Glossary
©
National Instruments Corporation
G-3
CMOS
Complementary Metal Oxide Semiconductor; a process used in making
chips
Commander
a message-based device that is also a bus master and can control one or
more Servants
configuration registers
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.
D
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.
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 (Random Access Memory); storage that the computer must
refresh at frequent intervals
driver window
a region of address space that is decoded by the VXIpc 800/700 for use by
the NI-VXI software
DTB
See
Data Transfer Bus
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.
