VersaLogic VCM-DAS-3 User manual

Reference
Manual
REV. February 2020
VCM-DAS-3
Analog Output & Digital I/O
Module for the PC/104 Bus

VCM-DAS-3 Reference Manual ii
WWW.VERSALOGIC.COM
12100 SW Tualatin Road
Tualatin, OR 97062-7341
[phone]
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Contents Copyright ©2013-2020
All Rights Reserved
Notice:
Although every effort has been made to ensure this document is error-free, VersaLogic makes no
representations or warranties with respect to this product and specifically disclaims any implied warranties
of merchantability or fitness for any particular purpose.
VersaLogic reserves the right to revise this product and associated documentation at any time without
obligation to notify anyone of such changes.
PC/104 and the PC/104 logo are trademarks of the PC/104 Consortium.
MVCMDAS3

VCM-DAS-3 Reference manual iii
Product Release Notes
Rev 2.5 Release
Updated the High Output Digital I/O figure (page 2)
Rev 2 Release
Production release.
Rev 1 Release
Alpha. No customer release.
Support Page
The VCM-DAS-3 support page, at http://www.VersaLogic.com/private/vcmdas3support.asp, contains
additional information and resources for this product including:
Reference Manual (PDF format)
Operating system information and software drivers
Data sheets and manufacturers’ links for chips used in this product
BIOS information and upgrades
Utility routines and benchmark software
Note: This is a private page for VCM-DAS-3 users that can be accessed only be entering this address
directly. It cannot be reached from the VersaLogic homepage.

VCM-DAS-3 Reference Manual iv
Contents
Introduction ...................................................................................................................1
Description..........................................................................................................................1
Technical Specifications.....................................................................................................2
RoHS Compliance ..............................................................................................................3
About RoHS...........................................................................................................3
Warnings.............................................................................................................................3
Electrostatic Discharge..........................................................................................3
Technical Support...............................................................................................................4
Repair Service........................................................................................................4
Physical Description.....................................................................................................5
Dimensions .........................................................................................................................5
Side Profile............................................................................................................6
External Connectors ........................................................................................................... 6
Connector Locations..............................................................................................6
Connector Functions and Interface Cables............................................................7
J1 I/O Connector....................................................................................................8
J2 I/O Connector....................................................................................................9
J3 I/O Connector..................................................................................................10
Installation ........................................................................................................................11
Hardware Assembly............................................................................................. 11
Stack Arrangement Example...............................................................................11
Configuration...............................................................................................................12
Jumper Blocks ..................................................................................................................12
Jumpers As-Shipped Configuration.....................................................................12
Jumper Summary.................................................................................................13
Base Address Configuration.............................................................................................14
Bit Mode Configuration....................................................................................................15
Enhanced Mode Configuration......................................................................................... 16
Power-up Span Range Configuration............................................................................... 16
Registers......................................................................................................................17
I/O Port Mapping..............................................................................................................17
I/O Port Register Functions.................................................................................18
Enhanced Mode Registers ................................................................................................ 19
Enhanced Control Register..................................................................................19
Enhanced Mode Data Registers...........................................................................20
Digital I/O Control Register ............................................................................................. 21
Digital I/O Data Registers ................................................................................................22
Digital Input Registers.........................................................................................22
Digital Output Registers......................................................................................23
External Trigger Enable Register .....................................................................................24
Analog Output Data Registers..........................................................................................25

Contents
VCM-DAS-3 Reference manual v
DAC Channel Select Register .............................................................................25
DAC Write Registers...........................................................................................26
DAC Read Registers............................................................................................26
Analog Output .............................................................................................................27
Analog Output Ranges and Resolution............................................................................. 27
Setting a Span Range...........................................................................................27
Analog Output Data Representation................................................................................. 28
Straight Binary Coding........................................................................................28
Offset Binary Coding...........................................................................................29
Analog Output Programming............................................................................................31
External Trigger Update......................................................................................31
Load DAC Operation...........................................................................................31
Analog Output Code Example..........................................................................................32
Calibration ........................................................................................................................34
Setting the Gain...................................................................................................34
Reading the Gain .................................................................................................34
Enhanced Mode Operations.............................................................................................. 35
Reading DAC Data..............................................................................................35
Reading the Span of a Channel............................................................................ 35
Setting a Channel to Sleep Mode ........................................................................36
Reading the Sleep Status of a Channel................................................................36
Digital I/O .....................................................................................................................37
Signal Direction................................................................................................................ 37
Signal Polarity ..................................................................................................................37
Digital Input......................................................................................................................37
Digital Output...................................................................................................................37
References...................................................................................................................38

VCM-DAS-3 Reference Manual 1
Introduction
Description
The VCM-DAS-3 is a PC/104-format data acquisition board that provides analog outputs and
digital I/O for process control and other applications. Its features include:
16 analog voltage outputs with 12-bit
resolution
Multiple output ranges
Software adjustable output ranges per
channel
Simultaneous or individual DAC
update
Power-up ranges set by jumpers in
groups of eight, reset per channel by
software
Software calibration
16-bit or 8-bit ISA modes
Read-back of DAC and SPAN codes
Reset/power up to 0V outputs for all
ranges
External trigger
+5V operation
24-channel digital I/O
The VCM-DAS-3 module provides 16 single-ended analog outputs and 24 digital I/O channels.
Fully compatible at the register and connector level with the Diamond Systems Ruby-MM DAC
board, VCM-DAS-3 also provides enhanced mode operation that extends its capabilities. In
enhanced mode:
Analog output ranges can be set for individual channels through software.
Analog output and ranges can be read from individual channels.
Specific analog channels can be placed into sleep mode to conserve power.
Individual channels can be updated and read.
Calibration can be performed with software.
11

Technical Specifications
VCM-DAS-3 Reference Manual 2
Technical Specifications
Specifications are typical at 25°C with 5.0V supply unless otherwise noted.
Board Size: 3.55” x 3.775” (PC/104 standard)
Storage Temperature:
-40° C to +85° C
Operating Temperature:
-40° C to +85° C
Power Requirements:
5V ±10%
Analog Output:
Channels: 16 outputs
Resolution: 12 bits
Output Ranges: Bipolar: ±10V, ±5V, ±2.5V, -2.5V to 7.5V
Unipolar: 0 - 10V, 0 - 5V
Output Current: ±5 mA max per channel
Settling Time: 8 uS Typ. (±10V Range, 20V Step to ±1LSB)
Accuracy: ±1 LSB
Integral
Nonlinearity: ±1 LSB
Differential
Nonlinearity: ±1 LSB
Calibration: One gain and one zero adjustment for all channels
Gain Temp.
Coefficient: ±2 ppm/° C
Update Method: Simultaneous, individual, or external trigger
Reset: Outputs reset to 0V when board is jumpered for Enhanced Mode,
mid-scale otherwise
Digital I/O:
Channels: 24
Compatibility: CMOS / TTL, 82C55 Mode 0 only
Low Input Voltage: -0.3V min., 0.8V max
High Input Voltage: 2.0V min., 5.5V max.
Low Output
Voltage: 0.4V max.
High Output
Voltage: 3.0V min.
Output Current: +4 mA / -8 mA max.
Pull-up Resistor: 10 K Ohm
Reset: All channels set to input mode
Software:
Operating Systems:Compatible with most X86 operating systems including
Windows 95/85/NT/CE/XP, QNX, VxWorks, and Linux
Driver Support: No native drivers. Fully compatible with Diamond Systems drivers.
Compatibility:
PC/104 – Full compliance, 8-bit and 16-bit
Weight:
0.152 lbs (0.069 kg)
Specifications are subject to change without notice.

RoHS Compliance
VCM-DAS-3 Reference Manual 3
RoHS Compliance
The VCM-DAS-3 is RoHS-compliant.
ABOUT ROHS
In 2003, the European Union issued Directive 2002/95/EC regarding the Restriction of the use of
certain Hazardous Substances (RoHS) in electrical and electronic equipment.
The RoHS directive requires producers of electrical and electronic equipment to reduce to
acceptable levels the presence of six environmentally sensitive substances: lead, mercury,
cadmium, hexavalent chromium, and the presence of polybrominated biphenyls (PBB) and
polybrominated diphenyl ethers (PBDE) flame retardants, in certain electrical and electronic
products sold in the European Union (EU) beginning July 1, 2006.
VersaLogic Corporation is committed to supporting customers with high-quality products and
services meeting the European Union’s RoHS directive.
Warnings
ELECTROSTATIC DISCHARGE
Warning! Electrostatic discharge (ESD) can damage circuit boards, disk drives and other
components. The circuit board must only be handled at an ESD workstation. If an
approved station is not available, some measure of protection can be provided by
wearing a grounded antistatic wrist strap. Keep all plastic away from the board,
and do not slide the board over any surface.
After removing the board from its protective wrapper, place the board on a
grounded, static-free surface, component side up. Use an antistatic foam pad if
available.
The board should also be protected inside a closed metallic anti-static envelope
during shipment or storage.

Technical Support
VCM-DAS-3 Reference Manual 4
Technical Support
If you are unable to solve a problem after reading this manual please visit the VCM-DAS-3
Product Support web page at http://www.VersaLogic.com/private/vcmdas3support.asp. If
you have further questions, contact VersaLogic technical support at [phone]. VersaLogic
technical support engineers are also available via e-mail at [e-mail].
REPAIR SERVICE
If your product requires service, you must obtain a Returned Material Authorization (RMA)
number by calling [phone]. VersaLogic’s standard turn-around time for repairs is five
working days after the product is received.
Please provide the following information:
Your name, the name of your company and your phone number
The name of a technician or engineer that can be contacted if any questions arise.
Quantity of items being returned
The model and serial number (barcode) of each item
A detailed description of the problem
Steps you have taken to resolve or recreate the problem
The return shipping address
Warranty Repair All parts and labor charges are covered, including return shipping
charges for UPS Ground delivery to United States addresses.
Non-warranty Repair All non-warranty repairs are subject to diagnosis and labor charges,
parts charges and return shipping fees. Please specify the shipping
method you prefer and provide a purchase order number for invoicing
the repair.
Note: Please mark the RMA number clearly on the outside of the box before
returning.
VCM-DAS-3 Support Website
http://www.VersaLogic.com/private/vcmdas3support.asp

VCM-DAS-3 Reference Manual 5
Physical Description
Dimensions
The VCM-DAS-3 complies with all PC/104 standards. Dimensions are given below to help with
pre-production planning and layout.
Figure 1. Dimensions and Mounting Holes
(Not to scale. All dimensions in inches.)
22
3.375
0.00
0.15
3.05
–0.1875
0.00
3.15
3.3625
3.575
-0.20
= Pin 1