Chapter 11 Bus InterfaceNI 6232/6233 User Manual 11-2 ni.comEach DMA controller supports packing and unpacking of data through theFIFOs to connect different size devices and optimize PCI bus utilizationand automatically handles unaligned memory buffers.PXI ConsiderationsNote PXI clock and trigger signals are only available on PXI devices. Other devices useRTSI.PXI Clock and Trigger SignalsRefer to the PXI_CLK10, PXI Triggers, PXI_STAR Trigger, andPXI_STAR Filters sections of Chapter 10, Digital Routing and ClockGeneration, for more information on PXI clock and trigger signals.PXI and PXI ExpressNI PXI-6232/6233 modules can be installed in any PXI chassis and mostslots of PXI Express chassis.PXI specifications are developed by the PXI System Alliance(www.pxisa.org). Using the terminology of the PXI specifications,NI PXI-6232/6233 devices are 3U Hybrid Slot-Compatible PXI-1Peripheral Modules.3U designates devices that are 100 mm tall (as opposed to the taller 6Umodules).Hybrid slot-compatible defines where the device can be installed.PXI-6232/6233 devices can be installed in the following chassis and slots:• PXI chassis—PXI-6232/6233 devices can be installed in anyperipheral slot of a PXI chassis.• PXI Express chassis—PXI-6232/6233 devices can be installed in thefollowing PXI Express chassis slots:– PXI-1 slots—Accepts all PXI modules– PXI hybrid slots—Accepts PXI or PXI Express modules.PXI-1 devices use PCI signaling to communicate to the host controller (asopposed to PCI Express signaling).Peripheral devices are installed in peripheral slots and are not systemcontrollers.
