Zilog ZUSBOPTS User Manual
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Glossary
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Zilog Developer Studio II – ZNEO™
User Manual
G
graphical user interface (GUI).
1. A graphics-based user interface that enables users to select files, pro-
grams or commands by pointing to pictorial representations (icons) on the screen, rather than by typing
long, complex commands from a command prompt. 2. The windows and incorporated text displayed on a
computer screen.
groups.
Collections of logical address spaces typically used for convenience of locating a set of address
spaces.
GUI.
See graphical user interface.
H
h.
See hexadecimal.
hardware.
The boards, wires, and devices that comprise the physical components of a system.
Hertz.
Abbreviated Hz. A measurement of frequency in cycles per second. A hertz is one cycle per second.
A kilohertz (KHz) is one thousand cycles per second. A megahertz (MHz) is one million cycles per second.
A gigahertz (GHz) is a billion cycles per second.
hexadecimal.
A base-16 number system. Hex values are often substituted for harder-to-read binary num-
bers.
I
ICE.
In-Circuit Emulator. A Zilog product that supports the application design process.
icon.
A small screen image representing a specific element such as a document, embedded and linked
objects, or a collection of programs gathered together in a group.
ID.
Identifier.
IE.
Interrupt Enable.
initialize.
To establish start-up parameters, typically involving clearing all of some part of the device’s
memory space.
instruction.
Command.
interface (I/F).
1. In a system, a shared boundary, i.e., the boundary between two subsystems or two
devices. 2. A shared boundary between two functional units, defined by specific attributes, such as func-
tional characteristics, common physical interconnection characteristics, and signal characteristics. 3. A
point of communication between two or more processes, persons, or other physical entities.
interleaving.
The transmission of pulses from two or more digital sources in time-division sequence over a
single path.
interrupt.
A suspension of a process, such as the execution of a computer program, caused by an event
external to that process, and performed in such a way that the process can be resumed. The three types of
interrupts include: internal hardware, external hardware, and software.
I/O.
Input/Output. In computers, the part of the system that deals with interfacing to external devices for
input or output, such as keyboards or printers.