NuMicro M0564 series microcontrollers based on the Arm Cortex-M0 core, operating up to 72 MHz with 256 KB Flash and 20 KB SRAM. The M0564 series is pin to pin compatible with the M051 series and brings more competitive features to customers such as Voltage Adjustable Interface (VAI) for configurable serial interface connection, up to 144 MHz operating PWM for precision control, 20 channels of 12-bit ADC, and up to three sets of Universal Serial Control Interfaces (USCI) supporting flexible serial interfaces, targeted for industrial control, smart metering, and motor control.