Glossary
VME-MXI-2 User Manual
Glossary-14
© National Instruments Corporation
V
V
volts
VDC
volts direct current
VME
Versa Module Eurocard or IEEE 1014; the IEEE Standard for a
Versatile Backplane Bus.
VME64
ANSI/VITA 1-1994; defines additional VMEbus protocols such
as MBLT and RETRY.
VMEbus System Controller
A device configured for installation in Slot 0 of a VXIbus
mainframe or the first slot of a VMEbus chassis. This device is
unique in the VMEbus system in that it performs the VMEbus
System Controller functions, including clock sourcing and
arbitration for data transfers across the backplane. Installing such
a device into any other slot can damage the device, the
VXIbus/VMEbus backplane, or both.
VXIbus
VMEbus Extensions for Instrumentation
VXIbus System Controller
A functional module with circuitry that generates the 16 MHz
system clock, provides the VMEbus arbiter and the VMEbus
Bus Timer Unit, and drives the VXIbus CLK10 signal.
W
write
Copying data to a storage device.
Word Serial Protocol
The simplest required communication protocol supported by
message-based devices in a VXIbus system. It utilizes the A16
communication registers to transfer data using a simple polling
handshake method.
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