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RTD PC/104 数据模块板DM6852HR Hardware Manual.pdf
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详细说明：RTD PC/104 数据模块板DM6852HR Hardware Manualpdf,RTD PC/104 数据模块板DM6852HR Hardware ManualRevision history
Rev a
Initial release
Published by
RTD Embedded Technologies, Inc
103 Innovation blvd
State College. PA 16803-0906
Copyright 1999, 2002, 2003, 2004 by rtD Embedded Technologies, Inc
All rights reserved
Printed in Us.a
The rtd logo is a registered trademark of rTD Embedded Technologies. cpuModule and utility module
are trademarks of rtd embedded Technologies. Phoenix PIco and pheonixPico blos are trademarks of
Phoenix Technologies Ltd. PS/2, PC/XT, PC/AT and IBM are trademarks of International Business ma
hines inc. MS-DOS. Windows. Windows 95. windows 98 and Windows nt are trademarks of microsoft
Corp. PC/104 is a registered trademark of PC/104 Consortium. All other trademarks appearing in this doc
ument are the property of their respective owners
DM5852HR/DM6852HR Isolated digital 1/o-module board hardware manual
INTRODUCTION
General purpose digital lo
Isolated power outputs
Isolated optocoupler inputs
66677
Mechanical description
Connector description
What comes with your board
Board accessories
8
Using this manual
When you need hell
889
CHAPTER 1- BOARD SETTINGS
Factory-configured jumper settings
10
Base Address jumpers (Factory setting: 300h)
10
Pull-up or Pull-down resistor selection for digital IO PA, PB, PC
?
PC4-PC7 Optocoupler isolated inputs(factory setting: +5V range
13
CHAPTER 2- BOARD INSTALLATION
14
Board installation
15
External io connections
18
Isolated Output Connector
18
Isolated Input Connector
20
50-pin RTD Expansion Connector
CHAPTER 3- HARDWARE DESCRIPTION
22
Digital 1/O, Programmable Peripheral Interface(PPI)
24
Isolated outputs
5
Isolated inputs
26
Interrupts
27
DM5852HR/DM6852HR Isolated digital I/o-module board hardware manual
CHAPTER 4- BOARD OPERATION AND PROGRAMMING
28
Defining the 1/o Map
29
Base+O Output latch A
29
Base+1 Ouput latch A
Base+2 s
30
Base+3 Clear Interrupt
30
Base+4 PPi Port A Read/write
Base+5 PPi Port B(Read/Write)
31
Base+6 PPI Port C (Read/Write low byte Read/write high byte)
31
Base+/ ppi port cw(write)
31
Programming the dm6852HR
Clearing and setting bits in an lo port
Initializing the 8255 PPI
35
Isolated output programming
35
Triggering of isolated digital outputs
36
Interrupts
what is an interrupt
37
-Interrupt request lines
37
8259 Programmable Interrupt Controller
38
nterrupt Mask Register (IMr)
38
End-of-Interrupt(EOf) Command
38
What exactly happens when an interrupt occurs?
38
Using interrupt in your program
39
Writing an Interrupt service routine (Isr)
39
Saving the startup Interrupt Mask Register(IMR) and interrupt vector
41
Common Interrupt mistakes
APPENDIX A
43
LIMITED WARRANTY
44
DM5852HR/DM6852HR Isolated digital I/o-module board hardware manual
List of illustrations
1-1 Board layout showing jumper locations
1-2 Base Address jumpers
1-3 Pull-up and Pull-down jumpers for Ports a, b and c
1-4 Optocoupler input range jumpers
2-1 DM6852HR integrated with a Pc/104 dataModule stack
16
2-2 19 Eurocard rack installation with an integrated pc/104 datamodule
17
and EUROCARD cpuModule computer system
2-3a Power output interface using the spring loaded connector
18
2-3b Power output interface using 50-pin header connector
19
2-4a Discrete wire spring
loaded connector pinout for Isolated digital inputs 20
2-4b Header connector pinout for lsolated digital inputs
20
2-550-pin expansion interface connector layout
21
3-1 DM6852HR Block Diagram
23
DM5852HR/DM6852HR Isolated digital I/o-module board hardware manual
Introduction
This user's manual describes the operation of the dm6852HR Isolated digital board
Some of the key properties of the DM5852HR/DM6852HR include
e8 MOSFet buffered channel-by-channel isolated digital outputs
4 Optocoupled digital inputs with jumper selectable ranges
i 24 non isolated TTL/CMOS compatible 8255-based digital 1O lines
a Optional Pull-up or Pull-down resistors
s Simple yo or externally triggered output control
Double buffered outputs with data storage register
Software selected interrupts
s Support for direct pc/104 interfacc with rtd datamodulcs
i Single +5v operation
* dM5852HR is Xt bus and dM6852hR is an at bus version
※PC/104 form factor
The following paragraphs briefly describe the major features of the DM6852HR
A more detailed discussion is included in Chapter 3(Hardware description) and in
Chapter 4(Board operation and programming. The board setup is described in Chapter 1
(Board settings)
General purpose digital/0
The DM6852HR board has 24 8255-based TTL/CMOS compatible digital l/o
lines which can be directly interfaced with external devices or signals to sense switch
closures, trigger digital events, or activate solid-state relays. These lines may be pulled
down or pulled up with a 1oKohm resistor networks Installation procedures will be
described later in this manual
Isolated power outputs
8 high current MosfeT buffered outputs may be used to directly drive heavy
loads such as solenoids relays motors. actuators heaters etc. The output transistors are
driven with an
advanced FET-driver that protects the output transistor. Optocouplers are used to isolate
the
high current output channels from the computer. The high power outputs are controlled
with a double buffered latch structure. an external trigger may be used to transfer the
preloaded data from the first storage latch to the second output latch without the attention
of the host computer. an interrupt may be asserted after the trigger condition has ocurred
DM5852HR/DM6852HR Isolated digital I/o-module board hardware manual
Isolated optocoupler inputs
4 optocoupler inputs may be used to connect high voltage signals to your system
Four channel-by-channel jumper configurable input ranges are available: +5V, +12V and
+24V. The optocoupler inputs have a reverse voltage protection diode across the input
This
enables AC-signals to be connected to the inputs. The input diode will act as a rectifier
Mechanical description
The DM6852HR is designed on a pc/104 form factor. An easy mechanical
interface to both PC/104 and eurocard Systems can be achieved Stack your PC/104
compatible computer directly on the dm6852HR using the onboard mounting holes
DM5852HR is XT bus and DM6852 is an at bus version. Y ou may use the dm6852HR
board in an idan system in a single high or alternatively a double high frame
Connector description
There is a 50 pin digital interface connectors on the dM6852hR to directly
interface to the non isolated 8255-based digital 1/O signals. The signal definition of this
connector is compatible with the digital PC/104 dataModules manufactured by rtd
Isolated outputs and inputs are connected to the dm6852hR by either a terminal
block discrete wire connector or ith a 50-pin flat ribbon cable header connector. Use
this type of interfacc connector with a tb50 screw terminal block. Please consult the
factory for more
details on different connector options
What comes with your board
You receive the following items in your DM6852HR package
: DM6852HR Isolated digital interface module
e Users manual
Note Software and and drivers are available on our website
If any item is missing or damaged, please call RTD Embedded Technologies, Inc
(814)234-8087
DM5852HR/DM6852HR Isolated digital I/o-module board hardware manual
Board accessories
In addition to the items included in your dm6852HR delivery several software
and hardware accessories are available. call your distributor for more information on
these accessories and for help in choosing the best items to support your instrumentation
system
The dm6852HR module is available in the ultra compact robust aluminium
enclosuresystemIdaN.Formoreinformationpleasevisitourwebsiteatwww.rtd.com
RTD Embedded Technologies, Inc can supply a complete set of accessories for
your DM6852HR card These include PC/104 power supplies, Terminal boards(tb50
and other interconnection systems
Using this manual
This manual is intended to help you install your new DM6852HR/DM6852 card
and get it running quickly, while also providing enough detail about the board and its
functions so that you can enjoy maximum use of its features even in all applications
When you need help
This manual and all the example programs will provide you with enough
information to fully utilize all the features on this board. If you have any problems
installing or using this board, contact our Technical Support Department(8 14)234-8087
orsendafaxto(814)234-5218orEmailtosalesrtd.comWhensendingafaXor
Email rcqucst, plcasc includc your company's namc and address, your name, your
telephone number, and a brief description of the problem
DM5852HR/DM6852HR Isolated digital I/o-module board hardware manual
CHAPTER 1- BOARD SETTINGS
The DM6852HR Isolated digital lo board has jumper settings you can change to
suit your application and sensor input configuration. The DM6852HR is factory
configured with a +5V input range configuration. The factory settings are listed and
shown in the diagram in the beginning of this chapter
DM5852HR/DM6852HR Isolated digital I/o-module board hardware manual
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