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ST32F25A：ST32 Contact ARM Cortex-M3 Secure Microcontroller

The ST32F25A is a serial access microcontroller designed for secure mobile applications that incorporates the most recent generation of ARM processors for embedded systems. Its Cortex™-M3 32-bit RISC core operating at a 20-MHz frequency brings great performance and excellent code compacity to the application thanks to the Thumb®-2 instruction set.

The high-speed embedded Flash 256 Kbyte memory introduces more flexibility to the system.

The ST32F25A also offers a serial communication interface fully compatible with the ISO 7816-3 standard (T=0, T=1) for smartcard applications.

Two general purpose 16-bit timers are available.

A hardware Data Encryption Standard (DES) accelerator can be used to the user to optimize the application performance. A software library is provided for Advanced Encryption Standard (AES) implementation.

The ST32F25A operates in the –25 to +85°C temperature range and 1.8 V, 3 V and 5 V supply voltage ranges. A comprehensive range of power-saving modes enables the design of efficient low-power applications.

In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK^®packages, depending on their level of environmental compliance. ECOPACK^®specifications, grade definitions and product status are available at: www.st.com. ECOPACK^®is an ST trademark.

Key Features

• Hardware features
  • CPU clock frequency up to 20 MHz
  • External clock multiplier (2x, 3x, and 4x)
  • 256 Kbytes of user Flash memory with OTP area:
    • 10-year data retention
    • 100,000 Erase/Write cycles per page
    • Page granularity of 128 Bytes
    • Block granularity: 1 Kbyte
    • 128 Bytes of OTP for user
    • Page Erase time 3 ms
    • Block Erase 1 Kbyte in 15 ms
    • Programming performance up to 10μs/byte
    • Flash Erase / Write Protection software programmable on 64 Kbyte sectors
  • Asynchronous Receiver Transmitter supporting ISO 7816-3 T=0 and T=1 protocols
  • Two 16-bit timers with interrupt capability
  • 1.8V, 3V and 5V supply voltage ranges
  • External clock frequency from 1 up to 7.5 MHz
  • High performance provided by:
    • CPU clock frequency up to 20 MHz
    • External clock multiplier (2x, 3x, and 4x)
    • 256 Kbytes of user Flash memory with OTP area:
      • 10-year data retention
      • 100,000 Erase/Write cycles per page
      • Page granularity of 128 Bytes
      • Block granularity: 1 Kbyte
      • 128 Bytes of OTP for user
      • Page Erase time 3 ms
      • Block Erase 1 Kbyte in 15 ms
      • Programming performance up to 10μs/byte
      • Flash Erase / Write Protection software programmable on 64 Kbyte sectors
    • Asynchronous Receiver Transmitter supporting ISO 7816-3 T=0 and T=1 protocols
    • Two 16-bit timers with interrupt capability
    • 1.8V, 3V and 5V supply voltage ranges
    • External clock frequency from 1 up to 7.5 MHz
    • Programming performance up to 10μs/byte
    • Flash Erase / Write Protection software programmable on 64 Kbyte sectors
  • Current consumption compatible with GSM and ETSI specifications
  • Power-saving Standby state
  • Contact assignment compatible ISO 7816-2
  • ESD protection greater than 4 kV (HBM)
• Security features
  • Monitoring of environmental parameters
  • Protection against faults
  • ISO 3309 CRC calculation block
  • True random number generator
  • Unique serial number on each die
  • Hardware data encryption standard (DES) accelerator
• Software features
  • Flash loader
  • Flash drivers
• Development environment

Product Specifications

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Quality & Reliability