The EFM32HG309F64G-C-QFN24 is an integrated circuit microcontroller from Silicon Labs' Happy Gecko series. It features an ARM Cortex-M0+ core processor with a clock speed of 25MHz and a 32-bit single-core size.

• Connectivity: I2C, IrDA, SmartCard, SPI, UART/USART, and USB
• Peripherals: brown-out detect/reset, DMA, I2S, POR, PWM, and WDT
• I/O ports: 15
• Program memory size: 64KB
• RAM size: 8K x 8
• Data converters: A/D 4x12b
• Oscillator type: internal
• Temperature range: -40°C ~ 85°C (TA)
• Operating voltage: 1.98V ~ 3.8V