PC system bus adapter 2173 / 2177
L
15
PC system bus adapter EN 1.1
6.2
Glossary
CAN
Abbreviation for
Controller Area Network
:
International bus system standardised as ISO 11898
CANopen
A bus system with optimised communication facilities based on CAN technology and
the application layer CAL (CAN Application Layer).
I/O base address
I/O base addresses define special memory areas for data exchange between
operating system and devices such as keyboard controller, hard disk controller,
parallel interface, graphics card, ...
ECP
Abbreviation for
Extended Capability Port
:
Mode for data transfer via the parallel interface defined in the IEEE 1284-1994
standard which is mainly used by modern printers and scanners and to be set in the
PC BIOS.
Interrupt
Signal from a peripheral to the processor used to ask for calculation time. On receipt,
the processor will interrupt the running program and take care of the peripheral.
IRQ
Abbreviation for
Interrupt ReQuest
:
English for interrupt request (see Interrupt).
LPT
Abbreviation for
Line PrinTer
(line printer)
Parallel interface
PC interface which, unlike the serial interface (COM port), supports data transfer over
8 lines (i.e. 8 bits are transmitted at the same time). The printer is usually connected
to the parallel interface. The parallel interface is also called LPT port or centronics
interface.
System bus
A Lenze standard bus system similar to CANopen.
USB
Abbreviation for
Universal Serial Bus
:
Serial bus system which is becoming increasingly important in the field of PC
peripherals. Notably because USB is an easy and universal interface for almost any
kind of device.
USB hub
A USB hub is a kind of ”distributor” which makes it possible to connect several
(usually 4 -6 ) USB devices to one USB port.
If the PC-internal power supply is not sufficient the USB devices can also be supplied
via the USB hub.
