Abstract: The design of digital electronic clock based on AT89S52 MCU was described, and the design contains hardware design design, feature characteristic of AT89S52 MCU.the electronic clock can be achieved date, time and adjust the show, it will be displayed the real-time data on the LCD1602 at the same time, and constantly scan button, if a button is depressed,it will be produce the corresponding response with the button, the electronic clock has less costly and accurate clock and accurately adjust the time.
Keywords: MCU;Electronic clock;Temperature measure;LCD1602