Abstract
In this design in the design of watches and clocks, watches and clocks, not only has the general function, it can achieve a number of additional functions: temperature measurement, year, month, day, week.
The design can be divided into hardware and software circuit design to achieve two major parts. Hardware circuit design uses modular design: the central processing circuit, the clock circuit, the three most temperature measurement circuit; software used C programming language, designed with functional module division, including: the main program that process, temperature measurement procedures, the clock procedutes.
SCM also known as micro-controllers, that is, MCU, a Microcontroller Unit of the initials. PIC MCU is a micro-core technology companies in the United States (MIicrochip) of the microcontroller products. The design of the CPU used PIC16F877.
In the main function of the time relying on the chip DS1302 time to complete the majority of functionality. Its main feature is a serial data transmission, power-down protection for the provision of programmable power charging capabilities, and can close charging function. Using ordinary 32.768 kHz crystal.In this chip to achieve a fully functional time to meet the requirements of circuit.
Key words: single chip microcomputer Clock Chip Temperature Sensor