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Product description: Fermion - DS3231 I2C real-time clock RTC module - DFRobot DFR0819
A real-time clock (RTC) module using the DS3231 chip, which integrates a quartz resonator and temperature compensator to improve the accuracy of the module. Over a temperature range of -40°C to 85°C, the accuracy of the DS3231 is ±3.5 ppm (±0.3024 seconds/day). The Fermion DS3231 is equipped with a battery slot. This allows it to maintain high timing precision even when the main power supply to the device is interrupted.
A CR1220 battery is not included. Please purchase it separately.
Fermion - DS3231 RTC real-time clock module.
Battery connector for the real-time clock module.
Features
Fermion DS3231 is equipped with a battery socket. This allows it to maintain high timing precision even when the main power supply to the device is interrupted. The RTC provides information about seconds, minutes, hours, day, week, month and year. It can automatically adjust the date at the end of the month, including leap year adjustments. The clock operates in 24-hour or 12-hour format with AM / PM indicator. There are two programmable alarms and a programmable rectangular wave output. In addition, the RST pin can be used as a button input to reset the microprocessor.
Pinout description
- VCC - power supply
- GND - ground
- SCL - I2C data line
- SDA - I2C clock line
- INT - interrupt at low level or 1 Hz square wave output
- RST - calibration reset pin
- 32 - kHz pulse output
Manufacturer provides a guide for RTC module with example code.
Leads schematic of the module.
Example of connection to the board.
Product advantages
- Internal integrated quartz resonator ensuring low drift
- Internal integrated temperature compensator ensuring small temperature drift
- Full calendar function
- Two programmable alarms
- Product features high precision and low power consumption, especially suitable for use in high precision and low power projects
Applications
- Event reminder
- External MCU wake-up source
Module specification
- Supply voltage: 3.3 V to 5.5 V
- I2C address: 0x68
- Timing range: from 1970 to 2100
- Operating environment temperature: from -40°C to 85°C
- Timing accuracy: ±3.5 ppm (±0.3024 seconds / day)
- Product size: 22.5 x 21 mm
Set contents
- Fermion - RTC DS3231 I2C real time clock module - 1 pc.
- Self-soldering strip - 1 pc.
RTCDS3231 real time clock module.
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