A OUT 726GND13

D/A OUT 625GND12

D/A OUT 524GND11

D/A OUT 423GND10

D/A OUT 322GND9

D/A OUT 221GND8

D/A OUT 120GND7

D/A OUT 019PC +5V OUT6

DIGITAL I/O 718DIGITAL I/O 65

DIGITAL I/O 517DIGITAL I/O 44

DIGITAL I/O 316DIGITAL I/O 23

DIGITAL I/O 115DIGITAL I/O 02

EXT. INTERRUPT IN14GND1

SIGNAL NAMEPINSIGNAL NAMEPIN

PC-CARD-C37F/26 User Connections on 37D:

GND19

N/C37D/A OUT 018

N/C36GND17

N/C35GND16

N/C34GND15

GND33PC +5V OUT14

D/A OUT 732GND13

GND31GND12

D/A OUT 630DIGITAL I/O 711

GND29DIGITAL I/O 610

D/A OUT 528DIGITAL I/O 59

GND27DIGITAL I/O 48

D/A OUT 426DIGITAL I/O 37

GND25DIGITAL I/O 26

D/A OUT 324DIGITAL I/O 15

GND23DIGITAL I/O 0 4

D/A OUT 222GND3

GND21EXTERNAL INTERRUPT IN2

D/A OUT 120GND1

SIGNAL NAMEPINSIGNAL NAMEPIN

NOTE:

Pins 19, 21, 23, 25, 27, 31, and 33 connected to pin 1 inside 37D housing.

11

NOTE:

If the 37-pin connector (P2) is removed from the C37F/26 cable assembly
and is to be replaced by a different user’s connector, wiring of the
replacement connector must adhere to the twisted-pair pairings listed in
the following table.

Wire Run List C3726 - P1 (Honda) to P2 (37D)

33SHIELD_

18
28

RED
BRN

19
24

26
11

RED

WHT

23
18

2

22

ORN
RED

14
21

17
24

BLK
YEL

13
22

29

5

YEL
RED

12
15

16

9

BLK
RED

11
17

13
15

BLK
BRN

9

10

12
32

BLK
ORN

7

26

14
30

GRN
RED

6

25

8

10

WHT

BLK

4
5

6
7

BLK
GRN

3

16

4
3

RED
BLU

2
8

1

20

BLK
BLU

1

20

P2

37D

Twisted

Pair

P1

Honda

12

For Your Notes

13

For Your Notes

14

EC Declaration of Conformity

We,

Measurement Computing Corporation, declare under sole responsibility that the

product:

DescriptionPart Number

PCMCIA Eight-Channel Analog Output
Board with eight DIO channels.

PC-CARD-DAC08

to which this declaration relates, meets the essential requirements, is in conformity
with, and CE marking has been applied according to the relevant EC Directives listed
below using the relevant sectio n of the following EC standards and other normative
documents:

EU EMC Directive 89/336/EEC: Essential requirements relating to electromagnetic
compatibility.

EU 55022 Class B: Limits and methods of measurements of radio interference
characteristics of information technology equipment.

EN 50082-1: EC generic immunity requirements.

IEC 801-2: Electrostatic discharge requirements for industrial process measurement

and control equipment.

IEC 801-3: Radiated electromagnetic field requirements for industrial process
measurements and control equipment.

IEC 801-4: Electrically fast transients for industrial process measurement and control
equipment.

Carl Haapaoja, Director of Quality Assurance

Measurement Computing Corporation

16 Commerce Boulevard,

Middleboro, Massachusetts 02346

[phone]

Fax: [phone]

E-mail: [e-mail]

www.measurementcomputing.com