MAXIM美信时钟IC DS1302

themaxim ic ds1302 trickle-charge timekeeping chipcontains a real-time clock/calendar (rtc) and 31 bytes of static ram. theds1302 trickle-charge timekeeping chipcommunicates with a microprocessor via a simple serial interface. the rtc on thismaxim ic trickle-charge timekeeping chipprovides seconds, minutes, hours, day, date, month, and year information. the end of month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. the clock operates in either the 24-hour or 12-hour format with an am/pm indicator. interfacing the ds1302 with a microprocessor is simplified by using synchronous serial communication. data can be transferred to and from the clock/ram 1 byte at a time or in a burst of up to 31 bytes. theds1302is designed to operate on very low power and retain data and clock information on less than 1µw. thismaxim ic timekeeping chipalso features dual power pins for primary and backup power supplies, programmabletrickle charger for vcc1, and seven additional bytes of scratchpad memory.