National Instruments 653X Manuale Utente

© National Instruments Corporation

Figure 3-36.  Long Pulse Output State Machine

Wait

For

Data

Wait

For

REQ

Programmable

Delay

Programmable

Delay

Wait

For

REQ

When REQ

Asserted

When 6533 Device has 

data to output, output data.*

Clear

ACK

Pulse

When REQ

Unasserted

Initial State: ACK Cleared

Send

ACK Pulse

* With REQ-edge latching enabled, the data output is

delayed until the next inactive-going REQ edge.