Description

DS3231 AT24C32 RTC time module – precision clock on I2C

Real-time clock module.

The module allows you to read the time in the form of hour, minute and second and the date: month day, year.

The battery used in this module is the popular CR2032 Lithium Cell 3V battery.

The module charges the battery by itself.

Diode prevents „backflow” of current.

Features of the time module

• DS3231 real-time clock module
• Allows you to read the time in the form of hour, minute and second and the date: month day, year.
• The communication interface is the I2C bus (SDA and SCL lines)
• The data refresh rate is 1 Hz (1 second).
• Available data: Time: hour (AM, PM), minute, second, Date: month, day, year Accurate calendar up to the year 2100
• The module has goldpin leads, allowing it to be connected to any runner kit or dedicated circuit board using available wires.
• Compatible with arduino UNO and MEGA 2560
• Application for contact boards, runtime modules, arduino, etc.

Technical data of the module

• DS3231 real-time RTC clock module
• It has an AT24C32 memory
• Chip DS3231
• Power supply 2.3-5.5V
• Battery cage: CR2032 (not included)
• Current consumption: less than 200 nA
• SPI bus communication (SDA, SCL)
• Bus address: 0x68
• Communication interface: I2C
• Refresh rate: 1 Hz (1 second)
• Specifies: seconds, hours, minutes, months, days of the week and years
• Accuracy:
  • at 0 °C to +40 °C: +/- 2 ppm
  • at -40 °C to +85 °C: +/- 3.5 ppm
• Dimensions: 38x22mm

Connecting

• The 5 V supply voltage is connected to the pin marked with the same symbol.
• The I2C bus should be connected to the leads of the
  • SCL – clock line
  • SDA – data line.
• The SQW pin is the output of a rectangular signal with the selected frequency
• GND is the ground of the circuit.

Video presentations