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Glossary
VXI/VME-PCI8022 for Solaris G-4
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National Instruments Corporation
D
daisy-chain A method of propagating signals along a bus, in which the devices are
prioritized on the basis of their position on the bus.
Data Transfer 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.
DIP Dual Inline Package
DMA Direct Memory Access; a method by which data is transferred between
devices and internal memory without intervention of the central
processing unit.
DRAM Dynamic RAM
driver window A region of PCI address space that is decoded by the PCI-MXI-2 for use
by the NI-VXI software.
DTACK* Data Acknowledge signal
DTB See Data Transfer Bus.
dynamic configuration A method of automatically assigning logical addresses to VXIbus
devices at system startup or other configuration times.
dynamically configured A device that has its logical address assigned by the Resource Manager.
device 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.
E
ECL Emitter-Coupled Logic
EEPROM Electronically Erasable Programmable Read Only Memory
embedded controller 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.
EMC Electromechanical Compliance