DS1302 real time module with a battery CR2032 When powering away, electronic component module

DS1302 real time clock module

DS1302 is a trickle charging clock chip launched by Dallas. It contains a real -time clock/calendar and 31 -byte static RAM. It communicates with the single -chip microcomputer through a simple serial interface.The real time clock/calendar circuit provides information about seconds, divisions, time, day, week, month, month, and year.The clock operation can be determined by the AM/PM instructions to use a 24 or 12 -hour format.DS1302 can simply use synchronous serial methods to communicate between DS1302 and single -chip microcontroller. Only three port lines are required: (1) RST reset (2) I/O data cable (3) SCLK serial clock.Clock/RAM reading/writing data is communicated by a character group of a byte or 31 bytes.DS1302 Power consumption is very low at work and keeps data and clock information less than 1MW

DS1302 Main performance indicators:
★ The real -time clock can calculate the ability of seconds,,, time, day, week, month, and year before 2100 years, and the ability to adjust the leap year
★ 31 8 -bit temporarily stored data store RAM
★ Serial I/O port method makes the number of pipes the least
★ Wide -range operating voltage 2.0 5.5V
★ When the working current is 2.0V, it is less than 300NA
★ Reading/Write clocks or RAM data, there are two transmission methods single byte transmission and multi -byte transmission characters.
★ 8 -pin DIP packaging or optional 8 -pin SOIC packaging is assembled according to the surface
★ Simple 3 -line interface
★ Compatible with TTL compatibility VCC = 5V
★ Optional industrial-grade temperature range -40 +85
★ Dual power supply pipes are used for main power supply and backup power supply
DS1302 real time clock module parameters are as follows:

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

2. Bring 4 positioning holes, 3.1mm in diameter

3. The spare battery is the genuine celestial celestial CR2032, the voltage 3V, the current 260mAh, and the non -recharging battery.Theoretical data remains more than 10 years!

4. Crystal vibration 32.768kHz, the original imported crystal of Japan, the matching capacitance is 6PF, the size is 2*6mm

5.DS1302 is a large domestic chip with 8 -pin plugs. There is IC Block under the chip, which is convenient for replacing and inserting the chip

6. Compatible module work voltage 3.3V/5V, can be connected to 5V and 3.3V single -chip microcomputers

7. Work temperature: 0 ° --- 70 °

The wiring method (take the procedure as an example, you can take the any IO port and modify the port definition in the program):

VCC →+5V/3.3V

GND → GND

CLK → P02

DAT → P01

RST → P00

Note:

1. Do not connect withvcc and GND, so as not to burn the chip

2.51 The P0 port of the single chip machine needs to be connected to the pull -up resistance. If your single -chip machine does not connect to the pull -up resistance, you can connect the data cable to other end