DS1302 RTC Module with CR1220 Battery - Robocraze

DS1302 RTC Module with CR1220 Battery

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The DS1302 trickle-charge timekeeping chip module with battery backup contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar provides seconds,minutes, hours, day, date, month, and year information.

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Integrated Circuits

Interfacing the DS1302 with a microprocessor is simplified by using synchron
ous serial communication. Only three wires are required to communicate with the clock/RAM: CE, I/O (data line), and SCLK (serial clock).

Data can be transferred to and from the clock/RAM 1 byte at a time or in a burst of up to 31 bytes. The DS1302 is designed to
operate on very low power and retain data and clock information on less than 1μW.