IP Security Microcontroller

High-Speed 8051 Microcontroller Encrypts Application Software to Prevent Copying and Reverse Engineering

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The DS5230 is a highly secure, four clocks-per-machine cycle, 100% 8051-instruction-set-compatible microprocessor in the secure microcontroller family from Maxim Integrated. It is a feature-reduced and cost-reduced version of the popular DS5250 high-speed secure microcontroller. Its proven architecture protects embedded application software and data against reverse engineering or cloning. A key feature of the device is that it encrypts its program memory with a hardware-based single- or triple-DES (data encryption standard) algorithm and provides optional data memory encryption, making it almost impossible to extract information. It also implements block cipher encoding that uses block addresses to modify the encrypted data, further strengthening security. This makes the device ideal for storage and transmission of passwords, personal identification numbers, encryption keys, and other highly confidential information.

Note: Designers must have the following documents to fully use all the features of this device. This 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.

Key Features

  • Feature-Rich, 8051-Compatible Microprocessor
    • Accesses Up to 64KB Program and 64KB Data Memory (All Nonvolatile)
    • In-System Programmable Through Serial Port
    • Three 16-Bit Timer/Counters
    • 256 Bytes of Scratchpad RAM
  • Advanced Features
    • CRC-16/32 Generator
    • 2KB Battery-Backed (Nonvolatile) Internal SRAM
    • Dedicated Single DES or 3DES Engine for Automatic Program Memory Encryption
  • High-Speed Architecture
    • Four Clocks-per-Machine Cycle
    • DC-to-25MHz Operation
    • Single-Cycle Instruction in 160ns
    • Dual Data Pointers Can Increment or Decrement Independently
    • Automatic Data Pointer (DPTR) Selection Available
    • Programmable Speed MOVX Instructions
    • 1KB On-Chip Instruction Cache
  • High-Reliability Operation
    • Power-Fail/Overvoltage Reset
    • Early Warning Power-Fail Interrupt
    • Watchdog Timer
  • Security Features
    • Executes Single/3DES-Encrypted Programs to Prevent Observation
    • One Self-Destruct Input
    • Tamper-Sensing Mesh Detects Probe Attacks
    • Programmable Attack Countermeasures
    • True Random-Number Generator (RNG)
    • Program Memory Integrity Checking
  • DS5230 Evaluation Kit Available (DS5230-KIT)
Product Reliability Reports: DS5230.pdf 
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.

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