Matrix Orbital LK204-24-USB - Manual (Page 5)

1 Introduction
The LK204-24-USB is equipped with the following features;
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20 column by 4 line text display
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Built in font with provision for up to 8 user defined characters
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USB communication or serial TTL communication
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Use of up to 100 modules on the same USB host
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Fully buffered so that no delays in transmission should ever be necessary
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Ability to add a customized splash / start up screen
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Use of "Remember" functions to save settings
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Software controlled contrast
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Software controlled backlight brightness
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Backlight with configurable time-out setting up to 180 minutes
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Use of up to a 24 key keypad with a 10 key buffer
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Six general purpose outputs for a variety of applications
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4 Advanced general purpose outputs
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3 Low power general purpose ouputs
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Horizontal or vertical bar graphs
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Power and data from one USB cable
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Extended temperature option
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A perfect fit to Matrix Orbital’s PC Bay inserts without any modifications
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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.
Matrix Orbital LK204-24-USB 1