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Glossary
© National Instruments Corporation Glossary-5 VXI-MXI User Manual
Dynamically A device that has its logical address assigned by the Resource Manager. A
Configured Device VXI device initially responds at Logical Address 255 when its MODID
line is asserted. A MXIbus device responds at Logical Address 255 during
a priority select cycle. The Resource Manager subsequently assigns it a
new logical address, which the device responds to until powered down.
The VXI-MXI cannot be dynamically configured.
E
ECL Emitter-Coupled Logic
EMI electromagnetic interference
Extended Class A class of VXIbus device defined for future expansion of the VXIbus
Device specification. These devices have a subclass register within their
configuration space that defines the type of extended device. The
VXI-MXI is an extended class mainframe extender device.
F
Fair Requester A MXIbus master that will not arbitrate for the MXIbus after releasing it
until it detects the bus request signal inactive. This ensures that all
requesting devices will be granted use of the bus.
FCC Federal Communications Commission
G
GB gigabytes of memory
GIN Daisy-chain Grant In signal
GOUT Daisy-chain Grant Out signal
GPIB General Purpose Interface Bus; the industry standard IEEE 488 bus.
H
Hard Reset Occurs when the mainframe is powered on and when the VMEbus
SYSRESET signal is active. A hard reset clears all the registers on the
VXI-MXI.
Hex Hexadecimal; the numbering system with base 16, using the digits 0 to 9
and letters A to F.
Hz hertz; cycles per second.