National Instruments 653X User Manual page 84

Chapter 3 Timing Diagrams
Initial State: ACK Cleared
When REQ
Asserted
Wait Wait
Programmable
For For
Delay
REQ Data
When 653 X Device has
data to output, output data.*
Clear
Programmable
ACK
Delay
Send
Pulse
ACK
Pulse
Wait
When REQ
For
Unasserted
* With REQ-edge latching enabled, the data output is
REQ
delayed until the next inactive-going REQ edge.
Figure 3-30. Leading Edge Output State Machine
© National Instruments Corporation 3-33 653X User Manual