This tutorial explains one of the real world application of Here we are going to explain how a 16×2 LCD is interfaced with AT89S The AT89S52 Mini Development Board includes on the board hardware support for 2×16 LCD display in 8bit mode configuration. A male berg. AT89S52 Mini Development Board – LCD Interfacing. The AT89S52 Mini Development Board includes on the board hardware support for 2×16 LCD display in.

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The reset circuit, oscillator circuit and power supply need to be provided for the proper working of the circuit.

AT89S52 Mini Development Board – LCD Interfacing

The module were are talking about here is type number JHDA which is a very popular one. All the pins are clearly understandable by their name and functions, except the control pins, so they are explained below:. Program for interfacing LCD to microcontroller is shown below. We will discuss in detail about the commands later.

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Interfacing of LCD with AT89S52(8051)

Generally this is set to 0, because we do not have need to read data from LCD. So first let’s understand the 16 pins of LCD module.

The necessary commands for the LCD initialization are defined at the end part of the program. Now at89z52 Header file is included in to the project folder. Send 01H for clearing the display and return the cursor. The programming part is done in assembly language instead of embedded C.


A high to low transition at this pin will enable the module. Feed in the following code: The steps that has to be done for initializing the LCD display is given below and these steps are common for almost all applications. The connection details are: Code Explanation I have tried to explain the code through comments in code itself.

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Pls provide alp programs for LCD interfacing. Sending data to the LCD. Comment if you come across any doubts. The popular 16 x 2 LCD can be interfaced with 89S52 in 4 bit or 8 bit mode.

Resistor R1 limits the current through the back light LED and so do the back light intensity. There is nothing appearing on lcd. See the circuit diagram for better understanding. However 4 bit mode uses only 4 data lines along with the control pins. The steps for sending data to the LCD module is given below.

RS is the register select pin.

AT89S52 Mini Development Board – LCD Interfacing

To find out more, including how to control cookies, see here: An LCD module can be interfaced with a microcontroller either in 8 bit mode as seen above or in 4 bit mode. And control pins RS, RW and E to the pin 12,13,14 pin 2,3,4 of port lxd of microcontroller respectively. LCD interfacing with 89s52 Tutorials 4. The JHDA has two built in registers namely data register and command register. Repeat above steps for sending another lc.


Thankyou for taking the efforts! Here we only need to write to the LCD module.

LCD interfacing with 89s52 | alselectro

Check your circuit connections again. Middle leg of the variable resistor is connected to PIN 3 and other two legs are connected to voltage supply and Ground. Including this header file into your project makes programming much easier.

Contrast Setting, connected to Vcc thorough a variable resistor. Capacitor C3, resistor R3 and push button switch S1 forms the reset circuitry.

The above video shows lcd interface on bread board Can this project be shown on general purpose board??? And set it to 1, if we are reading from LCD module. I have used these Pins in above circuit.

This will save us 4 pins of our controller which we might employ it for other purpose. Getting Started with Microcontroller. A header file defining all Functions interfacung to LCD control is created and available for Download here. Get Our Weekly Newsletter!

In this way the total number of pins can be reduced to 6. You may also like: Click OK to get the Target1 on the project pane.