4PCS DS3231 AT24C32 High Precision Clock Module IIC Module Storage Module Arduino

4PCS DS3231 AT24C32 High Precision Clock Module IIC Module Storage Module Arduino

Description:
- Low-cost, extremely accurate I2C real-time clock (RTC),  with an integrated temperature-compensated crystal oscillator (TCXO) and  crystal.    
- The device incorporates a battery input,  disconnect the main power supply and maintains accurate timekeeping.    
- Integrated oscillator improve long-term accuracy  of the device and reduces the number of components of the production line.    
- DS3231 available in commercial and industrial  temperature ranges, using a 16-pin 300mil SO package.    
- 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.    
- 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.     
- /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).    
- 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.

Module parameters:    
- Size: 38mm (length) * 22mm (W) * 14mm (height)    
- Operating voltage :3.3 - 5 .5 V    
- clock chip: high-precision clock chip DS3231    
- Clock Accuracy :0-40 Degree range, the accuracy 2ppm,  the error was about 1 minute    
- Calendar alarm clock with two    
- Programmable square-wave output    
- Real time clock generator seconds, minutes, hours,  day, date, month and year timing and provide valid until the year 2100 leap year  compensation    
- Chip temperature sensor comes with an accuracy of  ± 3 Degree    
- Memory chips: AT24C32 (storage capacity 32K)    
- 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    
-  to ensure the  system after power failure, the clock move any natural normal    
- Wiring instructions (with Arduino uno r3 for  example):
SCL → A5
SDA → A4
VCC → 5V
GND → GND