KM1x 32-bit Microcontrollers NXP Semiconductors KM1x 32-bit Microcontrollers are mainstream precision metrology MCUs based on Arm® Cortex®-M0+ core. These MCUs provide a low-cost and highly-integrated solution for single-chip one-, two-, and three-phase electricity meters that require powerful 32-bit processing capability, precision-analog, security, and HMI-functionality. The KM1x MCUs provide security, memory protection, tamper detection, powerful Analog Front-End (AFE), and protection of user data. These MCUs support high-precision internal voltage reference with low-temperature drift and also feature a comprehensive enablement suite including reference designs. Typical applications include energy meters, motion control and robotics, industrial measurement and sensing, home security, and flow meters (like heat, water, and gas).