RTC DS1302 valós idejű óramodul AVR ARM PIC SMD-hez arduino-hoz
RTC DS1302 Real Time Clock Module For AVR ARM PIC SMD for arduino
DS1302 real-time clock module
DS1302 is a trickle charge clock chip introduced by DALLAS, which contains a real-time clock/calendar and 31 bytes of static RAM, and communicates with the microcontroller through a simple serial interface. The real-time clock/calendar circuit provides information of seconds, minutes, hours, days, weeks, months, and years. The number of days in a month and the number of days in a leap year can be adjusted automatically. Clock operation can be determined by AM/PM indication to adopt 24 or 12 hour format. The DS1302 and the single-chip microcomputer can simply use the synchronous serial way to communicate, only three ports 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 a byte or burst of up to 31 bytes. The DS1302 has very low power consumption when working, and the power is less than 1mW while maintaining data and clock information
Main performance indicators of DS1302:
★ The real-time clock has the ability to calculate 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
★ Serial I/O port mode makes the number of pins less
★ Wide range of working voltage 2.0 5.5V
★ When the working current is 2.0V, less than 300nA
★ There are two transmission methods when reading/writing clock or RAM data: single-byte transmission and multi-byte transmission character group method
★ 8-pin DIP package or optional 8-pin SOIC package according to surface assembly
★ 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
The parameters of the DS1302 real-time clock module are as follows:
1. The PCB is a single panel, size: 44mm*23mm*1.6mm
2. With 4 positioning holes, diameter 3.1mm
3. The backup battery is Celestial CR2032, voltage 3V, current 260mAh, non-rechargeable battery. The theoretical data retention time is more than 10 years!
4. The crystal oscillator is 32.768KHz, imported from Japan, the matching capacitance is 6pF, and the size is 2*6mm
5. DS1302 is a large 8-pin direct-insertion chip made in China. There is an IC socket under the chip, which is convenient to replace and plug the chip.
6. The working voltage of the module is compatible with 3.3V/5V and can be connected with 5V and 3.3V microcontrollers
7. Working temperature: 0°---70°
Wiring method (take the provided program as an example, you can connect to any IO port, just modify the port definition in the program):
VCC→ 5V/3.3V
GND→GND
CLK→P02
DAT→P01
RST→P00
Precautions:
1. Don't connect VCC and GND reversely, so as not to burn out the chip
2.51 The P0 port of the single-chip microcomputer needs to be connected with a pull-up resistor. If your single-chip microcomputer is not connected with a pull-up resistor, you can connect the data line to other ports
1005003605404651. - pingto