National Instruments DIO 6533 - Manual (Page 6)

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 5
Signal 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