Clock Module is sensory integration,for science kits for kids,science projects,robot car on high school,primary school,secondary school.
DS1302 real time clock module

DALLAS DS1302 is the company launched trickle charge the clock chip, which 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.

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

Real-time clock with energy calculations before 2100 seconds, minutes, hours, day, week, month, year capacity, as well as the ability to leap year adjustment

• 31 8 temporary data storage RAM
• Serial I / O port pin makes the least number of ways
• Wide range of operating voltage 2.0V – 5.5V
• When The working voltage is 2.0V, the current is less than 300nA
• Read/write clock or RAM data have two transmission way: Single-byte / many bytes group
• 8 feet DIP assembly or optional 8 feet SOIC encapsulation according to surface assembly
• Simple 3 line interface
• Optional industrial temperature range -40°C to +85°C
• Dual power tube for the main power and backup power supply
• TTL compatible(Vcc = 5V)
• PCB single panel
• 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!
• Crystal 32.768KHz, Japan imported crystal, matching capacitance 6pF, size 2 * 6mm
• 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
• Working temperature: 0°— 70°
• Wiring methods (procedures in order to provide an example, you can access any IO port, modify the port definition in the program can be):
  
  • VCC → +5 V/3.3V
  • GND → GND
  • CLK → P02
  • DAT → P01
  • RST → P00

• Module voltage compatible with 3.3V / 5V, can be connected to 3.3V or 5V SCM
• 3v 260mAh backup battery(not rechargeable batteries)
• Crystal oscillator 32.768KHz
• Working temperature 0°C to 70°C
• 4 positioning holes, diameter 3.1mm
• Size: 44 x 23 x 1.6mm