Matrix-orbital LK204-24-USB Manual do Utilizador descarregar pdf (Página 5)

1 Introduction

The LK204-24-USB is equipped with the following features;

• 20 column by 4 line text display

• Built in font with provision for up to 8 user deﬁned characters

• USB communication or serial TTL communication

• Use of up to 100 modules on the same USB host

• Fully buffered so that no delays in transmission should ever be necessary

• Ability to add a customized splash / start up screen

• Use of "Remember" functions to save settings

• Software controlled contrast

• Software controlled backlight brightness

• Backlight with conﬁgurable time-out setting up to 180 minutes

• Use of up to a 24 key keypad with a 10 key buffer

• Six general purpose outputs for a variety of applications

• 4 Advanced general purpose outputs

• 3 Low power general purpose ouputs

• Horizontal or vertical bar graphs

• Power and data from one USB cable

• Extended temperature option

• A perfect ﬁt to Matrix Orbital’s PC Bay inserts without any modiﬁcations

• Dallas 1-wire Bridge

1.1 What to Expect From the LK204-24-USB

The LK204-24-USB is designed as the display unit for an associated controller. The controller may be

anything from a single board, special purpose micro-controller to a PC, depending on the application. This

controller is responsible for what is displayed on the screen of the display.

The display provides a simple command structure which allows texts and bar graphs to be displayed on

the screen. Text fonts are built in and use standard ASCII mapping. Provision is made for up to 8 user

deﬁned characters.

The screen is backlit for low light situations. Backlighting may be turned on or off under program

control. Contrast is adjustable to compensate for differing lighting conditions and viewing angles.

General purpose outputs allow the controller to switch up to six electronic or electro-mechanical devices

by issuing commands to the display unit. These can be used for controlling LEDs, relays, etc.

1.2 What Not to Expect From the LK204-24-USB

The display does not include bitmap graphics capability, except that permitted by deﬁning special char-

acters.

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