The temperature changes (the temperature changes the oscillationįrequency very very very slightly but it does add up!) This Good, but those crystals have slight drift, particularly when Most RTCs use an external 32kHz timing crystal that is used Hey, it does exactly what it says on the tin! This Real TimeĬlock (RTC) is the most precise you can get in a small, low “Extremely Accurate I☬-Integrated RTC/TCXO/Crystal”. With rechargeable battery LIR2032, to ensure the system after power failure, the clock moves any natural normal.The datasheet for the DS3231 explains that this part is an Ds3231 use as timer generator#5 V, Clock chip high-precision clock chip DS3231,Clock Accuracy 0-40 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,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 A0A1A2 modify default address is 0x57 Size 38mm (length) 22mm (W) 14mm (height),Weight 8g,Operating voltage 3.3 - 5. 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. If the main power failure, the device can continue to provide accurate timing and temperature, performance is not affected. 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. This temperature sensor accuracy is ± 3 ° C. The device integrates a very precise digital temperature sensor, through the I2C interface to access it (as the same time). 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. In addition, RST pin is monitored as generating P reset manually. Address and data are transferred serially through an I2C bidirectional bus.Ī 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. Provides two configurable alarm clock and a calendar can be set to a square wave output. The clock operates in either the 24 hours or band AM PM indication of the 12-hour format. Less than 31 days of the month, the end date will be automatically adjusted, including corrections for leap year. RTC maintains seconds, minutes, hours, day, date, month, and year information. Integrated oscillator improves long-term accuracy of the device and reduces the number of components of the production line The device incorporates a battery input, disconnects the main power supply and maintains accurate timekeeping. DS3231 is a low-cost, extremely accurate I2C real-time clock (RTC), with an integrated temperature-compensated crystal oscillator (TCXO) and crystal.
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