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RTD PC/104 数据模块板DM6912HR Hardware Manual.pdf
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详细说明：RTD PC/104 数据模块板DM6912HR Hardware Manualpdf,RTD PC/104 数据模块板DM6912HR Hardware ManualDM6912
User's manual
RTD Embedded Technologics, INC.
103 Innovation blvd
State Colleye. PA 16803-0906
Phone:+1-814-234-8087
FAX:+1-814-234-5218
E-mail
sales(artd. com
techsupportartd.com
web site
http:/www.rtd.ce
Revision history
Rev.a New manual naming method
Published by
RTD Embedded Technologies, Inc
103 Innovation blvd
State College, PA 16803-0906
Copyright 1999, 2002, 2003 by RTD Embedded Technologies, Inc
all rights
Printed in U.S.A
The RTd logo is a registered trademark of rTD Embedded Technologies. cpuModule and utility Module are trademarks
ofrtd embedded Technologies phoenixPICo and pheonixPIco bloS are trademarks of phoenix technologies ltd, ps
2. PC/XT. PC/AT and IbM are trademarks of International Business machines 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 document are the property of their respective owners
Table of contents
INTRODUCTION
Digital 1/o
8254 Timer/Counters
.i-3
What comes with your module
i-3
Module accessories
Using This manual...
·:.·+*······(
When You Need Help
CHAPTER1一 MODULE SETTINGS…,1-1
Factory-Configured Switch and Jumper Settings
JPl, JP2- Interrupt Channel Select (Factory Setting: Jumper installed on G; IRQ Disabled)
JP3--8254 Clock and Gate Source Select(Factory Settings: See Figure 1-4)
IP5- Strobe Input Enable(Factory Setting: Disabled)
17
JP4-Interrupt Source Select(Factory Setting: OT2)
1-7
SW1-Base Address(Factory Setting: 300 hex(768 decimal))
1-8
JP6 through JPll, Pull-up/Pull-down resistors on Digital I/O Lines
CHAPTER 2- MODULE INSTALLATION
2-1
Module installation
2-3
External i/o Connections
2-3
Connecting the digital i/o
.2-4
Connecting the Timer/ Counter I/o
Connecting the External Interrupt……
·······中·*·····
2-4
Running the 69 12Diag Diagnostics Program ..............
CHAPTER 3- HARDWARE DESCRIPTION
。。自。自。;。非。D。b鲁自。。;·。。。。。。非鲁。·。鲁。。鲁看4非。·。自e自。。。自自非。鲁。
3-1
Digitall o
3-3
Timer/ Counters
CHAPTER4— LO MAPPING…
4-1
Defining the I/O Map…
.4-3
BA+0: Digital I/O Port 0, Bit Programmable Port ( Read/write)
BA+1: Digital l o port 1, Byte Programmable Port(Read/ Write)………
BA+2: Read/Program Port 0 Direction/Mask/Compare Registers(Read/write).......4-4
BA+ 3: Read Digital I/O Status/Program Digital Mode(Read/Write)
4-5
BA+4: Digital 1/O Port 2, Bit Programmable Port(Read/write)....
4-6
BA+5: Digital lo port3, Byte Programmable Port(Read/ Write)……………
4-6
BA + 6: Read/Program Port 2 Direction/Mask/Compare Registers(Read/Write)
4-6
BA+7: Read Digital 1/O Status/Program Digital Mode(Read/Write)......4-7
BA+ 8: Digital 1/O Port 4, Bit Programmable Port (Read/ write).......
4-8
BA+9: Digital I/O Port 5, Byte Programmable Port(Read/Write)
4-8
BA+ 10: Read/Program Port 4 Direction/Mask/Compare Registers(Read/write)............ 4-8
BA+ll: Read Digital lO Status/Program Digital Mode(read/Write)
BA +12: 8254 Timer/ Counter 0(Read/Write)
4-10
BA+ 13: 8254 Timer/Counter 1( Read/write )..
4-10
BA+ 14: 8254 Timer/Counter 2(Read/ Write)
4-10
BA+15:8254 Timer/ Counter Control word( Write Only)……..….……4-10
BA+16: Clear IRQ/iRQ Enable(read/Write
4-10
BA+17: IRQ Status(Read Only)
BA +18: Reserved
4-11
BA+9: Reserved
.4-11
Programming the DM6912
4-12
Clearing and Setting Bits in a Port
4-12
CHAPTER5-DIGITAL IO.
Ports 0, 2, and 4 Bit Programmable Digital I/O
Advanced Digital Interrupts: Mask and Compare Registers
Ports 1.3. and 5: port Programmable digital i/o
Resetting the Digital Circuitr
robing data into Ports O,2,and4………
5-3
CHAPTER 6-TIMER/COUNTERS
6-1
CHAPTER 7- INTERRUPTS
7-1
JP4: Jumper Selectable Interrupts
.7-3
Advanced Digital Interrupts
7-3
Event mode
7-3
Match mode
7-3
Sampling Digital Lines for Change of state……
7-3
Selecting the Interrupt Channel
Interrupt sharing…………
Basic Programming For Interrupt Handling
What Is an Interrupt?
7-5
Interrupt Request Lines
7-5
8259 Programmable Interrupt Controller .......
·····:
Interrupt Mask Register (IMr)
End-of-Interrupt (EoD Command
…7-5
What Exactly Happens When an Interrupt Occurs?
Using Interrupts in Your Programs
Writing an Interrupt Service Routine(ISr)
7-6
Saving the Startup Interrupt Mask Register (IMr)and Interrupt Vector
7-8
Restoring the Startup IMR and Interrupt Vector………
8
Common Interrupt mistakes
7-8
APPENDIXA-DM6912 SPECIFICATIONS
A-1
APPENDIX- CONNECTOR PIN ASSIGNMENTS
B-1
APPENDIX C- COMPONENT DATA SHEETS mmC-1
APPENDIX D- WARRANTY
D-1
List of illustrations
1-1
Module Layout Showing Factory-Configured Settings
Interrupt Channel Select Jumpers, JPI and JP2
1-3
Pulling down the Interrupt request lines
8254 Clock and Gate Sources Jumpers, JP3
8254 Circuit Diagram
1-6
1-6
Strobe Input Enable Jumper, JP5
4··
17
1-7
Interrupt Source Select Jumper,JP4..…….….….….….….….…..…….….…1-7
1-8
Base address switch SW1
Port o Pull-up/Pull-down Resistor Connections, JP6
·*··
2-1
CN3 1O Connector pin assignments
DM6912 Block diagram
∴.3-3
3-2
Timer/Counter Circuit block diagram
8254 Timer/Counter ci
Block di
6-3
7-1
Digital Interrupt Timing Diagram
7-3
lV
INTRODUCTION
2
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