National Instruments NI 6612 User Manual

6-2 | ni.com
Chapter 6 Bus Interface
Each DMA controller supports several features to optimize PCI Express and PXI Express
bus utilization. The DMA controllers pack and unpack data through the FIFOs. The DMA
controllers also automatically handle unaligned memory buffers on PXI Express.
• Programmed I/O—Programmed I/O is a data transfer mechanism where the user’s
program is responsible for transferring data. Each read or write call in the program initiates
the transfer of data. Programmed I/O is typically used in software-timed (on-demand)
operations.
PXI Express Considerations
PXI Express Clock and Trigger Signals
Refer to the
PXI Trigger Signals (NI PXIe-6612 Only) section of Chapter 5, Counter Signal
Routing and Clock Generation
, for more information about PXI and PXI Express clock and
trigger signals.
PXI Express
PXI Express devices can be installed in any PXI Express slot in PXI Express chassis.
PXI Express specifications are developed by the PXI System Alliance (
www.pxisa.org).

National Instruments NI 6612 Specifications

General

Brand	National Instruments
Model	NI 6612
Category	Computer Hardware
Language	English