DS1302 Real Time Clock Module (No Battery)
DS1302 is a trickle charge clock chip launched by DALLAS company. It contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with a single-chip microcomputer through a simple serial interface. The real-time clock/calendar circuit provides information on seconds, hours, days, weeks, months, and years. It can automatically adjust the number of days in the month and leap year. The clock operation mode is determined by the AM/PM instruction, which allows for a 24 or 12-hour format.
DS1302 and single-chip microcomputer can use a synchronous serial communication method with only three lines:
(1) RST: reset line
(2) I/O: data line
(3) SCLK: serial clock.
Clock/RAM data can be read or written as a byte character or as a communication of up to 31 bytes. DS1302 has a very low power consumption and can maintain the data and clock information with less than 1mW of power.
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
Note:
1.VCC and GND do not reverse, so as not to burn the chip
2.51 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.
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.
Specification:
Material | Plastic, Metal |
---|---|
Operating Voltage Range | 2.0V – 5.0V |
Operating Currency | Less than 300nA at 2.0V |
Woring Temprature 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 (g): | 6 |
Shipping Weight | 0.01 kg |
Shipping Dimensions | 5 × 3 × 2 cm |
Package Includes:
1 x DS1302 RTC Real Time Clock Module (No Battery)