MAXQ1741

PRODUCTION

DeepCover Secure Microcontroller for Magnetic Card Reading

Industry's Only Secure Microcontroller for Magnetic Card Reading

Data Sheet (Rev. 3) Product Selection Table
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Overview

  • Core Functionality
    • High-Performance, Low-Power, 16-Bit MAXQ20C RISC Core
    • 6MHz Internal Oscillator (±10%)
    • Up to 12MHz External Crystal Supported
    • 1.7V to 3.6V Operating Voltage
    • 1-Wire® Interface for Debugger and Flash Programming
    • Optimized for C-Compiler
  • Security
    • AES Hardware Accelerators
    • Hardware True Random-Number Generator
    • Self-Destruct Input for Tamper Detection
    • Permanent Loader Lockout Option
    • Code Scrambling
  • Memory
    • 16KB Flash Memory
      • 1024 Bytes Memory Page Sectors
      • 1000 Erase/Write Cycles per Sector
    • 1152 Bytes Fast-Wipe NV SRAM, 128 Bytes Usable by Cryptographic Engine
    • 6KB Utility ROM with User-Callable Routines
  • I/O and Peripherals
    • Triple-Track Magnetic Stripe Head Interface
    • Two SPI Communication Ports
    • USART Communication Port
    • Two 16-Bit Timers
    • I²C Communication Port
    • Up to 16 General-Purpose I/O Pins
    • Up to 8 External Interrupt Pins
  • Low Power Consumption
    • 3μA Current in Lowest Power Stop Mode
    • 3.75mA (typ) at 6MHz, 0.8mA (typ) at 1MHz
    • Divided System Clock Modes Available
  • Additional Peripherals
    • On-Chip Power-On/Power-Fail Reset
    • Supply Overvoltage Detection
    • Programmable Watchdog Timer
    • Wake-Up Timer

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 (MAXQ1741) is a low-power microcontroller that integrates a triple-track magnetic stripe reader interface, an I²C interface, two SPI interfaces, and one universal synchronous/asynchronous receiver-transmitter (USART) interface. Security features include an AES encryption engine, a true hardware random-number generator, voltage-attack sensors, and a self-destruct input pin. A single-cycle 16-bit RISC MAXQ® CPU powers the device. It provides a high level of security for the magnetic stripe reader by placing an ultra-secure microcontroller with high-speed hardware encryption inside the magnetic card reader head.
The device provides 16KB of flash memory and 1152 bytes of fast-wipe nonvolatile SRAM (NV SRAM) that clear its contents when a tamper is detected. The highest 128 bytes of the NV SRAM can be used as data RAM or working RAM for the AES. The fast-wipe feature ensures that any data in the 1152 bytes of memory is destroyed before any application software can access it. Factory programming of a unique 64-bit serial number, and/or customer secret key(s), is available upon request. The microcontroller runs within a wide 1.7V to 3.6V operating range. User-application firmware interfaces with the triple-track magnetic stripe interface. Reference software supports the reading of cards adhering to ISO 7811, ISO 7812, and ISO 7813. Source code to the reference software is available so applications can make adjustments for custom card formats.
An ultra-low-power stop mode provides the ultimate in low-power performance. In this mode, only a minimum amount of circuitry is powered to support detection of self-destruct events. When the main power supply is present and the microcontroller is in stop mode, the device has the option of exiting stop mode when stimulated by general-purpose port pins or the serial interfaces.

Applications

  • ATM/POS Terminals
  • Physical Security/Building Access
MAXQ1741
DeepCover Secure Microcontroller for Magnetic Card Reading
MAXQ1741 Block Diagram
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

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