Optional components
Real Time Clock module
Iono MKR can be shipped with an optional, factory-installed hardware real time clock with
a dedicated long-life non-rechargeable back-up battery.
The battery is only used to power the RTC chip when the main power is not available.
Depending on operating conditions it should last up to two years if the Iono MKR board is
not powered, more if the Iono MKR receives external power.
The RTC module is based on the Microchip MCP79410 real-time clock/calendar chip. It is
connected to the Arduino MKR via the I2C bus (address: 0x57 for the EEPROM and 0x6f
for the SRAM/RTCC registers).
OPTIONAL REAL TIME CLOCK MODULE AND BATTERY
Replacing the RTC backup battery
The Iono MKR RTC module uses a
CR1025
Lithium / Manganese Dioxide (Li/MnO2)
battery.
Improper handling of lithium batteries can result in an explosion of the batteries and/or
release of harmful substances.
Worn-out or defective batteries can compromise the function of this product.
WARNING
18
Iono MKR User Guide
