52
Operation
Theory
and remove the unnecessary processes in your applica-
tion programs.
3. When high-speed sampling frequency is applied, the
larger block size will improve the efficiency of DMA
transferring, and probability of overrun in the DMA pro-
cess will be reduced.
4. To apply the high-speed continuous digital input, it is rec-
ommended to execute your application programs in the
non-multitask operation system to reduce the latency
time between two DMA transfers.
Note
:
The latency time between two DMA transfers is different
from the PCI bus latency time mentioned in the previous sec-
tion of “Bus Mastering”. The former means the time differ-
ence between two continuous DMA processes started by the
software. And the latter means the time difference between
two continuously hardware DMA requests on the PCI bus
within a DMA process.
Содержание cPCI-7300A
Страница 4: ......
Страница 10: ...vi List of Figures...
Страница 18: ...8 Introduction...
Страница 21: ...Installation 11 2 4 cPCI PCI PCIe 7300A Layout Figure 2 1 PCI 7300A Layout Diagram...
Страница 22: ...12 Installation Figure 2 2 cPCI 7300A Layout Diagram Figure 2 3 PCIe 7300A Layout Diagram 167 65 111 15...
Страница 26: ...16 Installation Figure 2 4 CN1 Pin Assignment...
Страница 100: ...90 C C Libraries BufNotDWordAlign DMADscrBadAlign...
Страница 108: ...98 C C Libraries...
Страница 114: ...104 Appendix...