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C-2
Glossary
KPCI-PIO32IOA and KPCI-PDISO8A User’s Manual
Address
1
A number specifying a location in memory where data is stored.
API
See
application programming interface.
Application programming interface
1
A set of routines used by an application program to direct the performance of a procedure by the
computer’s operating system.
Bus mastering
On a microcomputer bus such as the PCI bus, the ability of an expansion board to take control of
the bus and transfer data to memory at high speed, independently of the CPU. Replaces direct
memory access (DMA).
Bus
An interconnection system that allows each part of a computer to communicate with the other
parts.
Byte
A group of eight bits.
Contact bounce
The intermittent and undesired opening of relay contacts during closure, or closing of relay con-
tacts during opening.
Crosstalk
The coupling of a signal from one input to another (or from one channel to another or to the out-
put) by conduction or radiation. Crosstalk is expressed in decibels at a specified load and up to a
specific frequency.
Darlington
A high gain current amplifier composed of two bipolar transistors, typically integrated in a sin-
gle package.
DLL
See
Dynamic Link Library.
Direct memory access
See
DMA mode.
DMA mode
Direct memory access mode.
Mode in which data transfers directly between an I/O device and
computer memory. In the most general sense, PCI bus mastering is a DMA mode. More com-
monly, however, DMA mode refers to data transfers across the ISA bus, using a special circuitry
on the computer motherboard.
See also
bus mastering.
Driver
Software that controls a specific hardware device, such as a data acquisition board.
Dynamic Link Library (DLL)
A software module in Microsoft Windows containing executable code and data that can be
called or used by Windows applications or other DLLs. DLL functions and data are loaded and
linked at run time when they are referenced by a Windows application or other DLLs.
Expansion slot
1
A socket in a computer designed to hold expansion boards and connect them to the system bus
(data pathway).
Foreground task
An operation, such as a task that occurs in the single or synchronous mode, that cannot take
place while another program or routine is running.
Summary of Contents for KPCI-PIO32IOA
Page 11: ...1 Overview...
Page 14: ...2 General Description...
Page 17: ...3 Installation...
Page 32: ...4 External Interrupts...
Page 36: ...5 Troubleshooting...
Page 52: ...A Specifications...
Page 57: ...B I O Address Mapping...
Page 64: ...C Glossary...