DeepCover Secure Microcontroller with 1-Wire and SPI

Secure Your Application with Advanced Physical Security and at Low Power

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

The low-power DeepCover Secure Microcontroller (MAXQ1004) integrates a 10-bit ADC, 1-Wire® slave interface, SPI, AES encryption, random-number generator (RNG), and temperature sensor with a 16-bit MAXQ® pipelined CPU. Performance bandwidth is sufficient to handle master or slave challenge-response authentication in portable devices.

The device incorporates 16KB of flash memory and 640B of RAM. Factory programming of a customer secret key is available upon request. The microcontroller runs within a wide 1.7V to 3.6V operating range.

For the ultimate in low-power performance, an ultra-low-power stop mode (300nA typ) is available. In this mode, only a minimum amount of circuitry is powered to support detection of the start of a 1-Wire transaction. When 1-Wire activity is detected, the microcontroller is turned on and the command is executed in an atomic fashion. This allows for stateless operation between commands, providing the highest reliability and lowest power consumption.

Designers must have the following documents to fully use all the features of this device. The data sheet contains pin descriptions, feature overviews, and electrical specifications. Errata sheets contain deviations from published specifications. The user's guides offer detailed information about device features and operation.
  • MAXQ1004 IC data sheet
  • MAXQ1004 revision-specific errata sheet (Click here for availability)
  • MAXQ1004 User's Guide (contact BU for availability)
MAXQ1004: Typical Application Circuit MAXQ1004: Typical Application Circuit Enlarge+

Key Features

  • High-Performance, Low-Power, 16-Bit MAXQ20 RISC Core
  • 6MHz Operation from an Internal Oscillator, Approaching 1MIPS per MHz
  • 1.7V to 3.6V Wide Operating Voltage
  • Three Independent Data Pointers Accelerate Data Movement with Automatic Increment/Decrement
  • Up to Eight General-Purpose I/O Pins
  • 16-Level Hardware Stack
  • Optimized for C-Compiler (High-Speed/Density Code)
  • Memory
    • 16KB Flash Memory, In-Application Programmable
    • 640B of Data RAM
    • 4KB of ROM
    • JTAG/TAP Bootloader Mode for In-System Programming
  • Peripheral Features
    • 10-Bit Delta-Sigma ADC, Internal Reference
    • 1-Wire Slave Interface
    • On-Chip Power-On Reset (POR)/Power-Fail Reset
    • Overvoltage Detection
    • Programmable Watchdog Timer
    • Built-In Temperature Sensor, ±6°C
  • Secure Programming Interface
    • Flash Programming Through Secure ROM Loader
    • Secret Key Destruction on Mass Erase
    • Permanent Loader Lockout Option
    • Code and Secret Scrambling
  • Unique 64-Bit Serial Number
  • Low-Power Consumption
    • 300nA (typ) in Stop Mode
    • 3.75mA (typ) at 6MHz, 0.8mA (typ) at 1MHz
    • Low-Power Divide-by Modes (2, 4, 8, 256)
    • 1-Wire/Interrupt Activity Detector


  • Battery Chargers
  • Battery Packs
  • Portable Electronics

Technical Documents

User Guide 4815 MAXQ1004 User's Guide

Quality and Environmental Data

Product Reliability Reports: MAXQ1004.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

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 >


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Type ID PDF Title
User Guide 4815 MAXQ1004 User's Guide