Arduino Realtime Clock DS1302 RTC Module

DS1302 ( with battery ) is introduced trickle charge the clock chip, containing a real-time clock / calendar and 31 bytes of static RAM, via a simple serial interface

to communicate with the microcontroller. Real-time clock / calendar circuit provides seconds, minutes, hours, days, weeks, months, years of

information, the number of days per month and leap year automatically adjust the number of days. Clock can be done by the AM / PM or 12 

decided to use 24 hour format. Between the DS1302 and the microcontroller can simply use the synchronous serial communication mode, used 

only three port lines: (1) RST Reset (2) I / O data lines (3) SCLK serial clock. Clock / RAM read / write data to a byte or up to 31 bytes of character 

set way communication. DS1302 low-power work to maintain the data and clock information when power is less than 1mW

Real time clock with the year 2100 to calculate the seconds, minutes, hours, days, weeks, months, years, the ability, as well as the ability to leap 

year adjustment

1.31 8 temporary data storage RAM

2.Serial I / O port pin makes the least number of ways

3.Wide range of operating voltage 2.0 5.5V

4.Current 2.0V, less than 300nA

5.Read / write clock or RAM data transmission when there are two single-byte transmit and multi-byte character sets transfer mode

6.8-pin DIP package or optional 8-pin SOIC package assembly according to the surface

7.simple 3-wire interface

8.Vcc = 5V and TTL-compatible

9.Optional industrial temperature range -40 to +85

10.Dual power tube for the main power and backup power supply