INTERFACING OF LCD DISPLAY TO MICRO-CONTROLLER 8051

INTERFACING OF LCD DISPLAY TO MICRO-CONTROLLER MC8051

The LCD used here is LM016L and Micro-controller is 8051(P89V51RD2).

It is 16 pin Lcd display in which 3 pin are dedicated as control pin and 8 pin for data transfer.

Here I had Connected the Port 0 of MC to LCD and P2(0,1,2) pin to control pin of LCD.

NOTE: 3 control pins are RS = Register Select, RW = Read/Write, and E = Enable.

The working of LCD main depends on this 3 control pin:

• When RS = 0, Means Register selected is Command register and the data send are command for LCD.
• When RS = 1, Means Register Selected is Data register and the data is directly send to DDRAM (Display Data RAM) for displaying the String.
• RW pin is Read or Write enable pin. RW = 0, Means Write functions is select so that we can write data or command into LCD RAM.
• RW pin when is set as 1, means Read function is selected. We only read the status of LCD DDRAM, i.e. whether it’s Busy or ready to accept the data.
• E = Enable pin is used to latch the data send from Micro-controller to LCD.
• When E get high to low pulse it latch the data into LCD RAM.
• So for every data or command to be send to LCD display the E pin must have high to low pulse.

Important Command of LCD:

• Clear the display = 0x01;
• Display on and cursor blinking = 0x0E;
• Display on and cursor blinking off = 0x0C;
• Cursor incrementing = 0x06;
• 1^st location in the 1^st line of lcd display = 0x80;
• 1^st location in the 2^nd line of lcd display = 0xC0;
• For Left Shifting the data of lcd = 0x18;
• For Right shifting the data of lcd = 0x1C;

In this method I have used the pointer to send of number string

This method is called as pass by Reference.

Any Queries Plz Do Comment.

For Video on this example: Click on this link for video