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MAX32621：High-Performance, Ultra-Low Power ARM Cortex-M4F with FPU-Based Microcontroller for Rechargeable Devices

Ultra-Low Power Cortex-M4F Ideally Suited for Emerging Wearable Medical and Fitness Applications

The MAX32620/MAX32621 is a 32-bit RISC ARM® Cortex®-M4 with FPU-based microcontroller. It is ideally suited for the emerging category of medical and fitness applications. The architecture combines high-efficiency, signal-processing functionality with low cost, and ease of use. An internal 96MHz oscillator provides high-performance capability, and the internal 4MHz oscillator supports minimal power consumption for applications requiring always-on monitoring. The device features 4 powerful & flexible power modes. Built-in dynamic clock gating and firmware controlled power gating minimize power consumption for any application. Multiple SPI, UART, and I2C serial interfaces, as well as a 1-Wire® master and USB, interconnect to a wide variety of external sensors. A four-input, 10-bit ADC with selectable references is provided. The MAX32621 is a secure version of the MAX32620. It incorporates a trust protection unit (TPU) with encryption and advanced security features. These features include a modular arithmetic accelerator (MAA) for ECDSA, a hardware PRNG entropy generator, and a secure boot loader. Both the MAX32620 and the MAX32621 provide a hardware AES engine. The MAX32620L is a reduced memory version of the MAX32620, providing 1MB of flash memory and 256kB of SRAM. The enhanced features described in this data sheet apply to C and later revisions of the device. The MAX32620/MAX32621 supports a legacy mode making it compatible with first generation (revision A) of the device.

Key Features High-Efficiency Microcontroller for Wearable Devices Internal Oscillator Operates Up to 96MHz Low Power 4MHz Option for Always-On Monitoring 2MB/1MB Flash Memory 256KB SRAM 8KB Instruction Cache 1.2V Core Supply Voltage 1.8V to 3.3V I/O Optional 3.3V ±5% USB Supply Voltage Wide Operating Temperature: -30°C to +85°C Power Management Maximizes Uptime for Battery Applications 122µW/MHz Active Executing from Cache 62µW/MHz Active Executing from Flash Wake-Up to 96MHz Clock or 4MHz Clock 1.06µW Low Power Mode (LP0) Mode with RTC 2.67µW Ultra-Low Power Data Retention Sleep Mode (LP1) with Fast 5µs (typ) Wakeup on 96MHz 28µW/MHz Low Power Mode (LP2) Current Optimal Peripheral Mix Provides Platform Scalability Three SPI Masters, One SPI Slave Four UARTs Up to Three I2C Masters, One I2C Slave 1-Wire® Master Up to 49 General-Purpose I/O Pins SPI Execute in Place (SPIX) Engine for Memory Expansion with Minimal Footprint Full-Speed USB 2.0 with Internal Transceiver Sixteen Pulse Train Engines Six 32-Bit or 12 16-Bit Timers Three Watchdog Timers with Independent Sources Four-Input, 10-Bit Sigma-Delta ADC Operating at 7.8 kS/s, 5.5V and 1.8V Tolerant Inputs AES-128, -192, -256 Hardware Engine CMOS-Level 32kHz RTC Output Option JTAG 1149.1 Compatible with Serial Wire Debug Secure Valuable IP and Data with Robust Internal Hardware Security (MAX32621 Only) Trust Protection Unit (TPU) Provides ECDSA and Modular Arithmetic Acceleration Support PRNG Seed Generator Secure Boot Loader

MAX32620, MAX32621: Block Diagram Applications/Uses Fitness Monitors Portable Medical Devices Sensor Hub Sport Watches Wearable Medical Patches

DataSheet

Parametrics

Design kits & evaluation modules

• MAX32620-EVKIT

Quality and Environmental Data

• MAX32621.pdf

Ordering Information