DS1302 is DALLAS The company launched a trickle charging clock chip that contains a real-time clock / calendar and 31 Byte static RAM Through a simple serial interface to communicate with the microcontroller. Real time clock / calendar circuit provides seconds. Minutes. Days. Weeks. Months. Years of information. The number of days per month and leap days can be automatically adjusted Instructions to use 24 or 12 hour format.DS1302 It can be used to synchronize the communication between the single chip and the single chip. Only three ports are needed: (1) RST Reset (2) I/O data line () SCLK serial clock. Clock /RAM Read / write data in one byte or up to 31 Byte character group communication.DS1302 Low power consumption while maintaining data and clock information power is less than 1mW
Main performance index of DS1302:
You can calculate the 2100 real time clock Years ago. Minutes. Hours. Days, weeks, months, years, and the ability to adjust the leap year
* 318 temporary data storage RAM
* I/O serial port makes the minimum number of pins
The working voltage range of 2 5.5V wide.
By the working current of 2.0V, less than 300nA
Read / write clock or RAM. There are two types of data transfer: single byte transfer and multi byte character set
* 8 pin DIP package or optional 8 pin SOIC package based on the surface assembly
A simple 3 line interface.
Compatible with TTL Vcc=5V.
* optional industrial temperature range of -40 +85
This dual power tube for main power 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 with 4 positioning holes. Diameter 3.1mm
3 standby battery for genuine celestial sphere CR2032, voltage 3V. current 260mAh. non rechargeable battery. Theoretical data retention time of more than 10 years!
4 crystal 32.768KHz. Japan imported crystal oscillator. Matching capacitance is 6pF. size 2*6mm
5.DS1302 is a 8 pin inline large chip. The chip has a IC block
6 module work voltage compatible 3.3V/5V. can be connected with 5V and 3.3V microcontroller
Wiring method to provide the program as an example. Can be connected to any IO port:
Matters needing attention:
1.VCC and GND do not have to counter
2.51 MCU P0 port needs to be connected to the pull resistance. If you do not have a single chip connected to the pull resistance