Glossary
PXI-PCI8330 Series User Manual G-2 www.ni.com
C
CCelsius
clock hardwarecomponent t hat controls timing for reading from or writing to
groups
counter/timer aci rcuit that counts external pulses or clock pulses (timing)
D
device A plug-in instrumentcard o r pad thatcan contain m ultiplechannels and
conversiondevices. Plug-in boards and PCMCIA cards, which connects to
your computer parallel port, are examples of devices.
digital trigger aTTL level signal having two discrete levels—a high and a low level
DMA directmemory access—amethod by which data can be transferred to/from
computer memory from/to a deviceo r memory on the buswhile the
processor does something else. DMA is the fastest method of transferring
data to/from computer memory.
I
IEEE Instituteof Electrical andElectronics Engineers
M
MITE MXI Interfaces To Everything—a custom ASIC designed by National
Instrumentsthat implements the PCI bus interface. The MITE supports bus
mastering for high speed data transfers overthe PCI bus.
P
PCI PeripheralComponent Interconnect—a hi gh-performance expansionbus
architecture originallydeveloped by Intel to replace ISA and EISA. It is
achievingwidespread acceptance as a standard for PCs and workstations;
it offersa theoretical maximum transfer rate of 1 32 Mbytes/s.