National Instruments 370551A-01 用户手册
Glossary
© National Instruments Corporation
G-5
EMI
Electromagnetic Interference.
expansion ROM
An onboard EEPROM that may contain device-specific initialization and
system boot functionality.
system boot functionality.
external controller
In this configuration, a plug-in interface board in a computer is connected
to the VXI mainframe via one or more VXIbus extended controllers. The
computer then exerts overall control over VXIbus system operations.
to the VXI mainframe via one or more VXIbus extended controllers. The
computer then exerts overall control over VXIbus system operations.
F
fair requester
A MXIbus master that will not arbitrate for the MXIbus after releasing
it until it detects the bus request signal inactive. This ensures that all
requesting devices will be granted use of the bus.
it until it detects the bus request signal inactive. This ensures that all
requesting devices will be granted use of the bus.
H
hex
Hexadecimal; the numbering system with base 16, using the digits 0 to 9
and letters A to F.
and letters A to F.
Hz
Hertz; cycles per second.
I
I/O
Input/output; the techniques, media, and devices used to achieve
communication between machines and users.
communication between machines and users.
IC
Integrated Circuit.
IEEE
Institute of Electrical and Electronics Engineers.
in.
Inches.
interrupt
A means for a device to request service from another device.
interrupt handler
A VMEbus functional module that detects interrupt requests generated by
Interrupters and responds to those requests by requesting status and identify
information.
Interrupters and responds to those requests by requesting status and identify
information.
interrupt level
The relative priority at which a device can interrupt.
IRQ*
Interrupt signal.