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The MAX32625 is an ARM®Cortex®-M4 with FPU-based microcontrollers, ideal for the emerging category of wearable medical and fitness applications. The architecture combines ultra-low power, high-efficiency signal processing functionality 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 provides 512kB of flash and 160kB of SRAM.
The device features four powerful and flexible power modes. A peripheral management unit (PMU) enables intelligent peripheral control with up to six channels to significantly reduce power consumption. Built-in dynamic clock gating and firmware-controlled power gating allows the user to optimize power for the specific application.
Multiple SPI, UART, and I2C serial interfaces are provided, as well as a 1-Wire® master and USB, allowing for interconnection to a wide variety of external sensors.
A four-input, 10-bit delta-sigma ADC monitors analog input from external sensors.
The MAX32625L is a lower-cost version of the MAX32625, providing 256kB of flash and 128kB of SRAM.
The MAX32626 is a secure version of the MAX32625. 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 TRNG entropy generator, and a secure boot loader. Both the MAX32626 and the MAX32625 provide a hardware AES engine.
High-Efficiency Microcontroller for Wearable Devices
Internal Oscillator Operates Up to 96MHz
Low Power 4MHz Oscillator System Clock Option for Always-On Monitoring Applications
512KB Flash Memory (256KB "L" Version)
160KB SRAM (128KB "L" Version)
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
106μA/MHz Active Current Executing from Cache
49μA/MHz Active Current Executing from Flash
Wakeup to 96MHz Clock or 4MHz Clock
600nA Low Power Mode (LP0) Current with RTC Enabled
2.56μW Ultra-Low Power Data Retention Sleep Mode (LP1) with Fast 5μs Wakeup on 96MHz Clock Source
27μA/MHz Low Power Mode (LP2) Current
Optimal Peripheral Mix Provides Platform Scalability
SPI Execute in Place (SPIX) Engine for Memory Expansion with Minimal Footprint
Three SPI Masters, One SPI Slave
Three UARTs
Up to Two I2C Masters, One I2C Slave
1-Wire Master
Full-Speed USB 2.0 Device with Internal Transceiver
Sixteen Pulse Train (PWM) Engines
Six 32-Bit Timers and 3 Watchdog Timers
Up to 40 General-Purpose I/O Pins
10-Bit Delta-Sigma ADC Operating at 7.8ksps
AES -128, -192, -256
CMOS-Level 32kHz RTC Output Available in All Power Modes
Secure Valuable IP and Data with Robust Internal Hardware Security (MAX32626 Only)
Trust Protection Unit (TPU) Provides ECDSA and Modular Arithmetic Acceleration Support
True Random Number Generator
Secure Boot Loader
Applications/UsesFitness Monitors
Portable Medical Devices
Sensor Hubs
Sports Watches
Wearable Medical Patches
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