National Instruments DIO 6533 Chapter 3 Hardware Overview, Chapter 4 Signal Connections

Table of Contents
DIO 6533 User Manual vi
© National Instruments Corporation
AT Device Configuration.............................................................................................2-5
Bus Interface..................................................................................................2-5
Plug and Play Mode.........................................................................2-5
Switchless Data Acquisition............................................................2-5
Base I/O Address Selection...............................................2-6
DMA Channel Selection................................................... 2-6
Interrupt Channel Selection...............................................2-6
Chapter 3
Hardware Overview
Unstrobed I/O...............................................................................................................3-4
Strobed I/O—Pattern Generation and Handshaking.................................................... 3-5
Pattern and Change Detection........................................................................3-6
Pattern-Detection Triggers.............................................................. 3-6
Change Detection............................................................................ 3-7
Message Generation........................................................................ 3-8
Handshaking Protocols.................................................................................. 3-8
8255 Emulation................................................................................3-9
Level ACK.......................................................................................3-9
Leading-Edge Pulse.........................................................................3-9
Long Pulse.......................................................................................3-9
Trailing-Edge Pulse.........................................................................3-9
Burst Mode......................................................................................3-10
Comparing Protocols......................................................................................3-10
Starting a Handshaking Transfer....................................................................3-12
Controlling the Startup Sequence....................................................3-12
Controlling Line Polarities.............................................................. 3-13
Transfer Rates...............................................................................................................3-13
Chapter 4
Signal Connections
I/O Connector...............................................................................................................4-1
Signal Descriptions........................................................................................4-3
Signal Characteristics...................................................................... 4-6
Control Signal Summary.................................................................4-7
RTSI Bus Interface.........................................................................................4-7
Board and RTSI Clocks...................................................................4-8
RTSI Triggers..................................................................................4-8
Data Signal Connections..............................................................................................4-9
Unstrobed I/O.................................................................................................4-10
Strobed I/O.....................................................................................................4-12