In this tutorial we will learn how to interfacing EEPROM with PIC Microcontroller. EEPROM means Electrically Erasable Programmable Read-Only Memory. Here I am use ATMEL 24C08N EEPROM and Mikro C pro for PIC compiler for code editing. You can watch the video or read the written tutorial below.
 

In this program I am use I2C Library for data communication. The I²C full master MSSP module is available with a number of PIC MCU models. mikroC PRO for PIC provides library which supports the master I²C mode.

 I2C DATA BUS 2 The slave supports the I2C protocol. A device that sends data onto the bus is defined as a transmitter and a device receiving data as a receiver. The device that controls the message is called a master. The devices that are controlled by the master are referred to as slaves. The bus must be controlled by a master device that generates the serial clock (SCL), controls the bus access, and generates the START and STOP conditions.

EEPROM 24C08N

 

PIN DIAGRAM of 24C08N

Circuit diagram

void EEPROM_Write(){

     I2C1_Init(100000);
     I2C1_Start();
     I2C1_Wr(0xA2);               // send byte via I2C (device address + w)
     I2C1_Wr(10);                   // address byte (EEPROM Location)
     I2C1_Wr(0XAA);             // send data(data to be written)
     I2C1_Stop();                     // stop the i2c1
}
void EEPROM_Read(){
     I2C1_Start();
     I2C1_Wr( 0xA3);                 // send byte via I2C ( device address + w)
     I2C1_Wr(10);
     I2C1_Repeated_Start();
     I2C1_Wr(0xAB);                // send byte(device address+R)
     PORTB = I2C1_Rd(0u);     // read the data (no acknowladge)
     I2C1_Stop();
     }

void main() {
     TRISB = 0X00;
     PORTB = 0X00;
     EEPROM_Write();

     while(1){
              EEPROM_Read();
              delay_ms(500);
              PORTB = 0X00;
              Delay_ms(500);
              }
   
}

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