National Instruments 3.21E+04 STARTSCAN Signal

Chapter 4 Signal Connections

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National Instruments Corporation 4-37 AT-MIO/AI E Series User Manual

Figure 4-20. TRIG2 Output Signal Timing

STARTSCAN Signal

Any PFI pin can externally input the STARTSCAN signal, which is

available as an output on the PFI7/STARTSCAN pin.

Refer to Figures 4-13 and 4-14 for the relationship of STARTSCAN to

the data acquisition sequence.

As an input, the STARTSCAN signal is configured in the

edge-detection mode. You can select any PFI pin as the source for

STARTSCAN and configure the polarity selection for either rising or

falling edge. The selected edge of the STARTSCAN signal initiates a

scan. The sample interval counter is started if you select internally

triggered CONVERT*.

As an output, the STARTSCAN signal reflects the actual start pulse that

initiates a scan. This is true even if the starts are being externally

triggered by another PFI. You have two output options. The first is an

active high pulse with a pulse width of 50 to 100 ns, which indicates the

start of the scan. The second action is an active high pulse that

terminates at the start of the last conversion in the scan, which indicates

a scan in progress. STARTSCAN will be deasserted toff after the last

conversion in the scan is initiated. This output is set to tri-state at

startup.

tw

tw= 50-100 ns

Contents

Main Page Important Information Warranty Copyright Trademarks WARNING REGARDING MEDICAL AND CLINICAL USE OF NATIONAL INSTRUMENTS PRODUCTS About This Manual Chapter 1 Introduction Chapter 2 Installation and Configuration Table of Contents Chapter 3 Hardware Overview Chapter 4 Signal Connections Chapter 5 Calibration Page Page Tables About This Manual Organization of This Manual About This Manual Conventions Used in This Manual National Instruments Documentation Related Documentation Customer Communication Introduction About the AT E Series What You Need to Get Started Software Programming Choices LabVIEW and LabWindows/CVI Application Software NI-DAQ Driver Software Page Register-Level Programming Optional Equipment Custom Cabling Unpacking Installation and Configuration Software Installation Hardware Installation Board Configuration Bus Interface Plug and Play Switchless Data Acquisition Base I/O Address Selection DMA Channel Selection Interrupt Channel Selection Chapter 2 Installation and Conguration National Instruments Corporation 2-5 AT-MIO/AI E Series User Manual Table 2-1. PC AT I/O Address Map (Continued) Chapter 2 Installation and Conguration AT-MIO/AI E Series User Manual 2-6 National Instruments Corporation Table 2-2. PC AT Interrupt Assignment Map Page Hardware Overview National Instruments Corporation 3-1 AT-MIO/AI E Series User Manual DAQ - STC AT I/O Channel RTSI Bus Figure 3-2 shows the block diagram for the AT-MIO-64E-3. DAQ - STC RTSI Bus I/O Connector AT I/O Channel Figure 3-3 shows the block diagram for the AT-MIO-16E-10 and AT-MIO-16DE-10. DAQ - STC RTSI Bus I/O Connector AT I/O Channel Figure 3-4 shows a block diagram for the AT-MIO-16XE-10. Data (16) Figure 3-4. AT-MIO-16XE-10 Block Diagram Trigger Level DACs Analog Circuitry Figure 3-5 shows a block diagram for the AT-AI-16XE-10. Circuitry Figure 3-5. AT-AI-16XE-10 Block Diagram Trigger Level DACs Analog AT-MIO/AI E Series User Manual 3-6 Analog Input Input Mode Input Polarity and Input Range Page Page Considerations for Selecting Input Ranges Dither AT-MIO/AI E Series User Manual 3-12 National Instruments Corporation Figure 3-7. Dither Multiple-Channel Scanning Considerations a. Dither disabled; no averaging b. Dither disabled; average of 50 acquisitions d. Dither enabled; average of 50 acquisitions c. Dither enabled; no averaging Page Analog Output Analog Output Reference Selection Analog Output Polarity Selection Analog Output Reglitch Selection Analog Trigger Page Page Page Digital I/O Timing Signal Routing Programmable Function Inputs Board and RTSI Clocks RTSI Triggers AT-MIO/AI E Series User Manual 3-22 National Instruments Corporation Figure 3-15. RTSI Bus Signal Connection Signal Connections I/O Connector AT-MIO/AI E Series User Manual 4-2 National Instruments Corporation Figure 4-2. I/O Connector Pin Assignment for the AT-MIO-64E-3 National Instruments Corporation 4-3 AT-MIO/AI E Series User Manual Figure 4-3. I/O Connector Pin Assignment for the AT-MIO-16DE-10 AT-MIO/AI E Series User Manual 4-4 National Instruments Corporation National Instruments Corporation 4-5 AT-MIO/AI E Series User Manual I/O Connector Signal Descriptions AT-MIO/AI E Series User Manual 4-6 National Instruments Corporation National Instruments Corporation 4-7 AT-MIO/AI E Series User Manual AT-MIO/AI E Series User Manual 4-8 National Instruments Corporation Table 4-1 shows the I/O signal summary for the AT-MIO-16E-1, AT-MIO-16E-2 and AT-MIO-64E-3. Table 4-1. I/O Signal Summary, AT-MIO-16E-1, AT-MIO-16E-2, and AT-MIO-64E-3 National Instruments Corporation 4-9 AT-MIO/AI E Series User Manual Table 4-1. I/O Signal Summary, AT-MIO-16E-1, AT-MIO-16E-2, and AT-MIO-64E-3 (Continued) AT-MIO/AI E Series User Manual 4-10 National Instruments Corporation Table 4-2 shows the I/O signal summary for the AT-MIO-16E-10 and AT-MIO-16DE-10. Table 4-2. I/O Signal Summary, AT-MIO-16E-10 and AT-MIO-16DE-10 National Instruments Corporation 4-11 AT-MIO/AI E Series User Manual Table 4-2. I/O Signal Summary, AT-MIO-16E-10 and AT-MIO-16DE-10 (Continued) AT-MIO/AI E Series User Manual 4-12 National Instruments Corporation Table 4-3 shows the I/O signal summary for the AT-MIO-16XE-10 and AT-AI-16XE-10. Table 4-3. I/O Signal Summary, AT-MIO-16XE-10 and AT-AI-16XE-10 National Instruments Corporation 4-13 AT-MIO/AI E Series User Manual Table 4-3. I/O Signal Summary, AT-MIO-16XE-10 and AT-AI-16XE-10 (Continued) AT-MIO/AI E Series User Manual 4-14 National Instruments Corporation Table 4-4 shows the I/O signal summary for the AT-MIO-16XE-50. Table 4-4. I/O Signal Summary, AT-MIO-16XE-50 National Instruments Corporation 4-15 AT-MIO/AI E Series User Manual Table 4-4. I/O Signal Summary, AT-MIO-16XE-50 (Continued) Analog Input Signal Connections - Types of Signal Sources Floating Signal Sources Ground-Referenced Signal Sources Input Configurations National Instruments Corporation 4-19 AT-MIO/AI E Series User Manual Figure 4-5 summarizes the recommended input configuration for both types of signal sources. Figure 4-5. Summary of Analog Input Connections Differential Connection Considerations (DIFF Input Configuration) National Instruments Corporation 4-21 AT-MIO/AI E Series User Manual Differential Connections for Ground-Referenced Signal Sources Figure 4-6. Differential Input Connections for Ground-Referenced Signals Differential Connections for Nonreferenced or Floating Signal Sources Page Single-Ended Connection Considerations Single-Ended Connections for Floating Signal Sources (RSE Configuration) Single-Ended Connections for Grounded Signal Sources (NRSE Configuration) Common-Mode Signal Rejection Considerations Analog Output Signal Connections Digital I/O Signal Connections Page Power Connections Timing Connections Programmable Function Input Connections Data Acquisition Timing Connections SCANCLK Signal EXTSTROBE* Signal TRIG1 Signal Page TRIG2 Signal STARTSCAN Signal AT-MIO/AI E Series User Manual 4-38 National Instruments Corporation Figures 4-21 and 4-22 show the input and output timing requirements for the STARTSCAN signal Figure 4-21. STARTSCAN Input Signal Timing b. Scan in Progress, Two Conversions per Scan Figure 4-22. STARTSCAN Output Signal Timing a. Start of Scan CONVERT* Signal Page AIGATE Signal SISOURCE Signal Waveform Generation Timing Connections WFTRIG Signal UPDATE* Signal Page UISOURCE Signal General-Purpose Timing Signal Connections GPCTR0_SOURCE Signal GPCTR0_GATE Signal GPCTR0_OUT Signal GPCTR0_UP_DOWN Signal GPCTR1_SOURCE Signal GPCTR1_GATE Signal GPCTR1_OUT Signal National Instruments Corporation 4-51 AT-MIO/AI E Series User Manual GPCTR1_UP_DOWN Signal Figure 4-37. GPCTR Timing Summary FREQ_OUT Signal Timing Specifications for Digital I/O Ports A, B, and C Page Mode 1 Input Timing Mode 1 Output Timing Mode 2 Bidirectional Timing Field Wiring Considerations Calibration Loading Calibration Constants Self-Calibration External Calibration Other Considerations Specifications A AT-MIO-16E-1, AT-MIO-16E-2 and AT-MIO-64E-3 Page Page Page Page Page Page Page Analog Trigger Page AT-MIO-16E-10 and AT-MIO-16DE-10 Page Page Page Page Appendix A Specications for AT-MIO-16E-10 and AT-MIO-16DE-10 AT-MIO/AI E Series User Manual A-16 National Instruments Corporation Handshaking (AT-MIO-16DE-10 only)................3-wire Digital logic levels............ PA<0..7>, PB<0..7>, PC<0..7> ....................... Digital Trigger RTSI Bus Interface Page AT-MIO-16XE-10 and AT-AI-16XE-10 Page Page Analog Output (AT-MIO-16XE-10 only) Page Analog Trigger Page AT-MIO-16XE-50 Page Page Page Page Page Optional Cable Connector Descriptions B Figure B-1. 68-Pin MIO Connector Pin Assignments AT-MIO/AI E Series User Manual B-2 National Instruments Corporation National Instruments Corporation B-3 AT-MIO/AI E Series User Manual Figure B-2. 68-Pin DIO Connector Pin Assignments AT-MIO/AI E Series User Manual B-4 National Instruments Corporation Figure B-3. 68-Pin Extended Analog Input Connector Pin Assignments National Instruments Corporation B-5 AT-MIO/AI E Series User Manual Figure B-4. 50-Pin MIO Connector Pin Assignments AT-MIO/AI E Series User Manual B-6 National Instruments Corporation Figure B-5. 50-Pin DIO Connector Pin Assignments National Instruments Corporation B-7 AT-MIO/AI E Series User Manual Figure B-6. 50-Pin Extended Analog Input Connector Pin Assignments Common Questions C General Information Installation and Configuration Analog Input and Output Page Timing and Digital I/O Page Page Page Customer Communication D Electronic Services Bulletin Board Support FTP Support Fax and Telephone Support Telephone Fax FaxBack Support E-Mail Support (currently U.S. only) Technical Support Form AT E Series Hardware and Software Configuration Form National Instruments Products Other Products Documentation Comment Form Title: Edition Date: Part Number: Mail to: Technical Publications Fax to: Symbols Glossary A B C D E F Page Page T U V W Index Symbols A Page B C D Page E F G H I L M N O P Page Q R S Page Page T U V W