DS1302 Real Time Clock (RTC) Module

318 temporary data storage RAM
Working current of 2.0V, less than 300nA
Simple 3 wire interface
Compatible with TTL Vcc=5V

The real-time clock/calendar circuit provides seconds, hours, days, weeks, months, years of information, a number of days in the month and leap year can automatically adjust. The clock operation instructions through the AM/PM decided to use 24 or 12-hour format.