Real time clock and extra non-volatile storage (EEPROM)Designed by EletroShields in Brazil
Important: Due to new outbreaks of COVID, post offices are suspending posting to some countries. Therefore, our store will run out of stock until January 31, 2022, which is the deadline for publishin…Read More…
Important: Due to new outbreaks of COVID, post offices are suspending posting to some countries. Therefore, our store will run out of stock until January 31, 2022, which is the deadline for publishing the list of countries that will have normalized deliveries.
IMPORTANT: we ship all our items from Brazil via priority mail or express mail (EMS), and the customer is responsible for customs release and any import duties that may be due in the destination country.
With the RTCMem Nanoshield you add a real time clock to your project, and 32KB more of non-volatile memory from an EEPROM chip embedded in the board. Interfacing with the RTC and the EEPROM memory is done through an I2C bus, using only 2 pins of your microcontroller. We provide open source Arduino libraries to access these resources.
The RTC chip on the board tracks day of month, day of week, month, year, hours, minutes and seconds. In the absence of a power supply, a lithium battery allows keeping track of the time for up to 10 years¹. Unlike the majority of the RTC boards in the market, where the clock can show a deviation of up to ±2 seconds per day (±20ppm), the RTCMem Nanoshield has a trimmer that is factory calibrated, such that the maximum deviation is ±0.5 seconds per day (±5ppm)¹.
The RTC chip also contains alarm configuration based on day of week, hours, minutes and seconds, possibly generating an event at a predetermined time. This event can cause an interrupt, that can be verified either via the INT pin or via an I2C command. Similar to the alarm feature, there is also a timer feature that can generate an event after a preconfigured period of time.
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Thomas | Sept. 1, 2019
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