Low-Power, ARM Cortex-M4 with FPU-Based SOC with Contactless Transceiver

Secure Cortex-M4F Microcontroller with Integrated Contactless Interface and XiP Quad SPI

Please check latest availability status for a specific part variant.


DeepCover® embedded security solutions cloak sensitive data under multiple layers of advanced physical security to provide the most secure software protection possible.

The DeepCover secure microcontroller (MAX32566) is a secure and cost-effective solution for new generations of trusted devices for mobile payment. An RF contactless radio allows for fast, reliable communication.

The ARM® Cortex®-M4 with FPU core supports a 96MHz system clock. Multiple power operating modes and dynamic clock gating minimize power consumption while maintaining high-performance on demand. Up to 128MB of external, encryptable flash memory is supported on a high-speed SPI bus. Portions of the internal 128kB SRAM are encryptable and can be battery-backed for secure and reliable storage.

Multiple security features create a secure cryptographic boundary that protects program code and data. Environmental, microprobe, and user-configurable external dynamic tamper sensors can trigger a system-level tamper response, erasing secret keys and rendering internal and external memory unreadable. A secure keyboard controller provides a convenient user interface while protecting against unauthorized access. High-speed cryptographic accelerators and a random number generator support highly secure communications.

Multiple SPI, I2S, I2C, UART and ISO-7816 UART serial interfaces are provided, as well as a USB controller/transceiver. Four general-purpose timers support PWM output. An integrated four-channel, 9-bit 4MS/s SAR ADC measures battery voltages and other external signals.

Key Features

  • High-Efficiency Microcontroller Optimizes Battery Life
    • External 24MHz Crystal Supports 96MHz System Clock
    • High-Speed Execute-in-Place SPI (SPIX) Interfaces with Up to 128MB External Flash
    • 128kB of System SRAM
    • Scalable Battery Backup of 0/32/64/96/128kB
    • Scalable Encryption of 0/32/64/96/128kB
    • Multiple 32-Bit Words of One-Time Programmable (OTP) Memory
    • Single 3.0V/3.3V Supply Operation with Internal LDO
  • Multimode, Multistandard RF Radio
    • ISO 14443 Type A/B and EMV Compliant Contactless Interface with Internal Transceiver
  • Security Features Facilitate System-Level Protection
    • Public-Key Based Secure Boot Loader
    • Real-Time AES Decryption and Authentication for External Code Memory
    • AES, DES, 3DES, and SHA Hardware Accelerators
    • Modulo Arithmetic Hardware Accelerator (MAA) Supporting RSA, DSA, and ECC
    • 10-Line Secure Keypad Controller
    • Hardware True Random Number Generator
    • Up to Six External Dynamic Tamper Sensor Pairs with Independent Random Dynamic Patterns
    • Fast Erase of Battery-Backed AES Keys
    • Environmental and Microprobe Tamper Sensors
    • Battery-Backed Real-Time Clock
  • Optimal Peripheral Mix Provides Platform Scalability
    • Two ISO 7816 UARTs
    • Three UARTs
    • Two SPI/I2S Ports
    • One I2C Controller
    • USB 2.0 Full-Speed Device with Internal Transceiver
    • Four 32-Bit Timers with PWM Capability
    • Watchdog Timer and One Wakeup Timer
    • Four-Input, 9-Bit SAR ADC Operating at 4MS/s
    • Up to 59 General-Purpose I/O Pins


  • Contactless Payment
  • Electronic Commerce
  • Fitness wearables
  • IoT
  • PCI Terminals
  • PIN Pads
  • Secure Access Control
  • Secure Payment

See parametric specs for Microcontrollers (55)

Part NumberMCU CoreCore Clock Speed
Data ProcessingInternal Flash
Internal SRAM
USARTsSPI BusI2C BusUSBGPIO PinsPWMTimer FeaturesPackage/Pins
MAX32566 ARM Cortex-M4F9632-bit0128321 Master
1 x 2.0 FS Device
Device Including Transceiver

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX32566-KIT: Evaluation Kit for the MAX32566
Request Reliability Report for: MAX32566 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >


Related Resources

High Reliability, Ultra-Low Power Microcontroller Powered by Arm Cortex M4 Processor with FPU for Industrial and IoT

  • High-Efficiency Microcontroller for Low Power, High Reliability Devices
  • Flexible Clocking Schemes
  • Power Management Maximizes Uptime for Battery Applications