Electronic clock has become a necessity for daily life， It's widely used in the family， stations， terminals， theaters， offices and other places， to people's lives， study， work great The system uses a single chip for the master chip AT89S52， realized the time， date display， modify and time functions， and power-down situation with time to maintain the function of In this paper， AT89S52-based production of single-chip electronic Papers At89s52 chip-based CS-III experiment box， the clock design， the use of the experimental box for 8-bit digital tube， when minutes and seconds and date display， keyboard with me in the time of the modification and alarm clock settings， including school modules， the number of days the month of processing module， a time when every minute modules， output modules and date selection Thus achieve the realization of the electronic
