AB0805 RTC 모듈 -I2C
(RTC 20 CLICK)
개요
- 본 제품은 AB0805 RTC 모듈 -I2C 입니다.
- AB0805칩을 탑재하고 있습니다.
- I2C 인터페이스를 가지고 있으며, 년도, 달, 날, 시간, 분, 초에 대한 정보를 제공합니다.
특징
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HOW DOES IT WORK?
RTC 20 Click is based on the AB0805, a low-power, real-time clock (RTC) time-keeping device from Abracon LLC. The AB0805 is configured to transmit calendar and time data to the MCU based on a 32.768kHz quartz crystal and comes with 256 bytes of general-purpose RAM. It reads and writes clock/calendar data from and to the MCU in units ranging from seconds to the last two digits of the calendar year, providing seconds, minutes, hours, dates, days, weeks, months, years, and century information. The end-of-the-month date is automatically adjusted for months with fewer than 31 days, including corrections for the leap year until 2199.
This Click board™ communicates with the MCU using the standard I2C 2-Wire interface to read data and configure settings, supporting a Fast Mode operation up to 400kHz. By utilizing an automatic backup switch feature, this RTC can use an external power source (220mF supercapacitor) when there is no power supply on its main power terminals, thus allowing for uninterrupted operation.
Besides an automatic backup switchover circuit, the AB0805 also has some flexible inputs that can aggregate various interrupt sources to an MCU. Based on this, functions like external interrupt or watchdog timer reset could be found on this Click board™ routed on the EXT and WDI pins of the mikroBUS™ socket, as well as the primary and secondary interrupt signals routed on the IR1 and IR2 pins of the mikroBUS™ socket. In addition to the alarm/interrupt feature, the IR1 signal also provides the selectable-frequency square wave signal (512Hz default value).
This Click board™ can only be operated with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used as a reference for further development.
SPECIFICATIONS
Type RTC Applications Can be used for various time-keeping applications, including daily alarms, metering applications, and others requiring an accurate RTC for their operation On-board modules AB0805 - real-time clock from Abracon LLC Key Features Low power consumption, programmable square-wave output, high-speed I2C interface, clock/calendar counter, 256 bytes RAM, automatic leap year compensation, automatic backup switchover, alarms for timer and watchdog functions, and more Interface I2C Compatibility mikroBUS Click board size S (28.6 x 25.4 mm) Input Voltage 3.3V