National Instruments 3.21E+04 用户手册

Chapter 3     Hardware Overview

AT-MIO/AI E Series User Manual

3-6

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 National Instruments Corporation

Figure 3-6 shows a block diagram for the AT-MIO-16XE-50.

Figure 3-6.  AT-MIO-16XE-50 Block Diagram

The analog input section of each AT E Series board is software 
configurable.  You can select different analog input configurations 
through application software designed to control the AT E Series 
boards.  The following sections describe in detail each of the analog 
input categories.

The AT E Series boards have three different input modes—
nonreferenced single-ended (NRSE) input, referenced single-ended 
(RSE) input, and differential (DIFF) input.  The single-ended input 
configurations use up to 16 channels (64 channels on the 
AT-MIO-64E-3).  The DIFF input configuration uses up to eight 
channels (32 channels on the AT-MIO-64E-3).  Input modes are 

Timing

PFI / Trigger

I/O Connector

3

2

RTSI Bus

AT – I/O Channel

Digital I/O (8)

16-Bit

Sampling

A/D

Converter

EEPROM

Configuration

Memory

+

Programmable
Gain
Amplifier
–

Calibration

Mux

Mux Mode
Selection
Switches

Analog

Muxes

Voltage

REF

Calibration

DACs

4

Calibration

DACs

DAC0

DAC1

3

Analog Input

Timing/Control

Analog Output
Timing/Control

Digital I/O

Trigger

Counter/

Timing I/O

RTSI Bus

Interface

DMA/

Interrupt
Request

Bus

Interface

(8)

(8)

8

AI Control

Analog

Input

Control

EEPROM

Control

DMA

Interface

DAQ-STC

Bus

Interface

Plug

and

Play

Analog
Output
Control

8255

DIO

Control

Bus

Interface

IRQ
DMA

Data

Transceivers 

AO Control

ADC

FIFO

Data (16)

Data (16)