National Instruments 370551A-01 用户手册

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页码 139
Glossary
G-6
ni.com
K
KB
Kilobytes of memory.
L
LED
Light Emitting Diode.
logical address
An 8-bit number that uniquely identifies each VXIbus device in a system. 
It defines the A16 register address of a device, and indicates Commander 
and Servant relationships.
M
m
Meters.
master
A functional part of a MXI/VME/VXIbus device that initiates data transfers 
on the backplane. A transfer can be either a read or a write.
master-mode operation
A device is in master mode if it is performing a bus cycle which it initiated.
MB
Megabytes of memory.
MBLT
Eight-byte block transfers in which both the Address bus and the Data bus 
are used to transfer data.
message-based device
An intelligent device that implements the defined VXIbus registers and 
communication protocols. These devices are able to use Word Serial 
Protocol to communicate with one another through communication 
registers.
MITE
A National Instruments custom ASIC, a sophisticated dual-channel DMA 
controller that incorporates the Synchronous MXI and VME64 protocols to 
achieve high-performance block transfer rates.
MODID
Module Identification lines.
MTBF
Mean Time Between Failure.
MXI-2
The second generation of the National Instruments MXIbus product line. 
MXI-2 expands the number of signals on a standard MXIbus cable by 
including VXI triggers, all VXI interrupts, CLK10, SYSFAIL*, 
SYSRESET*, and ACFAIL*.