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NI PXIe-8383mc Getting Started Guide
two systems occurs through processor domain partitioning and address translation between the
memory-mapped spaces of the two processors.
Each side of the PXImc logic block is connected to the front panel “mc” cable port and
backplane connectors.
Tip
For optimum link widths and performance, use the NI PXIe-8383mc in chassis
that support a Gen 2 x8 backplane link. The chassis should also be controlled by a
Slot 1 controller with Gen 2 x8 links to the backplane. National Instruments offers
Gen 2 PXI Express chassis and controllers that can establish x8 links.
Onboard Switches
The NI PXIe-8383mc contains the following onboard switches.
SW3—MC / DC Mode Switch
The NI PXIe-8383mc is a multi-personality product capable of operating in either
multi-computing (MC) mode or daisy-chain (DC) mode. This makes it possible for an
NI PXIe-8383mc in MC mode to connect to another NI PXIe-8383mc in DC mode, just as if it
were a NI PXIe-8384 daisy-chain module. National Instruments recommends operating the
NI PXIe-8383mc in MC mode, and using a NI PXIe-8384 for daisy-chain purposes.
.
SW4—FACT / USER (Factory / User) Mode Switch
The FACT/USER switch shown in Figure 3 selects between two different memory resource
request sizes. With the switch in the FACT position the NI PXIe-8383mc requests a minimal
amount of system resources and should be compatible with most computer systems that try to
connect to it. With the switch in the USER position the NI PXIe-8383mc requests a greater
amount of system resources which may affect system compatibility. Depending on your
application, USER mode may provide better system performance. Refer to the
NI-PXImc Help
file included with the NI-PXImc driver for more information on this topic.
Note
Some BIOSes may have trouble allocating the resources requested by the
NI PXIe-8383mc set to USER mode. The BIOSes of high performance NI embedded
controllers such as the NI PXIe-8133 and NI PXIe-8135 have been designed with this
in mind and offer maximum system compatibility.
MC / DC Mode Switch
SW3
MC (Default)
PXImc Logic Block mode
DC
Daisy-chaining mode
*
*
NI recommends using the NI PXIe-8384 instead of an NI PXIe-8383mc set to DC mode since
this feature may be removed in the future.
