General Description

data under multiple layers of advanced physical security

to provide the most secure key storage possible.

The DeepCover Secure microcontroller (MAX32550) pro-

vides an interoperable, secure, and cost-effective solution

to build new generations of trusted devices such as mobile

chip and pin pads. The MAX32550 is based on a Cortex

M3 processor with 1MB of embedded flash, 256KB of

system RAM, 8KB of battery-backed AES self-encrypted

NVSRAM. It includes all the essential functions of mobile

POS terminal including a cryptographic engine, a true

random number generator, battery-backed RTC, environ-

mental and tamper detection circuitry, a magnetic stripe

reader, a smart card controller with embedded transceiver

to directly support 1.8V, 3.3V, and 5V cards, and an inte-

grated secure keypad controller. It also provides a seam-

less interface to TFT displays and includes a vast array of

peripherals, SPIs, UARTs, DMA, ADC, and DAC that add

flexibility to control and differentiate the system design.

Applications

● PCI Mobile Payment Terminals (mPOS)

● ATM Keyboards

● EMV Card Reader

Benefits and Features

● Arm® Cortex® M3 Processor Core Allows for Easy

Integration into Applications

• 108MHz Core Operating Frequency Through PLL

• 1MB Dual-Bank Flash Memory with Cache

• 256KB System SRAM

• 8KB AES Self-Encrypted NVSRAM

● Security Features Facilitate System-Level Protection

• Secure Boot Loader with Public Key Authentication

• AES, DES and SHA Hardware Accelerators

• Modulo Arithmetic Hardware Accelerator (MAA)

Supporting RSA, DSA, and ECDSA

• 8-Line Secure Keypad Controller

• Hardware True Random-Number Generator

• Die Shield with Dynamic Fault Detection

• 6 External Tamper Sensors with Independent

Random Dynamic Patterns

• 256-Bit Flip-Flop-Based Battery-Backup AES Key

Storage

• Temperature and Voltage Tamper Monitor

• Real-Time Clock

● Integrated Peripherals Reduce External Component Count

• Triple-Track Magnetic Stripe Head Interface

• One ISO 7816 Smart Card Interface with Integrated

Transceiver (1.8V, 3V, and 5V)

• USB 2.0 Device with Internal Transceiver and

Dedicated PLL

• 6 Timers, 4 with PWM Capability

• Up to 70 General-Purpose I/O Pins

• 2-Channel, 10-Bit ADC and 1-Channel, 8-Bit DAC

• Color/Monochrome LCD TFT Controller

• 4-Channel DMA Controller

● Power Management Optimizes Battery Life and

Reduces Active Power Consumption

• Single 3.3V Supply Operation*

• Integrated Battery-Backup Switch

• Clock Gating Function

• Low-Current Battery-Backup Operation

*5V smart card support requires external 5.0V supply.

DeepCover is a registered trademark of Maxim Integrated Products, Inc.

Arm and Cortex are registered trademarks of Arm Limited (or its subsidiaries)

in the US and/or elsewhere.

19-7145; Rev 7; 12/17

AHB

ROM

64kB

SRAM

256kB

NVSRAM

8kB*

TRNG

USB DEVICE

FLASH

1MB

APB

OSC/PLL (2)

GPIO

TIMERS (6)

UART (2)

SPI (3)

OTP

RTC*

CRYPTO

SMART CARD

KEYPAD

ADC

DMA

SECURITY

MONITOR*

WATCHDOG

APB BRIDGE

APB PERIPHERALS

AHB PERIPHERALS

ARM

CORTEX M3

MPU

NVIC

I

D

MAX32550

S

MONO LCD

DAC

MSR

CODE SPACE

AHB

TFT

* BATTERY-BACKED BLOCKS

I

I

I

I

MAX32550

DeepCover Secure Cortex-M3

Flash Microcontroller

Functional Diagram

EVALUATION KIT AVAILABLE

ABRIDGED DATA SHEET