I2C总线，24C02 EEPROM 应用 定时器计时数码管显示0-60，用EEPROM实现每次关机后开机数码管计时的显示数从关机前的那个数开始显示。-I2C bus, 24C02 EEPROM application timer timer digital display 0-60, with EEPROM boot after shutdown to achieve each time the digital tube display several numbers from the shutdown that began before the show.