National Instruments 653X Manuale Utente
Chapter 3
Timing Diagrams
3-6
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Figure 3-3. Burst Transfer Example (Input)
Figure 3-4. Burst Transfer Example (Output)
Note
Since data is transferred only when both the 653X device and the peripheral device
are ready (and thus ACK and REQ are asserted), it is not reasonable to expect data to arrive
at consistent intervals. If consistent intervals are an important criteria for your application,
use pattern I/O.
at consistent intervals. If consistent intervals are an important criteria for your application,
use pattern I/O.
PCLK
ACK
Data In
Valid
REQ
D5
D1
D2
D3
D4
= data transfer occurs
PCLK
ACK
REQ
Data Out
Valid
D1
D2
D3
D4
D5
= data transfer occurs