National Instruments DIO 6533 사용자 설명서

Chapter 5

Signal Timing

© National Instruments Corporation

5-25

DIO 6533 User Manual

Figure 5-21 shows a write transfer in trailing edge mode. 

Figure 5-21.  Trailing-Edge Mode Output

Figures 5-22 

and

5-23 

show the timing diagrams for trailing-edge 

mode.

Wait

For

Data

Wait

For

REQ

Programmable

Delay

Programmable

Delay

Wait

For

REQ

When REQ
Unasserted

When 6533 Device

Has Data to Output,

Output Data*

Clear

ACK

When REQ

Asserted

Initial State

ACK Cleared

Send

ACK 

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

delayed until the next inactive-going REQ edge.