Allnet 136381 Development board battery Accessories for development boards

RTC DS3231 AT24C32 Memory Real Time Clock IIC Module for Arduino AVR UNO ARM. The DS3231 module is an accurate IIC real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. It can query seconds, minutes, hours, day, date, month, and year. The date is automatically adjusted, including corrections for leap years. The clock operates in either 24-hour or AM/PM mode in 12-hour format. The module provides two configurable "alarms" and a calendar. The square wave output is programmable. Address and data are transmitted bidirectionally via an IIC or I2C bus. A precision temperature-compensated reference voltage and a comparator circuit monitor the status of VCC to quickly detect power failures. The IC has an integrated, highly accurate digital temperature sensor that can be queried via the I2C interface. The module includes a battery.

Technical Specifications:

• Operating voltage: 3.3 to 5.5 V
• RTC chip: DS3231
• Clock accuracy: 0-40 °C, 2ppm
• Calendar with 2 "alarms"
• Programmable square wave output
• EEPROM: AT24C32 (storage capacity 32K)
• IIC bus interface, maximum transmission speed of 400 kHz (at VCC 5V)
• Can be cascaded with other I2C modules
• Battery CR2032, RTC continues to run standalone during power failure
• Module dimensions L x W x H approximately: 38 x 22 x 15 mm (length with pin header approximately 44 mm)
• Weight approximately 8 g

Package Includes:

• 1 piece DS3231 module ready to use (without CR2032 battery).