Hardware Manual - RTD Embedded Technologies, Inc.

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JS1, JS2, JS3, and JS4—Pull-Up/Pull-Down Resistors on Digital I/O Lines The DM6425HR has 32 TTL/CMOS compatible digital I/O lines that can be interfaced with external devices. These lines are divided into four groups: Port 0 has eight bit programmable lines, advanced interrupt modes, and bit masking, Port 1 is byte direction programmable, Port 2 is output, and Port 3 is latched input. Resistors are connected to these lines and can be configured as either pull-up or pull-down resistors. 10 kΩ pull-up/pull-down resistors are installed on the DM6425HR, and a solder connection must be made on the bottom of the board to configure their operation. The solder connections are made at JS1 for Port 0, JS2 for Port 1, JS3 for Port 3, and JS4 for Port 2. The factory default is pull-up for all ports. This is done by placing a solder short between the middle (common) pad and V (+5 V). To configure the resistors as pull-down resistors, remove the existing solder connection and make one between the middle (common) pad and G (ground). To disable the pull-up/pull-down resistor, remove the solder connection. WARNING Do not solder all three pads; doing so will damage the board! G G V V Figure 10 JS1 and JS2 Pull-Up/Pull-Down Resistor Connections V V G G Figure 11 JS3 and JS4 Pull-Up/Pull-Down Resistor Connections 18 DM6425HR dataModule BDM-610010034 Rev C
Chapter 3 Installing the dataModule This chapter provides instructions to install your DM6425HR with an <strong>RTD</strong> cpuModule or other PC/104 based system. After completing the installation, <strong>RTD</strong> recommends using the diagnostic software included in your DM6425HR package to fully verify that your module is working. BDM-610010034 Rev C Chapter 3: Installing the dataModule 19
Page 1 and 2: DM6425HR 32-Channel, 500 kHz PC/104
Page 3 and 4: DM6425 32-Channel, 500 kHz PC/104 d
Page 5 and 6: Table of Contents Chapter 1 Introdu
Page 7 and 8: A/D Conversion Modes . . . . . . .
Page 9 and 10: D/A Calibration. . . . . . . . . .
Page 11 and 12: Chapter 1 Introduction The DM6425HR
Page 13 and 14: DM6425HR Ordering Information The D
Page 15 and 16: Features The DM6425HR is a 12-bit,
Page 17 and 18: Analog-to-Digital Conversion The DM
Page 19 and 20: 8254 Timer/Counters Two 8254 progra
Page 21 and 22: For More Information This manual an
Page 23 and 24: Chapter 2 DM6425HR Module Settings
Page 25 and 26: JS1 JS2 JS3 JS4 Figure 6 DM6425HR S
Page 27: Base Address Jumper (Factory Settin
Page 31 and 32: Installation Considerations Conside
Page 33 and 34: External I/O Connections Figure 13
Page 35 and 36: Connecting the Analog Input Pins Th
Page 37 and 38: I/O CONNECTOR (CN3) SIGNAL SOURCE 1
Page 39 and 40: Chapter 4 I/O Mapping This chapter
Page 41 and 42: BDM-610010034 Rev C Chapter 4: I/O
Page 53 and 54: Load Channel-Gain Table in Channel-
Page 55 and 56: This register sets up the trigger m
Page 57 and 58: BA + 0x0Ah (10): Digital Input FIFO
Page 59 and 60: BA + 0x18h (24): Digital I/O Port 0
Page 61 and 62: BA + 0x1Eh (30): Digital IRQ Status
Page 63 and 64: BA + 0x408h (1032): DAC3 Update Reg
Page 65 and 66: BA + 0x41Ch (1052): Read/Program Po
Page 67 and 68: BA + 0x800h/801h (2048/2049): Board
Page 69 and 70: Setting or clearing more than one b
Page 71 and 72: Chapter 5 A/D Conversions This chap
Page 73 and 74: Programming Channel, Gain, Input Ra
Page 75 and 76: Pause Bit Bit 11 is used as a pause
Page 77 and 78: With BA + 0x00h, bits 1 and 0 set t
Page 79 and 80:
TO A/D CONVERTER A/D CONVERSION SEL
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Trigger Repeat Function Bit 13 in t
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Programmable Burst In this mode, a
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Voltage values for each bit will va
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Programming Steps The pacer clock i
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Using the Sample Counter to Create
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Mathematical formula for calculatin
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Chapter 6 Data Transfers Using DMA
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Allocating a DMA Buffer When using
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Setting the DMA Page Register Oddly
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Programming the DM6425HR for DMA On
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Chapter 7 Interrupts This chapter e
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CLOCK DIGITAL INPUT IRQ OUT Figure
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If you find yourself intimidated by
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Restoring the Startup IMR and Inter
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Chapter 8 D/A Conversions This chap
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Chapter 9 Timer/Counters This chapt
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Each timer/counter has two inputs,
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Chapter 10 Digital I/O This chapter
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When using event interrupts, you ca
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Appendix A Example Programs This ap
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Special Considerations When manipul
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Appendix B Calibration This appendi
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A/D Calibration Two procedures are
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Below is a table listing the ideal
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Appendix C Specifications This appe
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Table 11 DM6425HR Specifications (c
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Appendix D I/O Connector Pin Assign
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Mating Connector Part Numbers Manuf
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Appendix E IDAN Dimensions and Pino
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IDAN-DM6425HR-62S External I/O Conn
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IDAN-DM6425HR-68S External I/O Conn
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Appendix F Limited Warranty RTD Emb
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