HP NuDAQ I-9111DG/HR manual 3 A/D Trigger Source Control, Signal Range

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Signal Range

The proper signal range is important for data acquisition. The input signal may be saturated if the A/D gain is too large. Sometimes, the resolution may be not enough if the signal is small. The maximum A/D signal range of PCI-9111 is +/- 10 volts when the A/D gain value is 1. The A/D gain control register controls the maximum signal input range. The signal gain is programmable with 5 levels (1, 2, 4, 8, 16). The signal range of the 16 channels will be identical all the time even if the channel number is scanning.

The available signal polarity on PCI-9111 is bi-polar but no uni-polar configuration. However, the bi-polar input range still covers the uni-polar applications. In addition the high resolution of the PCI-9111HR can cover the normal industry applications. Therefore, PCI-9111 is suitable for full range of applications.

4.1.3A/D Trigger Source Control

The A/D conversion is starting by a trigger source, and then the A/D converter will start to convert the signal to a digital value. In the PCI-9111, A/D conversion can be triggered by the Internal or External trigger source. The EITS bit of A/D control register is used to handle the internal or external trigger, please refer to section 3.8 for details. Whenever the external source is set, the internal sources are disabled.

If the internal trigger is selected, two internal sources can be selected: the software trigger or the timer pacer trigger. The A/D operation mode is controlled by A/D mode bits (EITS, TPST) of A/D mode register. Total three trigger sources are provided in the PCI-9111. The different trigger conditions are specified as follows:

Software trigger (EITS=0, TPST=0)

The trigger source is software controllable in this mode. That is, the A/D conversion is starting when any value is written into the software trigger register. This trigger mode is suitable for low speed A/D conversion. Under this mode, the timing of the A/D conversion is fully controlled by software. However, it is difficult to control the fixed A/D conversion rate unless another timer interrupt service routine is used to generate a fixed rate trigger. Refer to interrupt control section for fixed rate timer interrupt.

Timer Pacer Trigger (EITS=0, TPST=1)

An on-board timer / counter chip 8254 is used to provide a trigger source for A/D conversion at a fixed rate. Two counters of the 8254 chip are cascaded together to generate trigger pulse with precise period. Please

Operation Theorem ∙25

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Contents NuDAQ Trademarks Questions Getting service from AdlinkPage PCI PnP Registers Address Map Features Applications Specifications Software SupportingB l e o f C o n t e n t s Interrupt Control Libraries Installation Programming GuideHardware Interrupt Clear Register ConversionTable of Contents ∙ 9111util What do you need VR Assignment AdjustmentHow to Use This Guide Page Introduction FeaturesApplications SpecificationsUnipolar 0~10V Bipolar -10V~+10V Programming Library Software SupportingDASYLabTM PRO PCIS-LVIEW LabVIEW DriverPCIS-VEE HP-VEE Driver DAQBenchTM ActiveX ControlsPCIS-OPC OPC Server PCIS-ICL InControlTM DriverUnpacking Installation∙ Software Installation Guide What You HavePCB Layout of the PCI-9111 PCI-9111s LayoutJumper Descriptions Hardware Installation Outline∙ CN 1 Digital Signal Input DI 0 ~ Device Installation for Windows SystemsConnectors Pin Assignment ∙ CN 3 Analog Input/Output, Extended I/O, Trigger Signals ∙ CN 2 Digital Signal Output do 0 ~Connect with ACLD-9182 Daughter Board ConnectionConnect with ACLD-8125 Connect with ACLD-9137PCI PnP Registers Registers FormatI/O Address I/O Address MapA/D Data Registers Address Write ReadAddress Base + 6h Attribute write only Data Format Bit A/D Channel Control RegisterAddress Base + 0h Attribute read only Data Format BitAddress Base + 8h Attribute write only Data Format Bit A/D Input Signal Range Control RegisterA/D Channel Read Back Register Address Base + 6h Attribute read only Data Format BitAddress Base + 0Ah Attribute write only Data Format Bit A/D Trigger Mode Control RegisterA/D Range and Status Read back Register Address Base + 8h Attribute read only Data Format BitAddress Base + 0Ch Attribute write only Data Format Bit Mode DescriptionAddress Base + 0Eh Attribute write only Data Format Bit Address Base + 0Ah Attribute read only Data Format Bit 12 A/D Mode & Interrupt Control Read Back RegisterHardware Interrupt Clear Register Address Base + 48h Attribute write only Data Format BitAddress Base + 2h Attribute read only Data Format Address Base + 4h Attribute write only Data Format BitAddress Base + 4h Attribute read only Data Format Bit Address Base + 40h ~ Base + 46h 15 D/A Output RegisterAddress Base + 2h Attribute write only Data Format Bit A/D Conversion Operation Theorem2 A/D Signal Source Control 1 A/D Conversion ProcedureAnalog Input Signal Connection 3 A/D Trigger Source Control Signal RangeExternal Trigger EITS=1, TPST=don‘t care 4 A/D Data Transfer ModesFifo Half-Full Polling EOC Interrupt Transfer Pre-Trigger ControlTime FFF 6 A/D Data FormatDual Interrupt System IRQ Level SettingInterrupt Control System Architecture Extended Digital I/O Port Interrupt Source Control44mV 88mV D/A ConversionDigital Input and Output Timer/Counter Operation Introduction4 I/O Address Pacer Trigger SourcePre-Trigger Counter ++ Library Libraries InstallationData Types Programming Guide Naming Convention++ Windows 9111Initial9111DO ++ DOS9111DI 9111DOChannel9111EDI 9111DIChannel10 9111EDOReadBack 9111EDO11 9111SetEDOFunction 13 9111ADReadData 12 9111DA15 9111ADSetChannel 14 9111ADReadDataRepeat16 9111ADGetChannel Input Range Gain Gain Code 17 9111ADSetRange19 9111ADGetStatus 18 9111ADGetRange20 9111ADSetMode 22 9111INTSetReg 21 9111ADGetMode23 9111INTGetReg 24 9111ResetFIFO26 9111Set8254 25 9111ADSoftTrigger27 9111Get8254 28 9111ADTimer30 9111CounterRead 29 9111CounterStart31 9111CounterStop 32 9111INTSourceControl 34 9111GetIRQChannel 33 9111CLRIRQ36 9111ADFFHFPolling 35 9111GetIRQStatus38 9111ADHRAquire 37 9111ADAquire39 9111ADINTStart 40 9111ADFFHFINTStart ++ Library ∙61 42 9111ADFFHFINTStatus 41 9111ADINTStatus43 9111ADFFHFINTRestart 44 9111ADINTStop What do you need CalibrationFunctions of VRs A/D AdjustmentVR Assignment Bipolar Analog Output D/A Adjustment Unipolar Analog OutputRunning 9111util.exe Software Utility9111util System Configuration Calibration Function Testing Menu Window Functional TestingIeeprom Product Warranty/Service
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