Description
Module with real time clock and backup battery (battery included). It allows you to read the time in hours, minutes, and seconds, date: month, day, year. It has 32 KB of EEPROM. The communication interface is an I2C bus(SDA and SCL), data update frequency is 1 Hz (1 second). It is the output of the temperature sensor DS18B20.
| The product is compatible with Arduino The connect system makes it easy available in the GitHub library for users of Arduino. |
Connection
The supply voltage of5 Vis connected to the terminal marked with the same symbol. The I2C bus must be connected to the outputs SCL– clock line andSDA – data line. PinSQis the output of a rectangular signal with the selected frequency (see page 3 of the documentation).GNDis the ground system.
| PIN | DESCRIPTION |
|---|---|
| SQ | The output of the square wave signal. |
| DS | The output of the temperature sensor DS18B20. |
| SCL | Clock line of I2C interface. |
| SDA | Data line of I2C interface. |
| VCC | The supply voltage of 5 V. |
| GND | The ground of the system. |
| BAT | The battery output. |
Connectors
Outputs are solder fields for soldering goldpin connectors- 2.54 mm raster (not included). Thanks to them, it is possible to connect the system with the breakout board or the main module (for example,STM32Discovery or Arduino) via wires.
Specification
- Supply voltage: 5 V
- Current consumption: less than 500
- The interfaceof communication: I2C / TWI (SDA, SCL)
- Update rate: 1 Hz (1 second)
- Available data:
- Time: time (AM, PM), minute, second
- Date: month, day, year
- Data storage using batteries (not included)
- Accurate calendar up to 2100
- Memory EEPROM: 32 KB
- The dimensions of the plate: 28 x 28 mm
Useful links |
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