Stock#: 30057
Category: Audio Visual

2x20 Serial LCD with Keypad Interface

2x20 Serial LCD with Keypad Interface

 

DESCRIPTION: 

This new 20 character by 2 line serial LCD (TTL) has a keypad interface and a white backlit. Dimensions, features, and more are explained in the outline below. This LCD allows you to draw bar graphs (either horizontal or vertical) and define up to eight special characters. The keypad interface (up to a 5x5 Keypad) is a valuable feature which processes the keypad row/column matrix into a serial (RS-232 or I2C) data byte stream. The Matrix Orbital part number is LK202-25-GW. Pre-modified for BASIC Stamp-compatibility (TTL level).

Display Size:

• Module size: 116.0mm(L) x 37.0mm(W) x 27.5mm(T)

• Display size: 82.2mm(L) x 18.2mm(W)

• Character size: 3.20 x 5.55mm

Feature Set:

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

• Speeds from 1200 bps to a lighting fast 19.2 Kbps over RS232

• Communicate over I2C or RS232 (with software controlled speed)

• Use up to 16 modules on the same 2-wire I2C interface

• Fully buffered so that no delays in transmission are ever necessary

• Add your own Splash/Start-up screen

• Use our "Remember" functions to save settings

• Software controlled contrast

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

• Use up to a 25 key keypad (5x5) with a 10 key buffer

• Six general purpose outputs for a variety of applications

• Horizontal or Vertical bar graphs

• Fits Matrix Orbital PC Bay inserts without any modifications

LCD Functionality

The LCD is designed as the display unit for an associated controller. The controller may be anything from a single board, special purpose microcontroller to a PC, depending on the application. This controller is responsible for what you see on the screen of the LCD.

This 2x20 Serial LCD provides a simple command structure to allow text 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 luminous for low-light situations. Display may be turned on or off under program control. Brightness is adjustable to compensate for differing lighting conditions.

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.

This LCD does NOT include bitmap graphics capability, except that permitted by defining special characters.

Keypad Interface

The keypad interface takes row/column input and converts it to ASCII characters, which are delivered out the RS-232 or I2C port to the associated controller. Note that the keypad is not used to directly control any aspect of the operation of the LCD, which acts simply as a matrix to serial converter. If you want to use the keypad to control the display you must program your controller accordingly. The LCD ships with a cd-rom that contains documentation and schematics, no printed documentation.