Our header file lcd.h makes interfacing 16×2 character LCD with using Keil C simpler and user friendly. Just include the header file and enjoy. LCD Interfacing with 89C51 – microcontroller – Circuit & C program. Learn how to interface 16 x 2 LCD and microcontroller using C code and circuit. This is a circuit diagram of Interfacing 16X2 LCD with AT89C51 which is a microcontroller family. We use LCD displays for displaying the error messages, etc.

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How to interface 16×2 LCD with 8051 microcontroller (AT89C51)

You uow also like: If the 7th bit of the accumulator is 1,then it jumps to DELY. Hi I constructed the circuit exactly as it is on my simulator and just copied the program and nothing is appearing on the LCD. Pulse E from high to low. What is Web Browser.

Resistor R1 limits the current through the back light LED and so do the back light intensity. High level at this pin enables read mode and low level at this pin enables write mode.

This microcontroller has 40 pin s with four 8-bit ports P 0P 1P 2and P 3. Contrast adjustment by providing a variable resistor through V CC.

Use 2 lines and 5×7 matrix. The JHDA has two built in registers namely data register and command register. Interface SD Card with Arduino. Here we only need to write to the LCD module. Sending data to the LCD. Skip to main content. This LCD has two registers.



This will saves the number of GPIO pins needed for other purpose. Choosing Battery for Robots. In this LCD each character is displayed in 5×7 pixel matrix. A high to low pulse is given at EN pin when data is sent.

This will save us 4 mjcrocontroller of our controller which we might employ it for other purpose. A 16x 2 LCD means it can display 16 characters per line and there are 2 such lines. The steps for sending data to the LCD module is given below. I think that you have use array in c programming.

how to interface 16×2 LCD with microcontroller (AT89C51) – CONSBEDDED

Each write operation is performed on the positive edge of the Enable signal. The pin description of this module is given below. Pin 3 is connected to a preset of 10k?

However 4 bit mode uses only 4 data lines along with the control pins. There is nothing appearing on lcd. This high-density System-in-Package SiP integrates controller, power switches, and support components. Send 06H for incrementing cursor position. Also instruction command codes are sent to these pins.

LCD interfacing with Microcontroller (AT89C51) – Circuit & C Program

We will discuss in detail about the commands later. E pin is for enabling the module. The resistance is varied by Capacitor C3, resistor R3 and push button switch S1 forms the reset circuitry.


DB0 to DB7 are the data pins. SPI Module of Arduino. The control pins pin are controlled by pins of P 0 port. An LCD module can be interfaced with a microcontroller either in 8 bit mode as seen above or in 4 bit mode. Program for interfacing LCD to microcontroller is shown below.

LCD Liquid Crystal Display screen is an electronic display module and find a wide range of applications. The programming part is done in assembly language instead of embedded C. Force cursor to the beginning of the 2 nd line. Anybody can send itnerface the programing for lcd interfacing with microcontroller and xbee s2. Previous post Next post. A command is an instruction given to LCD to do a predefined task like initializing, clearing the screen, setting the cursor position, controlling display etc.

LCD can be easily interfaced with a microcontroller to display a message or status of a device.