National Instruments 653X - Manual (Page 8)

Contents
653X User Manual viii ni.com
Choosing Whether or Not to Use a Programmable Delay .............................. 2-8
Choosing Continuous or Finite Data Transfer ................................................ 2-9
Finite Transfers................................................................................. 2-9
Continuous Input .............................................................................. 2-9
Continuous Output............................................................................ 2-9
Choosing DMA or Interrupt Transfers ............................................. 2-10
Connecting Signals ......................................................................................... 2-10
Choosing the Startup Sequence....................................................................... 2-11
Using an Initialization Order ............................................................ 2-11
Controlling Line Polarities ............................................................... 2-12
Creating a Program ......................................................................................... 2-12
Generating and Receiving Digital Patterns and Waveforms—Pattern I/O ................... 2-17
Deciding the Width of Data to Transfer.......................................................... 2-17
Deciding Transfer Direction ........................................................................... 2-18
Choosing an Internal or External REQ Source ............................................... 2-18
Deciding the REQ Polarity ............................................................................. 2-18
Deciding the Transfer Rate ............................................................................. 2-18
Deciding How to Start and Stop Data Transfer—Triggering ......................... 2-19
Start and Stop Trigger....................................................................... 2-20
Choosing Continuous or Finite Data Transfer ................................................ 2-21
Finite Transfers................................................................................. 2-21
Continuous Input .............................................................................. 2-21
Continuous Output............................................................................ 2-22
Choosing DMA or Interrupt Transfers ............................................. 2-22
Monitoring Data Transfer ............................................................................... 2-23
Connecting Signals ......................................................................................... 2-23
Creating a Program ......................................................................................... 2-24
Monitoring Line State—Change Detection................................................................... 2-26
Deciding the Width of Data to Acquire .......................................................... 2-26
Deciding Which Lines You Want to Monitor................................................. 2-27
Deciding How to Start and Stop Data Transfer—Triggering ......................... 2-27
Start and Stop Trigger....................................................................... 2-28
Choosing Continuous or Finite Data Transfer ................................................ 2-30
Finite Transfers................................................................................. 2-30
Continuous Input .............................................................................. 2-30
Choosing DMA or Interrupt Transfers ............................................. 2-31
Connecting Signals ......................................................................................... 2-31
Creating a Program ......................................................................................... 2-31
Chapter 3
Timing Diagrams
Pattern I/O Timing Diagrams ........................................................................................ 3-1
Internal REQ Signal Source ............................................................................ 3-1