Matrix-orbital LK204-24-USB Bedienungsanleitung PDF herunterladen (Seite 48)

Conﬁguration The way a system is set up, or the assortment of com-

ponents that make up the system. Conﬁguration can

refer to either hardware or software, or the combina-

tion of both.

Contrast The ratio of luminance between the light state of the

display to the dark state of the display.

Controller The micro-controller or PC used to control the Matrix

Orbital display unit.

DB-9 The designation of a connector used in the RS232 in-

terface: 9 pin connector

Firmware Software (programs or data) that has been written onto

read-only memory (ROM). Firmware is a combina-

tion of software and hardware. ROMs, PROMs and

EPROMs and ﬂash EEPROMs that have data or pro-

grams recorded on them are ﬁrmware.

Font A design for a set of characters. A font is the combina-

tion of typeface and other qualities, such as size, pitch,

and spacing.

Font Metric A deﬁnition of where font is to be placed, such as mar-

gins and spacing between characters and lines.

Hexadecimal Refers to the base-16 number system, which consists

of 16 unique symbols: the numbers 0 to 9 and the let-

ters A to F. For example, the decimal number 15 is

represented as F in the hexadecimal numbering sys-

tem. The hexadecimal system is useful because it can

represent every byte (8 bits) as two consecutive hex-

adecimal digits. It is easier for humans to read hex-

adecimal numbers than binary numbers.

Interface A means by which two systems interact.

LCD Liquid Crystal Display

Module Type Value This refers to the model number of the module.

Pixel The smallest individually controllable element of a

display.

Pre-Generated Fonts Pre-determined fonts which can be downloaded into

graphic liquid crystal displays.

Primitive A low-level object or operation from which higher-

level, more complex objects and operations can be

constructed. In graphics, primitives are basic elements,

such as lines, curves, and polygons, which you can

combine to create more complex graphical images.

RS-232 Short for recommended standard-232C, a standard in-

terface approved by the Electronic Industries Associa-

tion (EIA) for connecting serial devices.

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