PC104-DO48H
User's Guide
Revision 3
September, 2000
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Table of Contents
1.0 INTRODUCTION ...................................
2.0 SOFTWARE INSTALLATION ........................
3.0 HARDWARE SETUP ................................
4.0 HARDWARE INSTALLATION .......................
5.0 CONTROL & DATA REGISTERS .....................
6.0 SPECIFICATIONS ..................................
1
2
2
23.1 BASE ADDRESS ..................................
5
54.1 CABLING TO THE DO48 CONNECTOR ...............
54.2 SIGNAL CONNECTION ............................
54.3 CONNECTOR DIAGRAM ..........................
7
8
This page is blank.
1.0 INTRODUCTION
The PC104-DO48H is a digital output board.
The ‘H’ designation indicates that these boards are capable of ‘High Drive’. High
Drive TTL is capable of higher currents than standard TTL. A High Drive output is
capable of supplying 15 mA and sinking 64 mA.
There is no control register to set the port direction from input to output. The
PC104-DO48H boards are output only.
The PC104-DO48H conforms to the 50-pin connector pin specification of all
CIO-DIO family of digital boards, so can be used in place of one another without
changing cabling or connectors.
The board is supported by Universal Library programming library.
1
2.0 SOFTWARE INSTALLATION
The board has a variety of switches and jumpers to set before installing the board in
your computer. By far the simplest way to configure your board is to use the
InstaCal
you all available options, how to configure the various switches and jumpers (as
applicable) to match your application requirements, and will create a configuration
file that your application software (and the Universal Library) will refer to so the
software you use will automatically know the exact configuration of the board.
TM
program provided as part of your software package. InstaCalTM will show
Please refer to the Extended Software Installation Manual regarding the installation
TM
and operation of InstaCal
. The following hard copy information is provided as a
matter of completeness, and will allow you to set the hardware configuration of the
TM
board if you do not have immediate access to InstaCal
and/or your computer.
3.0 HARDWARE SETUP
Open your PC (after turning off the power) and install the board. Leave the switches
as they were set at the factory or refer to the information below to change the settings.
After the board is installed and the computer is closed up, turn the power back on.
3.1 BASE ADDRESS
The PC104-DO48H employs the PC bus for power, communications and data transfer.
As such it draws power from the PC, monitors the address lines and control signals
and responds to it's I/O address, and it receives and places data on the data lines.
The BASE address is the most important user selectable bus related feature of the
PC104-DO48H. The base address is the location that software writes to and reads
from when communicating with the PC104-DO48H.
The base address switch is the means for setting the base address. Each switch
position corresponds to one of the PC b us address lines. By placing the switch down,
the PC104-DO48H address decode logic is programmed to respond to that address bit.
A complete address is constructed by setting the HEX or decimal number which the
PC104-DO48H will respond to. In the example shown, switches 1 and 2
are DOWN, all others are UP.
2
Switch 1 = 200h (512D) and switch 2 = 100h (256D). Added together, they equal
300h (768D), the base address.
Figure 3-1. Address Switches and Pin 1 Locations
Certain addresses are used by the PC while others are free and can be used by the
PC104-DO48 and other expansion boards. We recommend trying the factory default
address, 300h (768D), first.
S w H E X
1 2 3 4 5 6 7
1 200
2 100
380
440
520
610
708
Figure 3-2. Base Address Switch Block - 300h Shown
3
The PC104-DO48H BASE switch may be set for address in the range of 000-3F8 so it
should not be hard to find a free address area for your PC104-DO48H. Once again, if
you are not using IBM prototyping cards or some other board which occupies these
addresses, then 300-31F HEX are free to use. Refer to Table 3-1 below.
Addresses not specifically listed, such as 390-39F, are not reserved and may be
available. Check your computer for other boards which may be using I/O addresses.
Table 3-1 PC I/O Addresses
FUNCTIONHEX
RANGE
FUNCTIONHEX
RANGE
EGA2C0-2CF8237 DMA #1000-00F
EGA2D0-2DF8259 PIC #1020-021
GPIB (AT)2E0-2E78253 TIMER040-043
SERIAL PORT2E8-2EF8255 PPI (XT)060-063
SERIAL PORT2F8-2FF8742 CONTROLLER (AT)060-064
070-071
CMOS RAM & NMI MASK (AT)
PROTOTYPE CARD300-30F
PROTOTTYPE CARD310-31FDMA PAGE REGISTERS080-08F
HARD DISK (XT)320-32F8259 PIC #2 (AT)0A0-0A1
PARALLEL PRINTER378-37FNMI MASK (XT)0A0-0AF
SDLC380-38F8237 #2 (AT)0C0-0DF
SDLC3A0-3AF80287 NUMERIC CO-P (AT)0F0-0FF
MDA3B0-3BBHARD DISK (AT)1F0-1FF
PARALLEL PRINTER3BC-3BFGAME CONTROL200-20F
EGA3C0-3CFEXPANSION UNIT (XT)210-21F
CGA3D0-3DFBUS MOUSE238-23B
SERIAL PORT3E8-3EFALT BUS MOUSE23C-23F
FLOPPY DISK3F0-3F7PARALLEL PRINTER270-27F
SERIAL PORT3F8-3FFEGA2B0-2BF
4
4.0 HARDWARE INSTALLATION
Turn the power off.
Locate the PC104 expansion bus in your computer.
Push the board firmly down into the expansion bus connector. If it is not seated fully
it may fail to work and could short circuit the PC bus power onto a PC bus signal.
This could damage the motherboard in your PC or the board.
4.1 CABLING
The connector is a standard 50-pin header connector. A cable with mating connectors
(C50FF-#) may be purchased from
Those familiar with the CIO-DIO##H boards will find the signal levels and pin
assignments are identical with those on the PC104-DO48H.
Measurement Computing Corporation
4.2 SIGNAL CONNECTION
The PC104-DO48H signals are buffered (high output drive) STTL. STTL is an
electronics industry term, short for Schotky Transistor Transistor Logic, which
describes a standard for digital signals which are either near 0V or near 5V.
.
4.3 CONNECTOR DIAGRAM
The PC104-DO48H connector is a 50-pin header type connector (Figure 4-1). The
signals available are direct connections to a digital buffer chip.
5
The connector accepts female 50-pin header type connectors, such as those on the
C50FF-2, 2 foot cable with connectors.
BASE + 4, 5, 6
Figure 4-1. 50-Pin Connector
If frequent changes to signal connections or signal conditioning is required, please
refer to the information on the CIO-TERM100, CIO-SPADE50 and CIO-MINI50
screw terminal boards.
6
5.0 CONTROL & DATA REGISTERS
Each PC104-DO48 is composed of parallel output chips. Each address contains one
latch and one buffer contr olling eight output pins. The ports are arranged in sets of
three, with an intervening NA (not used) address. This scheme allows compatibility
with software written to control 82C55 based boards when the 82C55 is used as all
outputs. On those boards every fourth address contains a control register.
The first address, or BASE ADDRESS, is determined by setting a bank of switches on
the board.
To write a control data to an o utput register, the individual bits must be set to 0 or 1
then combined to form a Byte.
The registers and their function are listed on the following table.
WRITE FUNCTIONREAD FUNCTIONADDRESS
Port A OutputNoneBASE + 0, 4
Port B OutputNoneBASE + 1, 5
Port C OutputNoneBASE + 2, 6
NoneNoneBASE + 3, 7
There are two sets of digital output lines. Each set has 24 outputs that are divided into
three ports of eight lines each. An 8-bit register accesses each port. The register
addresses are given in the table above and the bit maps below.
PORT A DATA
BASE ADDRESS + 0, 4
PORT B DATA
BASE ADDRESS + 1, 5
PORT C DATA
BASE ADDRESS + 2, 6
01234567
A0A1A2A3A4A5A6A7
01234567
B0B1B2B3B4B5B6B7
01234567
C0C1C2C3C4C5C6C7
7
6.0 SPECIFICATIONS
Power consumption
+5V quiescent 750 mA typical, 980 mA maximum
Digital Output
Digital Type 74S244
Configuration 6 banks of 8 bits each, output only
Number of channels 48 outputs
Output High 2.4 volts min @ −15mA
Output Low 0.5 volts max @ 64 mA
Power up / reset state Logic low
Environmental
Operating temperature range 0 to 70°C
Storage temperature range −40 to 100°C
Humidity 0 to 90% non-condensing
8
For your notes.
9
For your notes.
10
EC Declaration of Conformity
Measurement Computing Corporation
We,
product:
DescriptionPart Number
PC104-DO48H
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 section of the following EC standards and other normative
documents:
Digital output board
, declare under sole responsibility that the
EU EMC Directive 89/336/EEC
compatibility.
EU 55022 Class B
characteristics of information technology equipment.
EN 50082-1
IEC 801-2
and control equipment.
IEC 801-3
measurements and control equipment.
IEC 801-4
equipment.
Carl Haapaoja, Director of Quality Assurance
: Electrostatic discharge requirements for industrial process measurement
: Radiated electromagnetic field requirements for industrial process
: Electrically fast transients for industrial process measurement and control
: Limits and methods of measurements of radio interference
: EC generic immunity requirements.
: Essential requirements relating to electromagnetic
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