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Figure 3-33. long pulse input state machine – National Instruments 653X User Manual

Page 87

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Chapter 3

Timing Diagrams

653X User Manual

3-36

ni.com

Figure 3-33. Long Pulse Input State Machine

Wait

For

Space

Wait

For

REQ

Programmable

Delay

Programmable

Delay

Wait

For

REQ

When REQ

Asserted

When 6533 Device has

space for data, input data.*

Clear

ACK

Pulse

When REQ

Unasserted

Initial State: ACK Cleared

Send

ACK Pulse

* With REQ-edge latching enabled, the data input

is from the last active-going REQ edge.