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653X
Figure 3-10. 8255 Emulation Input State Machine
1
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147 pages, 1.13 Mb
Chapter 3
Timing Diagrams
653X User Manual
3-14
ni.com
Figure 3-10.
8255 Emulation Input State Machine
Wait
For
Space
Wait
For
REQ
Programmable
Delay
Wait
For
REQ
When REQ Unasserted,
Latch Input Data
When 6533 Device has
space for data, input data.
Clear
ACK
When REQ
Asserted
Initial State:
ACK Set
Send
ACK
Contents
Main
Page
Important Information
Warranty
Copyright
Trademarks
WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS
Compliance
FCC/Canada Radio Frequency Interference Compliance*
Determining FCC Class
FCC/DOC Warnings
Class A
European Union - Compliance to EEC Directives
Conventions
Contents
Chapter 1 Getting Started with Your 653X
Chapter 2 Using Your 653X
Chapter 3 Timing Diagrams
Page
Getting Started with Your 653X
653X Device Overview
Control Lines
What You Need to Get Started
Choosing Your Programming Software
National Instruments Application Software
NI-DAQ Driver Software
Installing Your Software
Unpacking Your 653XDevice
Installing Your 653XDevice
Installing the PCI-DIO-32HS, PCI-6534, or PCI-7030/6533
Installing the PXI-6533, PXI-6534, or PXI-7030/6533
Installing the AT-DIO-32HS
Installing the DAQCard-6533 for PCMCIA
Configuring the 653X
In Windows
In Mac OS
Using Your 653X
Choosing the Correct Mode for Your Application
Controlling and Monitoring Static Digital LinesUnstrobed I/O
Configuring Digital Lines
Standard Output
Wired-OR Output
Using Control Lines as Extra Unstrobed Data Lines
Page
Programming the Control/Timing Lines as Extra Unstrobed Data Lines
Transferring Data Between Two DevicesHandshaking I/O
Deciding the Width of Data to Transfer
Deciding Data Transfer Direction
Deciding Which Handshaking Protocol to Use
Using the Burst Protocol
Deciding the PCLK Signal Direction
Selecting ACK/REQ Signal Polarity
Choosing Whether or Not to Use a Programmable Delay
Continuous Output
Page
Choosing the Startup Sequence
Using an Initialization Order
Controlling Line Polarities
Chapter 2 Using Your 653X
Figure 2-4. Programming Buffered Handshaking I/O in NI-DAQ
National Instruments Corporation 2-13 653X User Manual
Figure 2-5. Programming Unbuffered Handshaking I/O in NI-DAQ
Figure 2-6. Programming Handshaking Input inLabVIEW/LabVIEW RT
Figure 2-7. Programming Handshaking Output in LabVIEW/LabVIEW RT
Generating and Receiving Digital Patterns and Waveform sPattern I/O
Deciding the Width of Data to Transfer
Deciding Transfer Direction
Choosing an Internal or External REQ Source
Deciding the REQ Polarity
Deciding the Transfer Rate
Deciding How to Start and Stop Data TransferTriggering
Start Trigger
Stop Trigger
Start and Stop Trigger
Pattern-Matching Trigger (Input Only)
Page
Continuous Output
Monitoring Data Transfer
Page
Figure 2-13. Programming Pattern I/O (Continuous) in NI-DAQ
Figure 2-14. Programming Pattern I/O in LabVIEW/LabVIEW RT
Monitoring Line StateChange Detection
Deciding the Width of Data to Acquire
Deciding Which Lines You Want to Monitor
Deciding How to Start and Stop Data TransferTriggering
Start Trigger
Stop Trigger
Start and Stop Trigger
Pattern-Matching Trigger
Page
Page
Chapter 2 Using Your 653X
653X User Manual 2-32 ni.com
Figure 2-20. Programming Change Detection (Continuous) in NI-DAQ
Specify data mask here
Figure 2-21. Programming Change Detection (Single Buffer) in NI-DAQ
Specify data mask here
Figure 2-22. Programming Change Detection for LabVIEW/LabVIEW RT
Timing Diagrams
Pattern I/O Timing Diagrams
Internal REQ Signal Source
External REQ Signal Source
t t t t t
Handshaking I/O Timing Diagrams
Comparing the Different Handshaking Protocols
Using the Burst Protocol
Page
Page
t t t
t t
t
t t t t
t t t
t t
t
t t
t t t t
t t
Using Asynchronous Protocols
Using the 8255-Emulation Protocol
Page
Figure 3-10. 8255 Emulation Input State Machine
Page
Figure 3-12. 8255 Emulation Output State Machine
t t t t t
t t t t
Using the Level-ACK Protocol
Figure 3-15. Level ACK Input State Machine
t
t t
Page
Figure 3-18. Level ACK Output State Machine
t t
t
Using Protocols Based on Signal Edges
Using the Trailing-Edge Protocol
Figure 3-20. Trailing Edge Input Handshaking Sequence
Figure 3-21. Trailing Edge Input State Machine
t
Figure 3-23. Trailing Edge Output Handshaking Sequence
Figure 3-24. Trailing Edge Output State Machine
t t
t
Using the Leading-Edge Protocol
Figure 3-27. Leading Edge Input State Machine
t
t t
Page
Figure 3-30. Leading Edge Output State Machine
X
t t
Using the Long-Pulse Protocol
Figure 3-33. Long Pulse Input State Machine
t t
*
Figure 3-36. Long Pulse Output State Machine
t
A
Specifications
Digital I/O
Memory
Page
Power Requirement
Power Available at I/O Connector
Physical
Environment
Page
B
Using PXI with CompactPCI
C
Connecting Signals with Accessories
Control Signals
Appendix C Connecting Signals with Accessories
653X User Manual C-2 ni.com
Making 68-Pin Signal Connections
Caution Do not make connections that exceed any of the maximum input or output ratings
Figure C-1. 653X I/O Connector 68-Pin Assignments
Signal Descriptions
Table C-3. Signal Descriptions
Table C-3. Signal Descriptions (Continued)
Making 50-Pin Signal Connections
Figure C-2. 68-to-50-Pin Adapter Pin Assignments
Use TableC-4 to find the accessories designed to connect to your 653Xdevice.
Optional Equipment for Connecting Signals
D
Hardware Considerations
Figure D-1. AT-DIO-32HS Block Diagram
Block Diagrams
Figure D-2. DAQCard-6533 for PCMCIA Block Diagram
Figure D-3. PCI-DIO-32HS, PCI/PXI-7030/6533, and PXI-6533 Block Diagram
Appendix D Hardware Considerations
FPGA
PCI I/O Channel
SCARAB Memory 1
Figure D-4. PCI/PXI-6534 Block Diagram
653X User Manual D-4 ni.com
Data Lines (32)
Control Lines (8)
RTSI/PXI Trigger Bus
Power-On State
Power Connections
Selecting and Terminating Cables
Using the Schottky-Diode Termination Scheme
Page
How Much Current Can I Sink or Source?
RTSI and PXI Trigger Bus Interfaces
Board, RTSI, and PXI Bus Clocks
RTSI and PXI Bus Triggers
E
Optimizing Your Transfer Rates
Determining the Maximum Transfer Rates
Obtaining the Fastest Transfer Rates
Interpreting Benchmark Results
AT-DIO-32HS
PCI-DIO-32HS
PXI-6533
DAQCard-6533 for PCMCIA
PCI-6534
PXI-6534
PCI-7030/6533 with LabVIEW RT
PXI-6533 with LabVIEW RT
Page
F
Technical Support Resources
Web Support
NI Developer Zone
Customer Education
System Integration
Worldwide Support
Glossary
Numbers/Symbols
A
B
C
D
F
Page
M
P
R
S
T
U
V
Page
Index
Numbers
A
B
C
D
E
F
G
H
Page
I
L
M
N
O
P
R
S
Page
T
U
V
