National Instruments DIO 6533 사용자 설명서

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

 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.