50 MHz Cortex-M0+ with metrology-grade analog on board
The NXP MKM33Z64CLL5R-FR is a 32-bit ARM Cortex-M0+ MCU from the Kinetis KM series, clocked at 50 MHz. It carries 64 KB of Flash program memory and 16 KB of RAM, enough for a single-loop control algorithm or a metering stack with a local display. The part integrates a 16-bit SAR ADC, a 24-bit sigma-delta ADC, and a 6-bit DAC — a mixed-signal front end that typically needs an external converter on competing MCUs. An on-chip LCD controller drives segment displays directly, saving a glass-driver IC and the associated board area.
Industrial temperature range and supply flexibility
Rated for -40°C to 85°C ambient, the MKM33Z64CLL5R-FR suits factory-floor controllers, outdoor telecom nodes, and panel meters. The supply range spans 1.71 V to 3.6 V on Vdd.
Connectivity and peripheral set
Serial interfaces include I²C, SPI, and UART/USART — the standard set for sensor aggregation and Modbus RTU links. DMA offloads data movement from the CPU core, useful when the sigma-delta ADC runs continuous conversions. The watchdog timer (WDT) provides a supervised reset path for unattended equipment.
Sourcing and lifecycle
NXP lists the MKM33Z64CLL5R-FR as Active on the product lifecycle.