Table of Contents
©
National Instruments Corporation vii DIO 6533 User Manual
Timing Connections......................................................................................................4-13
Pull-Up and Pull-Down Connections...........................................................................4-13
Power Connections.......................................................................................................4-14
Field Wiring and Termination......................................................................................4-14
Chapter 5Signal Timing
Pattern-Generation Timing...........................................................................................5-1
Request Timing..............................................................................................5-2
Internal Requests..............................................................................5-2
External Requests.............................................................................5-2
Trigger Timing...............................................................................................5-3
Handshake Timing........................................................................................................5-4
8255 Emulation..............................................................................................5-4
Input.................................................................................................5-5
Output...............................................................................................5-6
8255 Emulation Mode Timing Specifications.................................5-8
Other Asynchronous Modes...........................................................................5-9
Level-ACK Mode............................................................................5-9
Input...................................................................................5-9
Output................................................................................5-10
Level-ACK Mode Timing Specifications..........................5-11
Leading-Edge Mode.........................................................................5-14
Input...................................................................................5-14
Output................................................................................5-14
Leading-Edge Mode Timing Specifications......................5-16
Long-Pulse Mode.............................................................................5-19
Long-Pulse Mode Timing Specifications..........................5-20
Trailing-Edge Mode.........................................................................5-23
Input...................................................................................5-23
Output................................................................................5-23
Trailing-Edge Mode Timing Specifications......................5-25
Burst Mode.....................................................................................................5-27
Burst Mode Timing Specifications..................................................5-28