Figure 59. levelack mode output, Level-ack mode timing specifications -11, Figure 5-9 – National Instruments DIO 6533 User Manual
Page 70: Level-ack mode output -11, Level-ack mode timing specifications
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Chapter 5
Signal Timing
© National Instruments Corporation
5-11
DIO 6533 User Manual
Figure 5-9 shows an output transfer in level-ACK mode.
Figure 5-9. Level-ACK Mode Output
Level-ACK Mode Timing Specifications
and
show the timing diagrams for level-ACK mode.
Wait
For
Data
Wait
For
REQ
Programmable
Delay
Programmable
Delay
Wait
For
REQ
When REQ
Asserted
Clear ACK
When 6533 Device
Has Data to Output,
Output Data*
When REQ
Unasserted
Initial State
ACK Cleared
Send
ACK
* With REQ-edge latching enabled, the data written is
delayed until the next inactive-going REQ edge.
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