core processor ARM® Cortex®-M3 Kernel specification 32-bit single core speed 32MHz Connectivity I2C, IrDA, LINbus, SPI, UART/USART, USB Peripherals Brownout Detect/Reset, Capacitive Sense, DMA, I2S, POR, PWM, WDT I/O count 37 Program storage capacity 128KB (128K x 8) Program memory type flash EEPROM capacity 4K x 8 RAM size 32K x 8 Voltage - Supply (Vcc/Vdd) 1.8V ~ 3.6V data converter A/D 16x12b; D/A 2x12b Oscillator Type internal Operating temperature -40°C ~ 85°C (TA) installation type Surface Mount Type Package/Enclosure 48-LQFP Supplier Device Packaging 48-LQFP (7x7) Basic product number STM32L151