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Glossary
D
daisy-chain
Data Transfer Bus
DIP
DMA
DRAM
driver window
DTACK*
DTB
dynamically configured
device
dynamic configuration
E
ECL
EEPROM
embedded controller
EMC
VXI/VME-PCI8026 for Linux
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.
Dynamic RAM
A region of PCI address space that is decoded by the PCI-MXI-2 for use by
the NI-VXI software.
Data Acknowledge signal
See
Data Transfer
Bus.
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.
A method of automatically assigning logical addresses to VXIbus devices
at system startup or other configuration times.
Emitter-Coupled Logic
Electronically Erasable Programmable Read Only Memory
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.
Electromechanical Compliance
G-4
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