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ChipDNA Secure Arm Cortex M4 Microcontroller

ChipDNA Secure Microcontroller with Secure Boot for IoT Applications

Product Details

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

The DeepCover secure microcontroller MAX32520 provides an interoperable, secure, and cost-effective solution to build new generations of trusted embedded systems and communication devices such as IoT, IoT gateways, and wireless access points.

The MAX32520 incorporates Maxim's patented ChipDNA™ PUF technology. ChipDNA technology involves a physically unclonable function (PUF) that enables cost-effective protection against invasive physical attacks. Using the random variation of semiconductor device characteristics that naturally occur during wafer fabrication, the ChipDNA circuit generates a unique output value that is repeatable over time, temperature, and operating voltage. Attempts to probe or observe ChipDNA operation modifies the underlying circuit characteristics, preventing discovery of the unique value used by the chip cryptographic functions. The MAX32520 utilizes the ChipDNA output as key content to cryptographically secure all device stored data including user firmware. User firmware encryption provides ultimate software IP protection. The ChipDNA can also generate a private key for the ECDSA signing operation.

The MAX32520 integrates an Arm® Cortex® -M4 processor, 2MB of Flash, 136KB of system RAM + 34KB ECC, 8KB of one-time-programmable (OTP) memory and 128KB of boot ROM.

The MAX32520 provides a FIPS/NIST compliant TRNG, environmental and tamper detection circuitry to facilitate system-level security.

Multiple high-speed interfaces are supported including SPI, UART, and an I²C. The four on-chip timers also support PWM output generation for direct control of external devices. One of the SPI ports has a serial flash emulation mode allowing direct code fetching enabling secure boot for a host microcontroller.

Key Features

    High-Efficiency Microcontroller for Secure Element IoT
    • Arm Cortex-M4F with FPU Up to 120MHz
    • 16KB Unified Code Cache
    • 2MB PUF Encrypted Flash Memory with Cache Provides Ultimate Firmware IP Protection
    • Low Latency On-the-Fly Decryption of Flash Execution
    • 136KB SRAM + 34KB ECC
    • 8KB User-Programmable OTP
  • Secure Element
    • PUF-Based Keys
      • For Internal Flash Encryption
      • For Strong Device Authentication
    • Secure Boot Loader with Public Key Authentication and Serial Flash Emulation
    • AES, SHA, and ECDSA Accelerators
    • Hardware True Random Number Generator
      • SP800-90B Compliant Entropy Source
      • SP800-90A Compliant DRBG
    • Die Shield
    • Temperature and Voltage Tamper Monitor
    • External Tamper Sensor with Random Dynamic Pattern
  • Power Management Maximizes Operating Time for Battery Applications
    • Single 3.3V/2.5V/1.8V Supply
    • Down to 3.2μA Backup Mode
    • 15μs Wake-Up Time from Standby Mode
    • Clock Gating, Power Gating, Registers, and Memory Retention Modes
  • Multiple Peripherals for System Control
    • One UART
    • One I²C Interface
    • QSPI
    • Four Timers with PWM Capability
    • Up to 27 General-Purpose I/O Pins with Selectable Output Driver Strength
    • 4-Channel DMA Controller
    • 4-Pin JTAG

Applications/Uses

  • Embedded Communication Equipment (Routers, Gateways, etc.)
  • Embedded Connected Systems
  • IoT Nodes and Gateways
  • Secure Industrial Appliances, Sensors, and Controllers
  • Set-Top Boxes
Parametric specs for Microcontrollers
MCU Core ARM Cortex-M4F
Internal Flash (KBytes) 2048
Core Clock Speed (MHz) (max) 120
Data Processing 32-bit
Internal SRAM (KBytes) 170
Package/Pins TQFN-CU/32
Budgetary
Price (See Notes)
$3.44 @1k
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Simplified Block Diagram

MAX32520: Typical Application Circuits MAX32520: Typical Application Circuits Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX32520 evaluation kit (EV kit) provides a platform for evaluation capabilities of the MAX32520 for secure element IoT utilizing Maxim’s proprietary PUF (physically unclonable function) technology.

The MAX32520 integrates an Arm® Cortex® M4 processor with FPU, 2MB of flash, 136KB of system RAM and 34KB ECC, 8KB of one-time-programmable (OTP) memory and 128KB of boot ROM. It provides a FIPS/ compliant TRNG, as well as environmental and tamper detection circuitry to facilitate system-level security. Multiple high speed interfaces are supported including SPI, UART, and an I2C. One of the SPI ports has a serial flash emulation mode allowing direct code fetching enabling secure boot from a host microcontroller.

View Details

Features

  • Arm® Cortex® M4 Processor with FPU with ChipDNA™ PUF Technology
  • USB 2.0 Micro B to Serial UART
  • Serial UART Access Selectable Through a USB 2.0 Serial Bridge or from an Optional Host Processor
  • Security Self-Destruct Jumper
  • Arm® or SWD JTAG 20-Pin Header and Cortex 10-Pin Header
  • 40-Pin Connector for Interfacing to a Host Processor
  • 16-Pin Ribbon Cable Connector for Interfacing to QSPI
  • Three PMOD Connectors for Interfacing to SPI, I2C, or Timer Modules
  • Select GPIOs Accessed Through Shared 0.1in Headers
  • Board Power Provided by Either USB Port or from a Host Processor
  • Onboard 1.8V, 2.5V, and 3.3V Regulators for IC and Peripherals
  • Individual Power Measurement on All IC Rails Through Jumpers
  • Two General-Purpose LEDs and One General- Purpose Pushbutton Switch

Description

The MAX32520FTHR evaluation kit provides an inexpensive and convenient platform for evaluating the MAX32520 secure Arm® Cortex®-M4 processor with FPU that incorporates Maxim’s patented ChipDNA™ PUF technology and other security features. The featherwing form factor and USB connectivity enable rapid prototyping and firmware development.

View Details

Features

  • Featherwing Form Factor for General Hardware Prototyping
  • PMOD Connector for Interface with PMOD-Compatible Peripherals
  • USB Controller for High-Speed Data Transfer with a PC Host
  • SWD Port for Programming and Debugging

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Support & Training

Search our knowledge base for answers to your technical questions.

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Parameters

Parametric specs for Microcontrollers
MCU Core ARM Cortex-M4F
Internal Flash (KBytes) 2048
Core Clock Speed (MHz) (max) 120
Data Processing 32-bit
Internal SRAM (KBytes) 170
Package/Pins TQFN-CU/32
Budgetary
Price (See Notes)
$3.44 @1k

Key Features

    High-Efficiency Microcontroller for Secure Element IoT
    • Arm Cortex-M4F with FPU Up to 120MHz
    • 16KB Unified Code Cache
    • 2MB PUF Encrypted Flash Memory with Cache Provides Ultimate Firmware IP Protection
    • Low Latency On-the-Fly Decryption of Flash Execution
    • 136KB SRAM + 34KB ECC
    • 8KB User-Programmable OTP
  • Secure Element
    • PUF-Based Keys
      • For Internal Flash Encryption
      • For Strong Device Authentication
    • Secure Boot Loader with Public Key Authentication and Serial Flash Emulation
    • AES, SHA, and ECDSA Accelerators
    • Hardware True Random Number Generator
      • SP800-90B Compliant Entropy Source
      • SP800-90A Compliant DRBG
    • Die Shield
    • Temperature and Voltage Tamper Monitor
    • External Tamper Sensor with Random Dynamic Pattern
  • Power Management Maximizes Operating Time for Battery Applications
    • Single 3.3V/2.5V/1.8V Supply
    • Down to 3.2μA Backup Mode
    • 15μs Wake-Up Time from Standby Mode
    • Clock Gating, Power Gating, Registers, and Memory Retention Modes
  • Multiple Peripherals for System Control
    • One UART
    • One I²C Interface
    • QSPI
    • Four Timers with PWM Capability
    • Up to 27 General-Purpose I/O Pins with Selectable Output Driver Strength
    • 4-Channel DMA Controller
    • 4-Pin JTAG

Applications/Uses

  • Embedded Communication Equipment (Routers, Gateways, etc.)
  • Embedded Connected Systems
  • IoT Nodes and Gateways
  • Secure Industrial Appliances, Sensors, and Controllers
  • Set-Top Boxes

Description

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

The DeepCover secure microcontroller MAX32520 provides an interoperable, secure, and cost-effective solution to build new generations of trusted embedded systems and communication devices such as IoT, IoT gateways, and wireless access points.

The MAX32520 incorporates Maxim's patented ChipDNA™ PUF technology. ChipDNA technology involves a physically unclonable function (PUF) that enables cost-effective protection against invasive physical attacks. Using the random variation of semiconductor device characteristics that naturally occur during wafer fabrication, the ChipDNA circuit generates a unique output value that is repeatable over time, temperature, and operating voltage. Attempts to probe or observe ChipDNA operation modifies the underlying circuit characteristics, preventing discovery of the unique value used by the chip cryptographic functions. The MAX32520 utilizes the ChipDNA output as key content to cryptographically secure all device stored data including user firmware. User firmware encryption provides ultimate software IP protection. The ChipDNA can also generate a private key for the ECDSA signing operation.

The MAX32520 integrates an Arm® Cortex® -M4 processor, 2MB of Flash, 136KB of system RAM + 34KB ECC, 8KB of one-time-programmable (OTP) memory and 128KB of boot ROM.

The MAX32520 provides a FIPS/NIST compliant TRNG, environmental and tamper detection circuitry to facilitate system-level security.

Multiple high-speed interfaces are supported including SPI, UART, and an I²C. The four on-chip timers also support PWM output generation for direct control of external devices. One of the SPI ports has a serial flash emulation mode allowing direct code fetching enabling secure boot for a host microcontroller.

Simplified Block Diagram

MAX32520: Typical Application Circuits MAX32520: Typical Application Circuits Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal