Module DS1302 real time clock module CR2032 power down travel yellow version new
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DS1302 is a trickle charging clock chip introduced by DALLAS, which contains a real time clock / calendar and 31 byte static RAM, which communicates with a single chip computer through a simple serial interface. Real time clock / calendar circuits provide information on seconds, minutes, hours, days, weeks, months, and years. The number of days per month and the number of leap years can be adjusted automatically. The clock operation can be determined by AM/PM instruction in 24 or 12 hours format. The communication between DS1302 and single chip can be used in a simple serial way. It only needs three ports: (1) RST reset (2) I/O data line (3) SCLK serial clock. The read / write data of clock /RAM communicate in a byte or up to 31 byte character set. DS1302 works at low power consumption and maintains power of less than 1mW when data and clock information are maintained.
DS1302 main performance indicators:
The real time clock has the ability to calculate the seconds, minutes, hours, days, weeks, months and years before 2100, and the ability to adjust the leap year.
318 bit storage data storage RAM
Serial I/O port makes the smallest number of pins
Wide range working voltage 2 5.5V
When the working current is 2.0V, less than 300nA
When read / write clock or RAM data, there are two modes of transmission: single byte transmission and multi byte transfer character set.
8 feet DIP package or optional 8 foot SOIC package according to the surface assembly.
The simple 3 line interface
TTL compatible with Vcc=5V
Optional industrial temperature range -40 +85
Double power supply 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. with 4 positioning holes, diameter 3.1mm
3. standby battery is genuine CR2032, voltage 3V, current 260mAh, non rechargeable battery. The theoretical data kept for more than 10 years!
4. crystal oscillator 32.768KHz, Japan imported crystal oscillator, matching capacitance of 6pF, size 2*6mm
5.DS1302 for 8 feet directly into the domestic chip, chip with IC seat, easy to replace and insert chip.
The 6. module working voltage is compatible with 3.3V/5V and can be connected to 5V and 3.3V single chip microcomputer.
7. working temperature: 0 degree ---70 degrees
The connection method (take the program provided as an example, can be connected to any IO port and modify the port definition in the program).
VCC - +5V/3.3V
GND - GND
CLK - P02
DAT - P01
RST - P00
Matters needing attention：
1.VCC and GND must not be reversed to burn bad chips
2.51 the P0 port of the singlechip needs to be connected with the pull resistor. If your SCM does not have a pull resistor, you can connect the data line to other ports.
1.DS1302 real-time clock module 1 (with DS1302 chip and standby battery, before shipment has been tested function)
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