RTC DS1302 Real Time Clock Module for Arduino AVR ARM PIC SMD

Features: DS1302 real time clock module DALLAS DS1302 is the company launched trickle charge the clock chipÂ£Â¬ which contains a real-time clock / calendar and 31 bytes of static RAMÂ£Â¬ via a simple serial interface to communicate with the microcontroller. Real-time clock / calendar circuit provides secondsÂ£Â¬ minutesÂ£Â¬ hoursÂ£Â¬ daysÂ£Â¬ weeksÂ£Â¬ monthsÂ£Â¬ years of informationÂ£Â¬ the number of days per month and leap year automatically adjust the number of days. Clock operation by AM / PM indicator decided to use 24 or 12 hour format. DS1302 between the microcontroller can simply adopt the way synchronous serial communication port only used three lines: (1) RST Reset (2) I / O data lines (3) SCLK Serial Clock. Clock / RAM read / write data in a byte or up to 31 bytes of character set type communication. DS1302 work to maintain low power consumption data and clock information when power is less than 1mW DS1302 key performance indicators: Real-time clock with energy calculations before 2100 secondsÂ£Â¬ minutesÂ£Â¬ hoursÂ£Â¬ dayÂ£Â¬ weekÂ£Â¬ monthÂ£Â¬ year capacityÂ£Â¬ as well as the ability to leap year adjustment serial I / O ports such a way that a minimum number of pins Wide operating voltage range 2.0 5.5V 2.0VÂ£Â¬ operating current of less than 300nA Read / write clock or RAM data transfer modeÂ£Â¬ there are two single-byte and multi-byte transfer mode transmission character set 8-pin DIP package or an optional 8-pin SOIC surface mount package under Simple 3-wire interface Vcc = 5V and TTL compatible Optional industrial temperature range of -40 to +85 Dual power tubes used for the main power supply and backup power supply DS1302 real time clock module parameters are as follows: 1. PCB single panelÂ£Â¬ size: 44mm * 23mm * 1.6mm 2. With four positioning holesÂ£Â¬ diameter 3.1mm 3. Backup battery is genuine celestial CR2032Â£Â¬ Voltage 3VÂ£Â¬ current 260mAhÂ£Â¬ non-rechargeable batteries. Theoretical data retention time is more than 10 years! 4. Crystal 32.768KHzÂ£Â¬ Japan imported crystalÂ£Â¬ matching capacitance 6pFÂ£Â¬ size 2 * 6mm 5. DS1302 is made large 8-pin DIP chipÂ£Â¬ chip below IC socket for easy replacement and swap chips 6. Module operating voltage compatible 3.3V/5VÂ£Â¬ can be connected with 5V and 3.3V microcontroller 7. Working temperature: 0°--- 70° 8. 4.3x 2.3cm Wiring methods (procedures in order to provide an exampleÂ£Â¬ you can access any IO portÂ£Â¬ modify the port definition in the program can be): VCC → +5 V/3.3V GND → GND CLK → P02 DAT → P01 RST → P00 Note: 1. VCC and GND Do not reversedÂ£Â¬ it would burn the chip 2. C51 MCU P0 port requires pull-up resistorÂ£Â¬ if your device does not have a pull-up resistor can be connected to other ports data lines

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