The Wio Extension - RTC is an extension board for Wio LTE, it can provide the Real-Time Clock function via the I2C port. This board is based on NXP PCF8523 chip, which can provide year, month, day, weekday, hours, minutes, and seconds information.
This board is powered by a Micro-USB port, communicates with the Wio LTE via an I2C port, and we also provide a USB power output that can be turned off/on by an on-board switch, so that you can use the Wio Extension - RTC board to power the Wio LTE. When the power supply to Wio boards ( Like the following picture), the standby current of the whole system is less than 1 uA.
Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal
Resolution: seconds to years
Freely programmable timer and alarm with interrupt capability
Oscillator stop detection function
Programmable offset register for frequency adjustment