MAXQ1050_1111 Datasheet, PDF (1/3 Pages) Maxim Integrated Products – Secure USB Microcontroller with Asymmetric Cryptography

ABRIDGED DATA SHEET
19-5822; Rev 2; 11/11
EVALUATION KIT AVAILABLE
MAXQ1050
Secure USB Microcontroller
with Asymmetric Cryptography
General Description
The MAXQ1050 is a low-power secure microcontroller
designed for USB secure token and smart card reader
applications that require certificate-based or other public
key cryptographic schemes. The device also incorporates
a sophisticated security mechanism to protect secret key
data; two self-destruct inputs and environmental monitors
(temperature and voltage sensors) erase secret key data
when an attack condition is detected. The device has
an integrated full-speed USB device interface (including
transceiver), hardware SPI controller, and an ISO 7816
UART (universal asynchronous receiver-transmitter) for
smart card communication. The device supports high-
speed encryption with hardware accelerators for AES,
RSA, DSA, ECDSA, SHA-1, SHA-224, SHA-256, DES,
and 3DES. A true hardware random-number generator
is included for key generation and challenge generation.
The device uses the 32-bit, pipelined, highly efficient
MAXQ30 microcontroller core. It integrates 128KB flash
memory, 12KB of volatile SRAM, 4KB of battery-backed
erasable NV SRAM, and 256B of battery-backed, secure
zeroization NV SRAM. An additional 1.5KB of volatile cryp-
tographic memory can also be used as general-purpose
data memory. The 256B of battery-backed NV SRAM can
be used for key storage and other critical data. The 256B
memory can be erased in less than 1Fs using a single
pulse (“rapid zeroization”), even in battery-backed mode.
The device is powered either from the USB bus or by a
separate 3.3V voltage supply. A battery connection is
provided for applications that want to maintain secret key
data for years without draining the battery from application
use. In battery-backed mode, the NV SRAM and security
sensors consume less than 240nA (typ). Battery backup is
optional; applications can choose to store critical data in
the flash memory when the cost of the battery outweighs
the benefits of constant monitoring for tamper conditions.
Applications
Security and Banking
Tokens
Certificate Management
Electronic Signature
Generation
Smart Grid Security
Prepaid Utility
e-Commerce
Secure Access Control
Pay-per-Play
Ordering Information appears at end of data sheet.
Features
S High-Performance, Low-Power, 32-Bit MAXQ30
RISC Core
S Operates from USB Power or Single 3.3V Supply
S Runs from 20MHz (typ) Internal Oscillator
S Supports External 12/24MHz Crystal Oscillator for
Microcontroller and USB Operation
S On-Chip 2x/4x Clock Multiplier
S 16-Bit Instruction Word, 32-Bit Internal Data Bus
S 16 x 32-Bit Accumulators
S 16 x 32-Bit General-Purpose Working Registers
S Up to 20 General-Purpose I/O Pins
S 5V Tolerant I/O
S Virtually Unlimited Software Stack
S Optimized for C-Compiler (High-Speed/Density Code)
S Memory
 128KB Flash Memory, 512 x 32 Page Size
 Flash Memory Supports 20k Erase/Write Cycles
per Sector
 256B of Secure NV SRAM
 4KB Battery-Backed NV SRAM
 12KB SRAM
 Secure JTAG/TAP for In-System Programming
and On-Chip Debugger Access
S Security
 Unique 64-Bit Serial Number
 Tamper Detection with Rapid Key/Data Destruction
 Secret Key Destruction on Tamper Events
 Permanent Loader Lockout Option
 Proprietary Code Scrambling Technique Using
Random Keys
 Hardware Accelerators for AES, RSA, DSA,
ECDSA, DES, 3DES, SHA-1, SHA-224, SHA-256
 True Hardware Random-Number Generator
 Temperature and Voltage Sensors to Detect Attacks
 Two Self-Destruct Input Pins
S Additional Peripherals
 Power-Fail Warning
 Power-On-Reset/Brownout Reset
 Full-Speed USB Device with Six Endpoint
Buffers and Integrated Transceiver
 ISO 7816 Smart Card UART with FIFO
 16-Bit Programmable Timers/Counters with
Prescaler, Capture/Compare, and PWM
 SPI Master/Slave Hardware
 Programmable Watchdog Timer
 Up to 20 General-Purpose I/O Pins with Eight
External Interrupts
For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/MAXQ1050.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.maxim-ic.com/errata.
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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.