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configuration
registers
D
DACK
daisy-chain
Data Transfer Bus
DIP
DMA
DRQ
DTB
dynamic
configuration
dynamically
configured device
E
ECL
embedded
controller
EMI
external controller
© National Instruments Corporation
A set of registers through which the system can identify a module device
type, model, manufacturer, address space, and memory requirements. In
order to support automatic system and memory configuration, the VXIbus
specification requires that all VXIbus devices have a set of such registers.
DMA Acknowledge
A method of propagating signals along a bus, in which the devices are
prioritized on the basis of their position on the bus.
DTB; one of four buses on the VMEbus backplane. The DTB is used by a
bus master to transfer binary data between itself and a slave device.
Dual Inline Package
Direct Memory Access; a method by which data is transferred between
devices and internal memory without intervention of the central processing
unit.
DMA Request
See Data Transfer Bus.
A method of automatically assigning logical addresses to VXIbus devices
at system startup or other configuration times.
A device that has its logical address assigned by the Resource Manager.
A 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.
Emitter-Coupled Logic
An intelligent CPU (controller) interface plugged directly into the VXI
backplane, giving it direct access to the VXIbus. It must have all of its
required VXI interface capabilities built in.
Electromagnetic Interference
In this configuration, a plug-in interface board in a computer is connected
to the VXI mainframe via one or more VXIbus extended controllers. The
computer then exerts overall control over VXIbus system operations.
Glossary-3
VXI-SB2020 and NI-VXI for Solaris
Glossary
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