In these 128 bytes of RAM 14 bytes are used for time, date and registers. This RTC uses internal lithium battery to keep the time and date updated when power is failed. This IC also provides calendar components day, month and year. This IC provides the time in both 12 hour mode and 24 hour mode. This IC is used most of the applications to provide accurate time and date. P3.3 is connected to the push button used to call the set_time function.

P1.6 is configured as START pin used to run the clock with time set by the user. Push buttons are connected to the P1.4 and P1.5. Pins P1.1, P1.2 and P1.3 of controller are connected to the RS, RW, EN pins respectively. Port P2 of controller is connected to the data pins of LCD. Port P0 is used as a data port of Real time clock. The circuit shows you how interface RTC IC to the 8051 controller. Related Post: Circuit Diagram Digital Clock Circuit using 8051 and DS12C887 Circuit Diagram of Digital Clock using RTC DS12C8 Microcontroller Circuit Components The main principle of both the circuits is the 8051 controller continuously reads the data from Real time clock IC’s and process it in correct order to display the time on LCD. I will demonstrate two circuits of Digital Clocks using 8051 Microcontroller: one uses the RTC DS12C887 and the other uses the RTC DS1307. Here, the clock can work in either 24 hour mode or 12 hour mode and the RTC chip is configured by programming 8051 controller. For this clock, we can set the time at any instant.

In this type of applications, normally we use RTC (Real Time Clock) ICs to display the time and date accurately. in order to provide accurate time and date. Circuit Diagram Digital Clock Circuit using 8051 and DS1307Ī digital clock displays the time using numbers and it has many applications like cars, railway stations, houses, offices, etc.Circuit Diagram Digital Clock Circuit using 8051 and DS12C887.

Block clock mini