DS3231 AT24C32 IIC I2C RTC Real Time Clock Module

RTC maintains seconds, minutes, hours, day, date, month, and year information. Less than 31 days of the month, the end date will be automatically adjusted, including corrections for leap year. The clock operates in either the 24 hours or band / AM / PM indication of the 12-hour format. Provides two configurable alarm clock and a calendar can be set to a square wave output. Address and data are transferred serially through an I²C bidirectional bus.

A precision temperature-compensated voltage reference and comparator circuit monitors the status of VCC to detect power failures, provide a reset output, and if necessary, automatically switch to the backup power supply. In addition, / RST pin is monitored as generating μP reset manually.

Save time and high precision addition, DS3231 also has some other features that extend the system host of additional features and a range of options. The device integrates a very precise digital temperature sensor, through the I²C * interface to access it (as the same time). This temperature sensor accuracy is ± 3 ° C. On-chip power supply control circuit can automatically detect and manage the main and standby power (i.e., low-voltage battery) to switch between the power supply. If the main power failure, the device can continue to provide accurate timing and temperature, performance is not affected. When the main power re-power or voltage value returns to within the allowable range, the on-chip reset function can be used to restart the system microprocessor.

Features:

• Highly Accurate RTC Completely Manages All Timekeeping Functions
  • Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year, with Leap-Year Compensation Valid Up to 2100
  • Accuracy ±2ppm from 0°C to +40°C
  • Accuracy ±3.5ppm from -40°C to +85°C
  • Digital Temp Sensor Output: ±3°C Accuracy
  • Register for Aging Trim
  • Active-Low RST Output/Pushbutton Reset Debounce Input
  • Two Time-of-Day Alarms
  • Programmable Square-Wave Output Signal
• With output TTL level signal indication
• Can be connected directly to the microcontroller output IO port
• Anti-interference ability
• Connect the microcontroller to achieve the touch switch function
• Standard 2.54mm pin to do input and output connections
• Surrounded by four fixed mounting holes

Specification:

• Clock chip: High-precision clock chip DS3231
• Memory chips: AT24C32 (storage capacity 32K)
• Operating voltage: 3.3 – 5.5V DC
• Clock Accuracy: 0~40 range, the accuracy 2ppm, the error is about 1 minute; With two calendar alarm clock; Programmable square-wave output
• Real time clock generator seconds, minutes, hours, day, date, month and year timing and provides valid until 2100 with Leap Year Compensation
• Chip temperature sensor accuracy: +/- 3ºC
• IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V)
• Can be cascaded with other IIC device, 24C32 addresses can be shorted A0/A1/A2 modify default address is 0x57
• Suggest to add a rechargeable battery CR2032 to ensure the clock move normal as system power failure
• Size: 38mm (length) x 22mm (W) x 14mm (height)
• Weight: 8g