Specifications

mikroElektronika | Free Online Book | PIC Microcontrollers | Appendix B: Examples
The R/C network represented by the broken line in the figure above denotes optional connection which lessens the effects
of noises by eliminating very short pulses.
LCD DISPLAY
This component is specifically manufactured to be used with microcontrollers, which means that it cannot be activated by
standard IC circuits. It is used for displaying different messages on a miniature liquid crystal display. The model described
here is for its low price and great capabilities most frequently used in practice. It is based on the HD44780 microcontroller
(Hitachi) and can display messages in two lines with 16 characters each. It displays all the letters of alphabet, Greek
letters, punctuation marks, mathematical symbols etc. In addition, it is possible to display symbols made up by the user.
Other useful features include automatic message shift (left and right), cursor appearance, LED backlight etc.
LCD DISPLAY
Along one side of a small printed board there are pins used for connecting to the microcontroller. There are in total of 14
pins marked with numbers (16 if the backlight is built in). Their function is described in the table bellow:
Function Pin Number Name Logic State Description
Ground 1 Vss - 0V
Power supply 2 Vdd - +5V
Contrast 3 Vee - 0 - Vdd
http://www.mikroe.com/en/books/picmcubook/appb/ (11 of 54)5/3/2009 11:36:02 AM