1PCS Great IT I2C RTC DS1307 AT24C32 Real Time Clock Module For AVR ARM PIC Tiny RTC I2C modules memory DS1307 clock
 
 
DS1307 I2C real time clock chip (RTC)
24C32 32K I2C EEPROM memory
Using CR2032 rechargeable lithium battery and charging circuit with
DS1307 with battery backup can not solve the problem of literacy.
Fully charged, can provide DS1307 timing 1 year.
Compact design, 27mm * 28mm * 8.4mm
Leads to the DS1307 clock pin provides a clock signal for the microcontroller.
Other I2C devices can be cascaded.
DS1307 is a low power, with 56 bytes of non-volatile RAM clock calendar full BCD code real-time clock chip, the address and data via a two-wire bidirectional serial bus transmission, the chip provides seconds, minutes, hours and other information , the number of days of each month can be automatically adjusted. And there is a leap year compensation. AM / PM flag determines clock operates in 24 hours or 12 hours mode, the chip has a built-in power-sense circuit, brownout detect, and battery switching function.
DS1307 features:
Available on the second, hour, minute, number of days per month, month, week, count the number of days, and has a leap year compensation. Record on the line in 2100.
56 bytes of non-volatile RAM
Two-wire serial interface
Programmable square-wave output
Automatic power-down detection and switching circuit
In battery backup mode, power consumption is less than 500nA
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32718855644 - greatit