multifunction-rio-user-manual.pdf - 第19页

© National Instruments Corporation 2-1 Mult ifunction Reconfigurable I/O User Manual 2 Hardware Over view of the NI 78 xx This chapter presents an overview of the hardware functions and I/O connectors on the Reconfigurab…

Chapter 1 Introduction

ships with a wire list identifying the wires that correspond to each NI-78xx

pin. You can use this cable to quickly connect the NI 78xx signals that you

need to the connector of your choice. Refer to Appendix A, Connecting I/O

Signals, for the NI 78xx connector pinouts.

Hardware Overview

of the NI 78xx

This chapter presents an overview of the hardware functions and

I/O connectors on the Reconfigurable I/O (RIO) devices.

Figure 2-1 shows a block diagram for the NI 781x. Figure 2-2 shows a

block diagram for the NI 7830. Figure 2-3 shows a block diagram for the

NI 7831/7833/784x/785x.

Figure 2-1. NI 781x Block Diagram

Configuration

Configuration Control

Connector 0 (DIO)Connector 1 (DIO)Connector 2 (DIO)Connector 3 (DIO)

Digital I/O (40)

User-Configurable

FPGA on

RIO Devices

Digital I/O (40)

Data/Address/Control

Bus

Interface

Address/Data

Control

Flash Memory

PCI/PXI/CompactPCI Bus

RTSI/PXI Triggers

PXI Local Bus (NI PXI-781x Only)

RTSI Bus

Chapter 2 Hardware Overview of the NI 78xx

Multifunction Reconfigurable I/O User Manual 2-2 ni.com

Figure 2-2. NI 7830 Block Diagram

RTSI/PXI Triggers

PXI Local Bus (NI PXI-7830 only)

Connector 0 (MIO)

Connector 1 (DIO)

Input Mode Mux

AISENSE

AIGND

Calibration

Mux

Voltage

Reference

Temperature

Sensor

Calibration

DACs

x4 Channels

16-Bit

DAC

Digital I/O (16)

User-

Configurable

FPGA on RIO

Devices

Bus

Interface

Data/Address/

Control

Address/Data

Flash

Memory

Configuration

Control

Configuration

PCI/PXI/CompactPCI Bus

16-Bit

ADC

Calibration

DACs

Input Mux

Digital I/O (40)

RTSI Bus

x4 Channels

Instrumentation

Amplifier

AI–

AI+

–