The KL03 family features: a 48MHz ARM Cortex-M0+ core, 1.71-3.6V operation, Up to 32KB flash memory, 2KB RAM and 8KB ROM boot loader for easy flash upgrade. Bit manipulation engine for faster, more code-efficient bit-oriented math, a high-speed 12-bit analog-to-digital converter, Embedded 1.2V voltage reference for ADC, a High-speed analog comparator, Low-power UART, SPI, I²C (high speed up to 1Mb/s), with powerful timers for a broad range of applications, including motor control, operating temperature of -40°C to +105°C QFN (WLCSP is -40°C to +85°C operation), and depending on the package, there are up to 22 GPIOs.