DS5250 Maxim, DS5250 Datasheet
DS5250
Manufacturer Part Number
DS5250
Description
The DS5250 is a highly secure, four clocks-per-machine cycle, 100% 8051-instruction-set-compatible microprocessor in Maxim's secure microcontroller family
Manufacturer
Maxim
Datasheet
1.DS5250.pdf
(2 pages)
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The DS5250 is a highly secure, four clocks-per-
machine cycle, 100% 8051-instruction-set-compatible
microprocessor in Maxim’s secure microcontroller fami-
ly . 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 and
optionally its data memory with a hardware-based sin-
gle- or triple-DES (data encryption standard) algorithm,
making it almost impossible to extract information. It
also implements block cipher encoding that uses block
addresses to modify the encrypted data, further
strengthening security. This makes the device ideal for
storage and transmission of passwords, personal iden-
tification numbers, encryption keys, and other highly
confidential information.
♦ Feature-Rich, 8051-Compatible Microprocessor
Rev 4; 11/08
+ Denotes a lead-free/RoHS-compliant package.
Pin Configurations and Selector Guide appear at end of
data sheet.
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, contact the factory.
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.
DS5250F-825
DS5250F-825+
DS5250F-8N5
DS5250F-8N5+
DS5250F-125
DS5250F-125+
DS5250F-1N5
DS5250F-1N5+
Accesses Up to 4MB Program and 4MB Data
In-System Programmable Through Serial Port
Memory (All Nonvolatile)
PART
PIN Pads
Financial Terminals
Data Security Applications
________________________________________________________________ Maxim Integrated Products
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
Ordering Information
General Description
ABRIDGED DATA SHEET
High-Speed Secure Microcontroller
Applications
PIN-PACKAGE
80 MQFP
80 MQFP
80 MQFP
80 MQFP
100 MQFP
100 MQFP
100 MQFP
100 MQFP
Features
♦ Advanced Features
♦ High-Speed Architecture
♦ High-Reliability Operation
♦ Nonvolatile Functions
♦ Interrupts
♦ Security Features
♦ Evaluation Kit Available (DS5250-KIT)
In-Application Programmable Through User Software
Four 8-Bit Ports/One 6-Bit Port
Three 16-Bit Timer/Counters
256 Bytes of Scratchpad RAM
CRC-16/32 Generator
5KB Internal SRAM (Optional 1KB Stack)
Single or 3DES Engine
Partitionable Memory Segments Variable from 4KB to
Four Clocks-per-Machine Cycle
DC-to-25MHz Operation
Single-Cycle Instruction in 160ns
Dual Data Pointers Can Increment or Decrement
Automatic Data Pointer (DPTR) Selection Available
Programmable Speed MOVX Instructions
1KB On-Chip Instruction Cache
Power-Fail/Overvoltage Reset
Early-Warning Power-Fail Interrupt
Watchdog Timer
On-Chip Real-Time Clock with Alarm Interrupt
2KB Battery-Backed Internal SRAM
15 Interrupts with Seven External Sources
Executes Single/3DES-Encrypted Programs to
Two Self-Destruct Inputs
4096-Bit Modulo-Arithmetic Accelerator (MAA) for
Tamper Sensors Detect Thermal/Voltage/Probe Attacks
Programmable Attack Countermeasures
Secure-Loader Mode
True Random-Number Generator (RNG)
Unique ID Number in Every Device
Separate Program/Data Cryptograph
Program Memory Integrity Checking
Allows Self-Modification of Program/Data Memory
256KB
Independently
Prevent Observation
Public/Private Key Operations
1
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DS5250 Summary of contents
Page 1
... ABRIDGED DATA SHEET Rev 4; 11/08 High-Speed Secure Microcontroller General Description The DS5250 is a highly secure, four clocks-per- machine cycle, 100% 8051-instruction-set-compatible microprocessor in Maxim’s secure microcontroller fami was designed to be the cryptographic engine of PIN pads, financial terminals, and any other application in which data security is paramount ...
Page 2
... PROGRAM DATA MEMORY MEMORY CRYPTOGRAPH CRYPTOGRAPH CLOCKS BYTE-WIDE BUS INTERFACE TIMERS ROM LOADER INTERRUPT PC AND LOGIC DPTRs DS5250 INTERNAL ADDRESS BUS MMU I/O PORTS PE3, PE4, AND CExN 8 21 ...