2 Pcs DS1302 real time clock module with battery CR2032

DS1302 main performance indicators: ˜… real-time clock can be calculated before 2100 seconds, minute, hour, day, week, month, year capacity, as well as leap year adjustment capacity ˜… 31 8-bit temporary data storage RAM ˜… serial I / O port, making the least number of pins ˜… wide range of operating voltage 2.0 5.5V ˜… Operating Current 2.0V, less than 300nA ˜… read / write clock or RAM data when there are two kinds of transmission mode in a single byte transfer and multi-byte the transmitted character group way ˜… 8-pin DIP package or an optional 8-pin SOIC package surface mount ˜… simple 3-wire interface ˜… Vcc = 5V TTL compatible ˜… Optional industrial temperature range of -40 to +85 ˜… dual supply pipe for the main power and backup power supply DS1302 real-time clock module parameters are as follows: 1.PCB single panel size: 44mm * 23mm * 1.6mm 2 with four positioning holes, diameter 3.1mm 3. Spare batteries the genuine celestial CR2032 Voltage 3V, current 260mAh, non-rechargeable batteries. The theoretical data retention time is more than 10 years! Crystal 32.768KHz, Japan imported crystal, matching capacitance 6pF, and size 2 * 6mm 5.DS1302 8-pin DIP made large chip, chip below IC sockets for easy replacement and plug chip 6 module operating voltage compatible 3.3V/5V, can be connected with 5V and 3.3V microcontroller Operating Temperature: 0 ° --- 70 ° Wiring methods (provided by the program, for example, you can pick any IO port port definition can be modified in the program): VCC †' +5 V/3.3V GND †' GND CLK †' P02 DAT †' P01 RST †' P00 Note: The 1.VCC to GND Do not reversed, it would burn the chip 2.51 MCU P0 port pull-up resistor, if your microcontroller does not have pull-up resistor, data lines connected to other ports