RTC6 click carries Microchip’s MCP79410 Real-Time Clock/Calendar IC with built-in 64 bytes of battery-backed SRAM an additional 1 Kbit of EEPROM. 64 bits of protected EEPROM requires an unlock sequence to be unlocked, which makes it suitable for storing a unique ID or other critical information. RTC6 click tracks hours, minutes, seconds, days, months, years and weekdays, with leap year compensation until the year 2399. The clock frequency is derived from an onboard 32.768KHz crystal oscillator. Backup power is supplied by a coin-cell Lithium battery. RTC6 communicates with the target board MCU through the mikroBUS I2C interface (SCL, SDA) along with a multifunction pin (MFP, in place of default mikroBUS INT pin). The multifunctional pin (MFP) can be configured as an alarm, a square wave frequency output, or a general purpose output. The board is designed to use either a 3.3V or a 5V power supply.
Real Time Clocks (RTCs for short) Little attention is payed to the little piece of silicon on your board that is responsible for counting every second of every day. What is taken for granted is the fact that most of your protocols, like tcp, require some reference to time.