MAXQ1740 Maxim, MAXQ1740 Datasheet

MAXQ1740

Manufacturer Part Number

MAXQ1740

Description

The MAXQ1740 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

Manufacturer

Maxim

Datasheet

1.MAXQ1740.pdf (3 pages)

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The MAXQ1740 is a low-power microcontroller that inte-

grates a triple-track magnetic stripe reader interface, an

synchronous/asynchronous receiver-transmitter (USART)

interface. Security features include an AES encryption

engine, a true hardware random-number generator, volt-

age-attack sensors, and a self-destruct input pin. A sin-

gle-cycle 16-bit RISC MAXQ

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.

Ordering Information

SPI is a trademark of Motorola, Inc.

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:

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.maxim-ic.com/errata.

Forpricing,delivery,andorderinginformation,pleasecontactMaximDirectat1-888-629-4642,

orvisitMaxim’swebsiteatwww.maxim-ic.com.

C interface, two SPIK interfaces, and one universal

ATM/POS Terminals

Physical Security/Building Access

Magnetic Card Reader Security Microcontroller

� �� Maxim Integrated Products 1

appears at end of data sheet.

General Description

ABRIDGED DATA SHEET

CPU powers the device. It

Applications

www.maxim-ic.com/MAXQ1740.related

S CoreFunctionality

S Security

S Memory

S I/OandPeripherals

S LowPowerConsumption

S AdditionalPeripherals

 High-Performance,Low-Power,16-BitMAXQ20C

RISCCore

 6MHzInternalOscillator(±10%)

 Upto12MHzExternalCrystalSupported

 1.7Vto3.6VOperatingVoltage

 1-Wire

Programming

 OptimizedforC-Compiler

 AESHardwareAccelerators

 HardwareTrueRandom-NumberGenerator

 Self-DestructInputforTamperDetection

 PermanentLoaderLockoutOption

 CodeScrambling

 16KBFlashMemory

 1152BytesFast-WipeNVSRAM,128Bytes

UsablebyCryptographicEngine

 6KBUtilityROMwithUser-CallableRoutines

 Triple-TrackMagneticStripeHeadInterface

 TwoSPICommunicationPorts

 USARTCommunicationPort

 Two16-BitTimers

 I

 Upto16General-PurposeI/OPins

 Upto8ExternalInterruptPins

 3µACurrentinLowestPowerStopMode

 3.75mA(typ)at6MHz,0.8mA(typ)at1MHz

 DividedSystemClockModesAvailable

 On-ChipPower-On/Power-FailReset

 SupplyOvervoltageDetection

 ProgrammableWatchdogTimer

 Wake-UpTimer

CCommunicationPort

512BytesMemoryPageSectors

1000Erase/WriteCyclesperSector

InterfaceforDebuggerandFlash

MAXQ1740

19-5893; Rev 0; 6/11

Features

Related parts for MAXQ1740

MAXQ1740 Summary of contents

Page 1

... ABRIDGED DATA SHEET Magnetic Card Reader Security Microcontroller General Description The MAXQ1740 is a low-power microcontroller that inte- grates a triple-track magnetic stripe reader interface interface, two SPIK interfaces, and one universal synchronous/asynchronous receiver-transmitter (USART) interface. Security features include an AES encryption engine, a true hardware random-number generator, volt- age-attack sensors, and a self-destruct input pin ...

Page 2

... OSCILLATOR REGULATOR GND +1.7V TO +3.6V MAXQ1740 Detailed Description The MAXQ1740 is a MAXQ20C-based microcontroller intended for integration into magnetic card readers. It can be interfaced directly to a 3-track magnetic card reader head, allowing security features to be added to a POS or ATM card reader right at the machine/card inter- face ...

Page 3

... This MAXQ1740 data sheet, which contains electrical/ timing specifications and pin descriptions. • The revision-specific MAXQ1740 errata sheet. • The MAXQ1740 User’s Guide, which contains detailed information on core features and operation, including programming. A variety of highly versatile, affordably-priced develop- ...

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