Memory module IIC module high precision clock module DS3231 AT24C32

1. Size: 38mm(length) x 22mm(width) x 14mm(height).
2. Weight: 8 g
3. Working voltage: 3.3-5.5V.
4. Clock chip: DS3231 high precision clock chip
5. Clock accuracy: within 0-40 degrees C, accuracy 2ppm, annual error of about 1 minute
6. With 2 calendar alarms
7. Programmable square wave output
8. The real time clock generates seconds, minutes, hours, week, date, month and year and provides leap year compensation valid for up to 2100 years
9. The temperature sensor inside the chip is accurate to +/- 3 degrees C
10. Memory chip: AT24C32 (32K memory capacity)
11. IIC bus interface, high transmission speed 400KHz (when working voltage is 5V)
12. Can cascade other IIC devices, 24C32 address can be changed by short circuit A0/A1/A2, default address is 0x57
13. With LIR2032 rechargeable battery to ensure the watch works normally even after the system is turned off
14. Packaging: Anti-static single packaging
15. Wiring instructions (taking Arduino uno r3 as an example):
SCL - A5
SDA - A4
VCC - 5V
GND - GND
16. DS3231 is a high-precision, low-cost I2C real-time clock (RTC) with integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device contains a battery input, which can maintain accurate timing when the main power is disconnected. The integrated crystal oscillator improves the long-term accuracy of the device and reduces the number of components in the production line. The DS3231 offers commercial and industrial temperature ranges and is available in a 16-pin 300mil SO package.
17. RTC saves information of seconds, minutes, hours, day, date, month and year. Months less than 31 days will automatically adjust the end of the month, including corrections for leap years. The clock working format can be 24-hour or 12-hour with / AM / PM indication. It provides two configurable calendar alarms and a configurable square wave output. The address and data are transferred serially via the bidirectional I2C bus.
Sophisticated temperature-compensated voltage reference and comparator circuits are used to monitor VCC status, detect power failures, provide reset outputs, and automatically switch to backup power when needed. Additionally, the monitor/RST pin can be used as a manual input to generate a μP reset.
18. In addition to high timing accuracy, the DS3231 also has other functions that expand the additional functions and selection range of the system host. The device integrates a highly accurate digital temperature sensor, which can be accessed via the I2C * interface (just like the clock). The accuracy of this temperature sensor is +/- 3 degrees C. The on-chip control circuit can realize automatic power detection and manage power switching between the main power supply and the backup power supply (i.e., low battery voltage). If the main power supply is turned off, the device can continue to provide accurate timing and temperature without affecting performance. When the main power is turned on again or the voltage value returns to the allowable range, the on-chip reset function can be used to restart the system microprocessor.