Cortex-M4 ultra-low-power MCUs for wearables, from Maxim

November 17, 2016 // By Graham Prophet
Maxim configured the MAX32630 and MAX32631 ARM Cortex-M4F-based microcontrollers to provide fast processing in a tiny package, while extending battery life, for designs including high-performance fitness and medical wearable device.

The MCUs’ power management maximizes run time and provides the lowest energy consumption, in active (127 µW/MHz), DMA (32 µW/MHz), and retention sleep (3.5 µW) modes. The microcontrollers offer ample onboard code (2 MB flash), data (512 kB SRAM), and cache (8 kB) memory, which facilitate running third-party applications and logging sensor data. Interfaces include SPI, SPI XIP, UART, I²C, 1-Wire, and USB ports. Peripheral functions include six 32-bit timers, clock, 66 general-purpose I/O pins, pulse train engine, and 10-bit analogue/digital converter (7.8 ksamples/sec) The MAX32631 adds a trust protection unit (TPU) that enables advanced hardware encryption and authentication features, providing customers with a complete security toolbox to protect IP, algorithms, and user data.

The MAX32630 and secure MAX32631 extend Maxim's scalable memory architecture microcontroller portfolio for wearables, which includes the MAX32620 and secure MAX32621 with 2 MB flash memory and 256 kB SRAM, and MAX32625 and secure MAX32626 with 512 kB flash memory and 160 kB SRAM. All products operate over the -20 to +85C temperature range.


They embody a fast Cortex-M4F 32-bit microcontroller core with floating-point unit, and are packaged in a 4.37 × 4.37 mm 100-ball WLP package.


An evaluation kit is available: MAX32630-EVKIT, with pricing starting at $150.00. MAX32630 pricing starts at $6.66 (1000)


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