As lectronic products to intelligence and the continuousdevelopmentof miniaturization, SCM has become the research and development of electronic product first controller. SCM (Single Chip computer is Chip Microcomputer - - your CPU, is set to), ROM, RAM, timing, counting and multiple interfaces in one of the micro controller. One is by all sorts of 51 SCM / 52 the representative, is widely used in various fields. In order to promote the use of public domain in an application,this paper introduces the design of automatic AT89S52 SCM system, theactual production bell that this system has the time of calibration andsetting, etc, accord with the request, ringing school has certain practical significance.
Keywords: AT24C02. AT89S52. I2Cbus. DS1302bus. LCD1602. real-time. Accuracy.