RTC module DS3231 with I2C interface

Overview:

• HW-084A DS3231 I2C Real Time Clock (RTC) IIC Module
• High precision clock module memory module 
• Size: L43mm x W22mm x H12mm
• Weight: 5.1g
• Working voltage: 3,3-5,5V
• High precision clock chip: DS3231
• Clock accuracy 0-40 ° C, accuracy 2ppm, annual error of about 1 minute
• Memory chip AT24C32 (memory capacity 32K)

• With 2 calendar alarms
• Programmable square wave output
• The real time clock generates seconds, minutes, hours, weeks, dates, months and years and provides a leap year observation valid until 2100
• The chip has its own temperature sensor with an accuracy of ± 3 ° C.
• IIC bus interface, transmission speed 400 kHz (At 5V supply voltage)
• Can cascade other IIC devices, the address can be changed by shorting the solder bridges A0 / A1 / A2
• The default address for I2C is 0x57 (Eeprom) and 0x68 (RTC)

Pinout:

• SCL → A5
• SDA → A4
• VCC → 5V
• GND → GND

Helpful links:

• Manual (draeger-it.blog)

Scope of supply:

• 1x RTC module DS3231 with I2C interface