Glossary
© National Instruments Corporation
Glossary-9
VME-MXI-2 User Manual
MTBF
Mean Time Between Failure
multiframe
A system consisting of more than one mainframe connected
together to act as one; it can have multiple first slot devices.
MXI-2
The second generation of the National Instruments MXIbus
product line. MXI-2 expands the number of signals on a standard
MXIbus cable by including VXI triggers, all VME interrupts,
VXI CLK10, SYSFAIL*, SYSRESET*, and ACFAIL*.
MXIbus
Multisystem eXtension Interface Bus; a high-performance
communication link that interconnects devices using round,
flexible cables.
MXIbus System Controller
A functional module that has arbiter, daisy-chain driver, and
MXIbus cycle timeout responsibility. Always the first device in
the MXIbus daisy-chain.
N
nonprivileged access
One of the defined types of VMEbus data transfers; indicated by
certain address modifier codes. Each of the defined VMEbus
address spaces has a defined nonprivileged access mode.
Non-Slot 0 device
A device configured for installation in any slot in a VXIbus
mainframe other than Slot 0. Installing such a device into Slot 0
can damage the device, the VXIbus backplane, or both.
normal operating mode
Contrasted with interlocked arbitration mode; in this mode there
can be masters operating simultaneously in the
VMEbus/MXIbus system. Vulnerable to deadlock situations.
O
onboard RAM
The optional RAM installed into the SIMM slots of the
VME-MXI-2 module.
outward cycle
A data transfer cycle that maps from the VMEbus to the
MXIbus.
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