Real Time Clock(How to interface DS1307 RTC to pic18f452 microcontroller)

Welcome to you .
              Here i am designed a Real Time Clock using  PIC18F452 microcontroller.
I will explain how to design Real Time Clock using PIC microcontroller.

RTC Using PIC18F452

PIC is advance microcontroller series. In PIC microcontroller I2C(Inter-Integrated Circuit) Bus is available on board. RTC used in this project is DS1307 which needed I2C interface to read and write data from and to RTC. Because I2C bus is on board in PIC microcontroller Interfacing  becomes easy.
There will no need to write separate code for I2C bus. 



Fig. 2
Fig. 3
The circuit is designed in two separate parts. Fig. 1 Shows the RTC DS 1307 IC connection. This connection is done by using zero PCB. The connection is same as shown in Fig. 3.
I used PIC18F452 Development Board which i designed few months ago using Screen print technique for pcb design. The SCL pin of RTC is connected to pin  18 and SDA  pin is connected to pin 23 of PIC microcontroller. LCD 16x2 is interfaced in following way.


  • D7          -    RD7
  • D6          -    RD6
  • D5          -    RD5
  • D4          -    RD4
  • RS          -    RB5
  • RW         -    RB4
  • E            -    RB3

Working Video


The code is written in MPLAB IDE and C18 compiler is used to to compiler the code. PICKIT 2 is used to burn the code on PIC18F452 IC.
Please read the README file which available in the attachment before proceed.
Click here to download this code.

For any query please write at

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