General Description
DARWIN is a new breed of low-power microcontrollers
built to thrive in the rapidly evolving Internet of Things
(IoT). They are smart, with the biggest memories in their
class and a massively scalable memory architecture. They
run forever, thanks to wearable-grade power technology.
They are also tough enough to withstand the most advanced
cyberattacks. DARWIN microcontrollers are designed
to run any application you can imagine—in places
where you wouldn’t dream of sending other microcontrollers.
Generation UP microcontrollers are designed to handle
the increasingly complex applications demanded by today’s
advanced battery-powered devices and wireless
sensors. The MAX32650–MAX32652 are ultra-low-power
memory-scalable microcontrollers designed specifically
for high-performance, battery-powered applications. They
are based on an Arm® Cortex®-M4 with FPU CPU with
3MB flash and 1MB SRAM. Memory scalability is supported
with multiple memory-expansion interfaces, including a
HyperBus™/Xccela™ DDR interface and two SPI execute
in place (SPIx) interfaces. A secure digital interface supports
external high-speed memory cards, including SD,
SDIO, MMC, SDHC, and microSD™.
Power-management features provide five low-power
modes for clock, peripheral, and voltage control. Individual
SRAM banks of 32KB, 96KB, or 1024KB (full retention)
can be retained with reduced power consumption. A
SmartDMA performs complex background processing
while the CPU is off to dramatically reduce overall power
consumption.
The MAX32651 is a secure version with a trust protection
unit (TPU) which provides a modular arithmetic accelerator
(MAA) for fast ECDSA, an AES engine, TRNG,
SHA-256 hash, and secure bootloader. A memory decryption
integrity unit (MDIU) provides on-the-fly data decryption
(plain or executable) stored in external flash.
The MAX32652 is packaged in a high-density, 0.35mm
pitch, 140-bump WLP targeted for tiny form factor products
that require high I/O counts.

Applications
● Sports Watches, Fitness Monitors
● Wearable Medical Patches, Portable Medical Devices
● Industrial Sensors, IoT

Benefits and Features
● Ultra-Efficient Microcontroller for Battery-Powered
Applications
• 120MHz Arm Cortex-M4 Processor with FPU
• SmartDMA Provides Background Memory
Transfers with Programmable Data Processing
• 120MHz High-Speed and 50MHz Low-Power
Oscillators
• 7.3728MHz Low-Power Oscillators
• 32.768kHz and RTC Clock (Requires External
Crystal)
• 8kHz, Always-On, Ultra-Low-Power Oscillator
• 3MB Internal Flash, 1MB Internal SRAM
• 104μW/MHz Executing from Cache at 1.1V
• Five Low-Power Modes: Active, Sleep, Background,
Deep Sleep, and Backup
• 1.8V and 3.3V I/O with No Level Translators
● Scalable Cached External Memory Interfaces:
• 120MB/s HyperBus/Xccela DDR Interface
• SPIXF/SPIXR for External Flash/RAM Expansion
• 240Mbps SDHC/eMMC/SDIO/microSD Interface
● Optimal Peripheral Mix Provides Platform Scalability
• 16-Channel DMA
• Three SPI Master (60MHz)/Slave (48MHz)
• One QuadSPI Master (60MHz)/Slave (48MHz)
• Up to Three 4Mbaud UARTs with Flow Control
• Two 1MHz I2C Master/Slave
• I2S Slave
• Four-Channel, 7.8ksps, 10-Bit Delta-Sigma ADC
• USB 2.0 Hi-Speed Device Interface with PHY
• 16 Pulse Train Generators
• Six 32-Bit Timers with 8mA High Drive
• 1-Wire® Master
● Trust Protection Unit (TPU) for IP/Data Security
• Modular Arithmetic Accelerator (MAA), True
Random Number Generator (TRNG)
• Secure Nonvolatile Key Storage, SHA-256,
AES-128/192/256
• Memory Decryption Integrity Unit, Secure Boot
ROM