Flash memory (kByte)128RAM (kByte)16ADC type12-bit SARNumber of ADC channels7, 11, 13Number of GPIOs20, 28, 44UART2Number of I2Cs1SPI1Features5-V-tolerant I/Os, AES encryption, DMA, Dual-bank flash, General purpose, RTCSupply voltage (min) (V)1.62Supply voltage (max) (V)3.6Operating temperature range (°C)-40 to 125RatingCatalog