Silicon Labs EZR32WG230F256R55G-B0, 32bit ARM Cortex M4 Microcontroller, EZR32WG, 48MHz, 256 kB Flash, 64-Pin QFN

The EZR32WG SoC combines an ARM Cortex-M4F core MCU with a sub-GHz radio transceiver. It delivers high-performance, low-energy wireless solutions incorporated into a small package. The low-power operating modes, fast wake-up times and low transmit/receive power consumption of the sub-GHz radio result in a solution optimised for battery-powered applications. They are compliant with IEEE 802.15.4g Wireless Personal Area Network (WPAN) and wM-Bus smart metering standards.

ARM Cortex-M4F CPU core with up to 256KB of Flash memory and 32KB RAM
EZradio and EZRadioPro transceivers
Low transmit and receive currents
Ultra-low power standby and sleep modes
Fast wake-up time
Low Energy sensor interface (LESENSE)
Rich set of peripherals including 12-bit ADC and DAC, communication interfaces (UART, SPI, I2C), GPIO and timers
USB interface (EZR32WG330 devices only)
AES encryption with 128/256-bit keys
Applications: Energy, gas, water and smart metering, Health and fitness applications, Consumer electronics, Alarm and security systems, Building and home automation , Remote sensing/control for the Internet of Things (IoT)