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Ultra-low-power dual core Arm Cortex-M4 MCU 64 MHz, Cortex-M0+ 32 MHz with 1 Mbyte of Flash memory,
Adjustable and fixed low drop positive voltage regulator
Low power dual voltage comparator
5-pin supervisor with watchdog timer and push-button reset
1-Mbit serial I2C bus EEPROM
256-Kbit serial I2C bus EEPROM with configurable device address
Watchdog timer circuit
NRND
Programmable Bluetooth LE 5.3 Wireless SoC