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DS5250_04 Datasheet

Download or read online Maxim Integrated DS5250_04 High-Speed Secure Microcontroller pdf datasheet.



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GENERAL DESCRIPTION
The DS5250 is a highly secure, 4 clocks-per-machine
cycle,
100%
8051-instruction-set-compatible
microprocessor in the Secure Microcontroller family
from Dallas Semiconductor. It was designed to be the
cryptographic engine of PIN pads, financial terminals,
and any other application in which data security is
paramount. A key feature of the device is that it
encrypts its program memory with a hardware-based
single or triple (3) DES (data encryption standard)
algorithm, making it nearly impossible to extract
information. Another DES (3DES) hardware block is
available to the user for encrypting arbitrary information
in data memory space. This makes the device ideal for
storage and transmission of passwords, personal
identification numbers, encryption keys, and other highly
confidential information.
APPLICATIONS
PIN Pads
Financial Terminals
Applications that Require Data Security
ORDERING INFORMATION
MAX
CLOCK
PART
TEMP RANGE
SPEED
(MHz)
DS5250F-825
0°C to +70°C
DS5250F-125
0°C to +70°C
DS5250F-8N5
-40°C to +85°C
DS5250F-1N5
-40°C to +85°C
Pin Configurations appear on page 2.
FEATURES
§
Drop-In Upgrade to the Dallas DS5240
§
Feature-Rich, 8051-Compatible, Highly Secure
Microcontroller
Accesses Up to 4MB Program and 4MB Data Memory
(All Nonvolatile)
In-System Programmable through Serial Port
In-Application Programmable through User Software;
Allows Self-Modification of Program/Data Memory
Four 8-Bit Ports/One 6-Bit Port
Three 16-Bit Timer/Counters
256 Bytes of Scratchpad RAM
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 DS5250 errata, contact the factory.
High-Speed Secure Microcontroller
§
§
§
§
§
PIN-PACKAGE
25
80 Plastic MQFP
25
100 Plastic MQFP
25
80 Plastic MQFP
25
100 Plastic MQFP
1 of 3
Advanced Features
CRC-16/32 Generator
5kB Internal SRAM (Optional 1kB Stack)
Single or 3DES Engine
Partitionable Memory Segments Variable from 4kB to
256kB
High-Speed Architecture
4 Clocks-per-Machine Cycle
DC-to-25MHz Operation
Single-Cycle Instruction in 160ns
Dual Data Pointers can Increment or Decrement
Independently
Automatic Data Pointer Selection Available
Programmable Speed MOVX Instructions
1kB On-Chip Instruction Cache
High-Reliability Operation
Power-Fail/Overvoltage Reset
Early-Warning Power-Fail Interrupt
Watchdog Timer
Nonvolatile Functions
On-Chip Real-Time Clock with Alarm Interrupt
2kB Battery-Backed Internal SRAM
Security Features
Designed to Meet the Physical Security Requirements
of FIPS-140 and Common Criteria Certifications
Program Memory Integrity Checking
Executes Single/3DES-Encrypted Programs to
Prevent Observation
Separate Program/Data Cryptograph
Two Self-Destruct Inputs
4096-Bit Modulo-Arithmetic Accelerator (MAA) for PKI
Operations
Built-In Sensors Detect Attack and Cause Security
Response
Programmable Attack Countermeasures
Secure Bootstrap Loader
True Random-Number Generator (RNG)
Unique ID Number in Every Device
DS5250
REV: 071803

Summary of Contents

Page 1

GENERAL DESCRIPTION The DS5250 is a highly secure, 4 clocks-per-machine cycle, 100% 8051-instruction-set-compatible microprocessor in the Secure Microcontroller family from Dallas Semiconductor. It was designed to be the cryptographic engine of PIN pads, financial terminals, and any other application ...

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DETAILED DESCRIPTION The DS5250 has a user-selectable, program memory integrity-checking feature that triggers a tamper response if the decrypted program memory does not match a precalculated checksum, indicating a possible attack. In addition, all encryption keys for encrypted memory are ...

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... © 2003 Maxim Integrated Products · Printed USA ...

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