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Glossary
MXI-4 Series User Manual G-2 ni.com
D
device a plug-in instrument card or pad that can contain multiple channels and
conversion devices. Plug-in boards and PCMCIA cards, which connect to
your computer parallel port, are examples of devices.
digital trigger a TTL level signal having two discrete levels—a high and a low level
DMA direct memory access—a method by which data can be transferred to/from
computer memory from/to a device or memory on the bus while the
processor does something else. DMA is the fastest method of transferring
data to/from computer memory.
dyad MXI-4 dyad refers to any of the following 4 pairs of MXI-4 cards:
• PCI-8331 and PXI-8331
• PCI-8336 and PXI-8336
• PXI-8331 and PXI-8331
• PXI-8336 and PXI-8336
F
FPGA Field Programmable Gate Array—a logic device that has its functionality
defined after it is manufactured.
I
IEEE Institute of Electrical and Electronics Engineers
P
PCI Peripheral Component Interconnect—a high-performance expansion bus
architecture originally developed by Intel to replace ISA and EISA. It is
achieving widespread acceptance as a standard for PCs and workstations;
it offers a theoretical maximum transfer rate of 132 Mbytes/s.
PCI-PCI bridge a device that transparently expands the PCI bus on a computer motherboard
to another bus segment in the same machine. The bridge expands the
number of PCI expansion slots, but remains transparent to the end user.