MAXQ1741 Datasheet, PDF (1/3 Pages) Maxim Integrated Products – DeepCover Secure Microcontroller for Magnetic Card Reading

ABRIDGED DATA SHEET
MAXQ1741
DeepCover Secure Microcontroller for
Magnetic Card Reading
General Description
Features
DeepCover™ embedded security solutions cloak sensi-
tive 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/asynchro-
nous receiver-transmitter (USART) interface. Security
features include an AES encryption engine, a true hard-
ware random-number generator, voltage-attack sensors,
and a self-destruct input pin. A single-cycle 16-bit RISC
MAXQ^M 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, 1KB of fast-
wipe nonvolatile SRAM (NV SRAM), and 128 bytes of
data NV SRAM that instantaneously zeroizes its contents
when a tamper is detected. The 128 bytes can be used
as data RAM or working RAM for the AES. The fast-wipe
feature ensures that any data in the 1KB 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 oper-
ating 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 soft-
ware 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 stimulat-
ed by general-purpose port pins or the serial interfaces.
Applications
ATM/POS Terminals
Physical Security/Building Access
S 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
S Security
 AES Hardware Accelerators
 Hardware True Random-Number Generator
 Self-Destruct Input for Tamper Detection
 Permanent Loader Lockout Option
 Code Scrambling
S 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
S 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
S 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
S Additional Peripherals
 On-Chip Power-On/Power-Fail Reset
 Supply Overvoltage Detection
 Programmable Watchdog Timer
 Wake-Up Timer
Ordering Information appears at end of data sheet.
DeepCover is a trademark and MAXQ and 1-Wire are registered trademarks of Maxim Integrated Products, Inc.
For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/MAXQ1741.related
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may
be simultaneously available through various sales channels. For information about device errata, go to: www.maximintegrated.com/errata.
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
19-6564; Rev 0; 12/12