KAmodRPI RTC - Precise Real Time Clock Module

Description

A precise real-time clock module - RTC, designed for Raspberry Pi series computers. It is based on the DS3231 system, which has been connected to a battery that supports its operation in the event of a main power failure. Communication with the RTC clock takes place via the I2C interface.
The DS3231 system is a complete RTC clock, which is distinguished by high precision in time measurement. Excellent parameters were obtained by integrating a quartz resonator in the structure of the system and using temperature compensation. There is a socket for a CR1220 battery on the board, which allows the clock to operate even in the absence of main power. The supply voltage required for correct operation is in a wide range of 2.3….5.5 V.

Features

• Based on the DS3231 RTC clock
• Clock with integrated quartz resonator and temperature compensation
• The time measurement error declared by the manufacturer of the DS3231 system does not exceed 2 minutes per year, when operating at a temperature in the range of -40...+85 ºC
• Calculates seconds, minutes, hours, days of the week, months and year
• Communication via the I2C interface (400 kHz)
• Includes a socket for a CR1220 backup battery
• Current consumption from the backup battery does not exceed 0.1 uA
• Optional interrupt output (INT) / rectangular signal (SQW)
• Optional reset output activated by a low supply voltage level (RST)
• Requires a power supply with a voltage in the range of 2.3….5.5 V
• Board dimensions 21x20 mm, height approx. 8 mm (without socket goldpin)

Included

• Assembled and powered-up module
• CR1220 battery
• Additional female-male connector for connecting the module to a Raspberry Pi computer equipped with a radiator