MKM14Z64ACHH5

MKM14Z64ACHH5 is a KM1x-family mainstream precision metrology MCU based on Arm® Cortex®-M0+. It enables single-chip one-, two-, and three-phase electricity meters, EV chargers, as well as flow meters, and other precision measurement applications. It is based on the 32bit Arm® Cortex®-M0+ core and provides a powerful analogue front end that is configurable for different regions, enabling power calculations with 0.1 percent accuracy. A high-accuracy auto-compensated iRTC with hardware tamper detection delivers less than 5 PPM drift over temperature. In addition to security, communication interfaces, and multiple low-power features, KM3x supports segment LCD for applications requiring HMI functionality. Metrology firmware for calculating active, reactive and apparent power using a variety of algorithms is provided free of charge.

• Includes a powerful analogue front end
• Provides security, including memory protection, tamper detection, protection of supplier/user data
• Supports high-precision internal voltage reference with low temperature drift
• Features a comprehensive enablement suite including reference designs
• 50MHz CPU frequency, 64KB flash, 16KB SRAM
• 2 (2/-) UART (ISO 7816/LPUART), 1 I²C, 2 SPI, 4 ADC (24-bit (∑Δ))
• Temperature range from -40 to 85°C
• 44 LGA package
• Operating voltage range from 2.7 to 3.6V (with AFE)
• Flexible low-power modes to provide power optimization based on application requirements