National Instruments AT-MIO-16 User Manual

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National Instruments AT-MIO-16 User Manual Manual pdf 18 page image

Chapter 2 Configuration and Installation© National Instruments Corporation 2-3 AT-MIO-16 User ManualNote: The parts locator diagram shown in Figure 2-1 is for revision D and subsequentrevisions of the AT-MIO-16 board. See Appendix B, Revisions A through C PartsLocator Diagram, for earlier revisions of the AT-MIO-16 board. The remainder of thischapter applies to all revisions of the AT-MIO-16 board.In the configuration illustrations throughout this chapter, the black bars on the jumper diagramsindicate where to place jumpers. On the switch diagrams, the shaded portion indicates the side ofthe switch that is pressed down.Base I/O Address SelectionThe switches at position U61 determine the base I/O address for the AT-MIO-16, as shown inFigure 2-1. Each switch in U61 corresponds to one of the address lines A9 through A5. Pressthe side marked OFF to select a binary value of 1 for the corresponding address bit. Press theother side of the switch to select a binary value of 0 for the corresponding address bit. Figure 2-2shows two possible switch settings.Note: Verify that other equipment installed in your computer does not already occupy theAT-MIO-16 address space. If any equipment in your computer uses this base I/Oaddress space, you must change the base I/O address of either the AT-MIO-16 or thatof the other device. If you change the AT-MIO-16 base I/O address, you must makea corresponding change to any software you use with the AT-MIO-16. For moreinformation about the I/O address of your PC AT, refer to the technical referencemanual for your computer.This side down for 0 This side down for 0U611 2 3 4 5A9A8A7A6A5U611 2 3 4 5A9A8A7A6A5This side down for 1 This side down for 1a. Switches Set to Base I/OAddress of Hex 000 b. Switches Set to Base I/O Address of Hex220 (Factory Setting)Figure 2-2. Example Base I/O Address Switch SettingsTo change the base I/O address, remove the plastic cover on U61; press each switch to thedesired position; check each switch to make sure the switch is pressed down all the way; andreplace the plastic cover. Make a note of the new AT-MIO-16 base I/O address on theconfiguration form in Appendix C, Customer Communication, to use when configuring thesoftware you are using with the AT-MIO-16. Table 2-2 lists the possible switch settings, thecorresponding base I/O address, and the base I/O address space for each setting.