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AD1200
User manual
Real Time Devices AD1200 User Manual
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Contents
Table of Contents
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Table of Contents
Table of Contents
Introduction
Digital-To-Analog Conversion (ADA1200 Only
What Comes with Your
Chapter 1 Board
P3 - Analog Input Voltage Range (Facrory Setring: T0 Volrs)
P4 - Analog Input Voltage Polarity (Facory Seuing: +/-)
P5 - DMA Request Channel (Factory Setting: Disabled)
P6 - DMA Acknowledge Channel (Factory Sening: Disabled)
CHAPTER 2 _ BOARD INSTALLATION 2-L
Connecting the Analog Input Pins
Running the 1200DIAG Diagnostics Prrogram
Connecting the Timer/Counters and Digital VO
Chapter 3 - Hardware Description
Chapter 4 Board
BA + 2: Reset (Write Only)
BA + 9: 8254 Timer/Countor I
Clearing and Setting Bits in
Enabling and Disabling the Extemal Trigger
Enabling and Disabling Intemrprs
Conversion Modes/Triggering
Starting an A/D Conversion
Monitoring Conversion Status @MA Done or End-Of-Convert)
Reading the Converted Data
Programming the Pacer Clock
8259 Programmable Intemrpt Controller
Intemrpt Mask Register (IMR)
End-Of-Interrupt (EOI) Command
Using Intemrpts in Your Programs
Writing an Interrupt Service Routine (ISR)
Restoring the Startup IMR and Interrupt Vector
Common Interrupt Mistakes
Choosing a DMA Channel
Allocating a DMA Buffer
Calculating the Page and Offset of a Buffer
The DMA
DMA Single Mask Register
Programming the DMA Controller
Programming the 1200 for DMA
Monitoring for DMA Done
Common DMA Problems
D/A Conversions (ADA1200 Only)
Example Programs and Flow Diagrams
Single Convert Flow Diagram (Figure 44)
DMA Flow Diagram (Figure 4-5)
Interrupts Flow Diagram (Figure 4-6)
D/A Conversion Flow Diagram (Figure 4-7)
Chapter 5 Calibration
APPENDIX A - 12OO SPECIFICATIONS A-L
Appendix B - P2 Connector Pin Assignments
Appendix C - Component Data Sheets
Appendix D _ Configuring the 12Oo for Signal Math
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