ADLINK PCIe-7360 - Manual (Page 41)

Operations 31
PCIe-7360
Figure 3-8: Scatter-Gather DMA for Data Transfer
Choose Finite or Continuous Operation
Data can be transferred continuously to or from computer memory
(continuous operation), or you can specify the number of samples
you want to transfer (one-shot operation). In either case, the
PCIe-7360 transfers the data using direct memory access (DMA)
without occupying CPU resources.
3.6 Sample Clock
The sample clock controls the data rate of digital pattern acquisi-
tion and generation. For PCIe-7360, the sample clock can be con-
figured from internal timer pacer or external clock through the
SMB connectors or SCSI-VHDCI connector.
Digital Input (DI) Sample Clock
For the operation of digital pattern acquisition in continuous mode
or burst handshake mode, the PCIe-7360 card can acquire digital
data from external devices at a specific sampling rate (DI sample
PCI Bus
First PCI Address
First Dual Address
Transfer Size
Next Descriptor
PCI Address
Dual Address
Transfer Size
Next Descriptor
PCI Address
Dual Address
Transfer Size
Next Descriptor
Local Memory
(FIFO)