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Message: <blockquote data-quote="Little DJ" data-source="post: 10919962" data-attributes="member: 320663">16x2 LCD with 16F877AIn this exercise lets look at how can we interface a LCD display with 16F877A PIC microcontroller. The mikroC PRO for PIC provides a library for communication with LCDs (with HD44780 compliant controllers) through the 4-bit interface. HD44780 Pinout<ol> <li data-xf-list-type="ol">Vss (Ground)</li> <li data-xf-list-type="ol">VCC (5V)</li> <li data-xf-list-type="ol">Contrast (use a potentiometer for variable contrast, or just connect to GND)</li> <li data-xf-list-type="ol">Register Select (RS), 0 = command write, 1 = data write</li> <li data-xf-list-type="ol">Read/Write (R/W), 0 = write to display, 1 = read from display</li> <li data-xf-list-type="ol">Enable (EN) - used to clock in data</li> <li data-xf-list-type="ol">DB0 (not used in 4-bit mode) - LSb</li> <li data-xf-list-type="ol">DB1 (not used in 4-bit mode)</li> <li data-xf-list-type="ol">DB2 (not used in 4-bit mode)</li> <li data-xf-list-type="ol">DB3 (not used in 4-bit mode)</li> <li data-xf-list-type="ol">DB4 - LSb in 4-bit mode</li> <li data-xf-list-type="ol">DB5</li> <li data-xf-list-type="ol">DB6</li> <li data-xf-list-type="ol">DB7 - MSb</li> <li data-xf-list-type="ol">Backlight + (5V)</li> <li data-xf-list-type="ol">Backlight - (GND)</li> </ol>4-bit and 8-bit modesAn HD44780 LCD can be operated in two different modes: 4-bit mode and 8-bit mode. In 8-bit mode, pins 7-14 of the LCD are connected to eight I/O pins on the microcontroller; while in 4-bit mode, pins 11-14 on the LCD are connected to four I/O pins on the microcontroller. The advantage to operating in 8-bit mode is that the programming is a bit simpler and data can be updated more quickly. The obvious reason to operate in 4-bit mode is to save four I/O pins on the PIC microcontroller.Circuit Diagram for 16x2 LCD<img src="http://3.bp.blogspot.com/-U9vx0OlVPfA/TmEYjmH3mqI/AAAAAAAAAIo/24C00WT6n3Q/s1600/16x2+LCD.png" alt="" class="fr-fic fr-dii fr-draggable " style="" />Complete Circuit Diagram with PIC Microcontroller<img src="http://4.bp.blogspot.com/-52hKTA-k1dE/TmEZKNHPFOI/AAAAAAAAAIs/J03gVXK9_D0/s1600/16x2+LCD.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" />     To get MikroC Code & PROTUES Design: <a href="http://www.electronicworkspace.com/2011/09/16x2-lcd-with-16f877a.html" target="_blank">Click Here</a></blockquote>

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