National Instruments PCI-DIO-96 User Manual

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National Instruments PCI-DIO-96 User Manual Manual pdf 23 page image

Chapter 3 Signal ConnectionsPCI-DIO-96/PXI-6508/PCI-6503 User Manual 3-8 ni.comNote Table 3-3 shows both the port C signal assignments and the terminology correlationbetween different documentation sources. The 82C55A terminology refers to the different82C55A configurations as modes whereas NI-DAQmx, Traditional NI-DAQ (Legacy),LabWindows/CVI, and LabVIEW documentation refers to them as handshaking and nohandshaking. On the PCI-DIO-96 and PXI-6508, these signal assignments are the same forall four 82C55A PPIs. Refer to Table 3-1 for more information.Digital I/O Signal ConnectionsPins 1 through 48 and, on the PCI-DIO-96 and PXI-6508, pins 51 through98 of the I/O connector are digital I/O signal pins. The followingspecifications and ratings apply to the digital I/O lines. The maximum inputlogic high and output logic high voltages assume a V cc supply voltage of5.0 V.The absolute maximum voltage rating is −0.5 to +5.5 V with respect toGND. For more information on the digital I/O signal specifications, refer toAppendix A, Specifications.Table 3-3. Port C Signal AssignmentsConfiguration Terminology Signal Assignments82C55A/PCI-DIO-96/PXI-6508/PCI-6503User ManualNationalInstrumentsSoftwareAPC7,BPC7,CPC7,orDPC7APC6,BPC6,CPC6,orDPC6APC5,BPC5,CPC5,orDPC5APC4,BPC4,CPC4,orDPC4APC3,BPC3,CPC3,orDPC3APC2,BPC2,CPC2,orDPC2APC1,BPC1,CPC1,orDPC1APC0,BPC0,CPC0,orDPC0Mode 0(Basic I/O)NoHandshakingI/O I/O I/O I/O I/O I/O I/O I/OMode 1(Strobed Input)Handshaking I/O I/O IBF A STB A * INTR A STB B* IBFB B INTR BMode 1(StrobedOutput)Handshaking OBF A* ACKA * I/O I/O INTR A ACK B* OBF B* INTR BMode 2(BidirectionalBus)Handshaking OBF A* ACKA * IBF A STB A * INTR A I/O I/O I/ONotes: Indicates that the signal is active low.Subscripts A and B denote port A or port B handshaking signals.