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Glossary
D
daisy-chain
Data Transfer Bus
DIP
DMA
DRAM
driver window
DTACK*
DTB
dynamic configuration
dynamically configured
device
E
ECL
EEPROM
EMC
EMI
expansion ROM
MXI-2 Configuration Reference Manual
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 decoded by the PCI-MXI-2, PCI-MXI-2
Universal, or PXI-8320 for use by the NI-VXI software.
Data Acknowledge signal
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
Electronically Erasable Programmable Read Only Memory
Electromechanical Compliance
Electromagnetic Interference
An onboard EEPROM that may contain device-specific initialization and
system boot functionality.
G-4
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