DS1302 Real-Time Clock Module With Battery CR2032 Power-Down Time Module Timing ClockItem NO.: DS1302GB

DS1302 Real-Time Clock Module

Product Information:

DS1302 is a trickle charging clock chip, which contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with the single-chip computer through a simple serial interface. The real-time clock/calendar circuit provides information about seconds, minutes, hours, days, weeks, months and years. The number of days per month and the number of days in leap years can be automatically adjusted. The clock operation can be determined in 24 or 12 hour format through AM/PM instructions. The communication between DS1302 and single-chip microcomputer can be carried out simply by synchronous serial mode. Only three port lines are needed: (1) RST reset (2) I/O data line (3) SCLK serial clock. The read/write data of the clock/RAM is communicated in the form of a byte or a character group of up to 31 bytes. The power consumption of DS1302 is very low during operation, and the power of data and clock information is less than 1mW

Main Performance Indicators:

★ Real-time clock has the ability to calculate the seconds, minutes, hours, days, weeks, months and years before 2100, as well as the ability to adjust leap years

★ 31 8-bit temporary data storage RAM

★ The serial I/O port mode minimizes the number of pins

★ Wide range working voltage 2.0 5.5V

★ When the working current is 2.0V, it is less than 300nA

★ There are two transmission modes when reading/writing clock or RAM data: single-byte transmission and multi-byte transmission

★ 8-pin DIP package or optional 8-pin SOIC package is assembled according to the surface

★ Simple 3-wire interface

★ Compatible with TTL Vcc=5V

★ Optional industrial temperature range - 40+85

★ Dual power supply tubes are used for main power supply and backup power supply

Module Parameters:

1. PCB is single panel, size: 44mm * 23mm * 1.6mm

2. With 4 locating holes, diameter 3.1mm

3. The backup battery is the authentic Tianqiu CR2032, with a voltage of 3V and a current of 260mAh. It is a non-rechargeable battery. The theoretical data shall be kept for more than 10 years!

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

5. The DS1302 is a 8-pin direct-insert domestic large chip, with an IC base under the chip, which is convenient for replacing and plugging the chip

6. The working voltage of the module is compatible with 3.3V/5V and can be connected with 5V and 3.3V single chip computers

7. Working temperature: 0 ° -- - 70 °

Wiring Method:

★ VCC→+5V/3.3V

★ GND→GND

★ CLK→P02

★ DAT→P01

★ RST→P00

Matters Needing Attention:

1. VCC and GND must not be connected reversely to avoid burning the chip

2.51 The P0 port of the single-chip microcomputer needs to be connected with a pull-up resistance. If your single-chip microcomputer is not connected with a pull-up resistance, you can connect the data line to other ports