Features:

real-time clock with 2100 can be calculated before the seconds, minutes, hours, days, weeks, months, years of ability, as well as leap year adjustment

 31 8-bit temporary data storage RAM

 Serial I / O port mode makes the pin count the least

Wide operating voltage 2.0V

 working current 2.0V, less than 300nA

Read / write clock or RAM data, there are two transfer methods Single byte transfer and multi-byte transmission character group mode

8-pin DIP package or optional 8-pin SOIC package according to surface mount

simple

3-wire interface  compatible with TTL Vcc = 5V

Optional industrial temperature range -40 +85

dual power supply for the main power supply and backup power supply

DS1302 real-time clock module parameters are as follows:

1.PCB for the single-panel, size: 44mm * 23mm * 1.6mm

2. With 4 positioning holes, diameter 3.1mm

3. Backup battery for the authentic celestial sphere CR2032, voltage 3V, current 260mAh, non-rechargeable battery. Theoretical data retention time greater than 10 years!

4. Crystal 32.768KHz, Japan imported crystal, matching capacitance of 6pF, size 2 * 6mm

5.DS1302 8-pin plug-in large chip made, the chip below IC Block, easy to replace and plug the chip

6. Module operating voltage is compatible with 3.3V / 5V, and 5V and 3.3V single-chip connection

7. Operating temperature: 0 ° --- 70 °

Wiring method (to provide the program as an example, you can access any IO port, modify the port definition in the program can be):

VCC → + 5V / 3.3V 

GND → GND 

CLK → P02 

DAT → P01 

RST → P00