Key Features
- Extreme Accuracy: Uses an integrated Temperature-Compensated Crystal Oscillator (TCXO) that prevents the timing drift seen in cheaper modules (like the DS1307).
- Time Tracking: Records seconds, minutes, hours, day, date, month, and year with automatic leap-year compensation until the year 2100.
- Onboard EEPROM: Many modules include an AT24C32 EEPROM chip for data logging.
- Backup Power: Holds a standard 3V CR2032 or LIR2032 battery.
Basic Pinout
- VCC: Power supply (typically 2.7V to 5.5V).
- GND: Ground.
- SDA: Serial Data (I2C).
- SCL: Serial Clock (I2C).
- SQW: Square Wave / Interrupt Output.
- 32K: 32kHz reference clock output
