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Feature

Clock operation by AM / PM indicator decided to use 24 or 12 hour format
Clock / RAM read / write data in a byte or up to 31 bytes of character set type communication
DS1302 between the microcontroller can simply adopt the way synchronous serial communication port only used three lines
It contains a real-time clock / calendar and 31 bytes of static RAM, via a simple serial interface to communicate with the microcontroller
Real-time clock / calendar circuit provides seconds, minutes, hours, days, weeks, months, years of information, the number of days per month and leap year automatically adjust the number of days

Description

Features:
Item Name: DS1302 Real Time Clock Module.
Color: Blue + Silver + Multi-Colored.
Material: PCB.
Weight: 0.28 oz (8 g).
Dimensions: 1.97 in x 0.98 in x 0.43 in (5*2.5*1.1cm)
Working temperature: 0- 70.

DS1302 work to maintain low power consumption data and clock information when power is less than 1mW.
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.

Simple 3-wire interface.
Serial I / O ports such a way that a minimum number of pins.

DS1302 real time clock module parameters are as follows:
PCB single panel, size: 44mm * 23mm * 1.6mm
With four positioning holes, diameter 3.1mm
Backup battery is genuine celestial CR2032, Voltage 3V, current 260mAh, non-rechargeable batteries.
Theoretical data retention time is more than 10 years!
DS1302 is made large 8-pin DIP chip, chip below IC socket for easy replacement and swap chips
Module operating voltage compatible 3.3V/5V, can be connected with 5V and 3.3V microcontroller

Note:
1. VCC and GND Do not reversed, it would burn the chip.
2. C51 MCU P0 port requires pull-up resistor, if your device does not have a pull-up resistor can be connected to other ports data lines.

Package included: 1 x DS1302 Module
1 x CR2032 battery