DS1302 Real Time Clock Module (No Battery)

DS1302 Real Time Clock Module is a trickle charge clock chip, containing a real-time clock/calendar and 31 bytes of static RAM, communicating through serial interface simple and single-chip microcomputer. The real-time clock/calendar circuit provides seconds, hours, days, weeks, months, years of information, a number of days in the month and leap year can automatically adjust. The clock operation instructions through the AM/PM decided to use a 24 or 12-hour format.

Between DS1302 and single-chip microcomputer can simply use synchronous serial communication method, only three lines:

(1) RST

(2) I/O reset the data line

(3) SCLK serial clock.

Clock /RAM read/write data to a byte character set or as many as 31-byte communication. DS1302 work power consumption is very low to keep the data and clock information when power is less than 1mW

Features:

• The real-time clock counts minutes, seconds, date, hours, month day of the week, year and leap-year compensation up to 2100.
• 318 temporary data storage RAM
• Working current of 2.0V, less than 300nA
• Read / Write clock or RAM data with two kinds of mode of single-byte transfer mode and multi-byte character set
• 8 pin DIP package or optional 8 pin SOIC package based on the surface assembly
• Simple 3 wire interface
• Compatible with TTL Vcc=5V
• Double power supply pipe for main power and backup power supply.

Specifications:

Material	Plastic, Metal
Operating Voltage Range	2.0V – 5.0V
Operating Currency	Less than 300nA at 2.0V
Working Temperature Range	0C-85C
Mount Hole Dia	3.1mm / 0.12″
Crystal Oscillator Frequency	32.768K
Length (mm)	44
Width (mm)	23
Height (mm)	1.6
Weight (gm)	6

Wiring method (to provide procedures, for example, can pick up any IO port, in the procedure to modify the port definitions :

• VCC:+5V/3.3V
• GND: GND
• CLK: P02
• DAT: P01
• RST: P00

Useful Links:

• Arduino DS1302 Real Time Clock 

Package Includes:

• 1 x DS1302 RTC Real Time Clock Module (No Battery)

Note:

• VCC and GND do not reverse, so as not to burn the chip
• 51 SCM P0 port to receive a pull-up resistor, if your computer is not connected pull-up resistor, the data can be the string to the other port.