DS2252T_06 Datasheet, PDF (1/16 Pages) Dallas Semiconductor – Soft Microcontroller Module

DS2252T
Soft Microcontroller Module
www.maxim-ic.com
GENERAL DESCRIPTION
The DS2252T secure microcontroller module is
an 8051-compatible microcontroller based on
nonvolatile RAM technology. It is designed for
systems that need to protect memory contents
from disclosure. This includes key data, sensitive
algorithms, and proprietary information of all
types. Like other members of the secure
microcontroller family, it provides full
compatibility with the 8051 instruction set,
timers, serial port, and parallel I/O ports. By
using NV RAM instead of ROM, the user can
program, then reprogram the microcontroller
while in-system. This allows frequent changing of
sensitive processes with minimal effort.
PIN CONFIGURATION
DS2252T
1
20
21
40
40-Pin SIMM
Operating information and detailed summary of this product’s
security features are contained in the Secure Microcontroller
User’s Guide. This data sheet provides ordering information,
pinout, and electrical specifications.
ORDERING INFORMATION
FEATURES
8051-Compatible Microcontroller
8, 32, or 64kbytes of Nonvolatile SRAM for
Program and/or Data Memory Storage
In-System Programming via On-Chip Serial
Port
Capable of Modifying its Own Program
and/or Data Memory in the End System
Firmware Security Features
Memory Stored in Encrypted Form
Encryption Using On-Chip 64-Bit Key
Automatic True Random Key Generator
Self-Destruct Input (SDI)
Improved Security Over Previous Generations
Protects Memory Contents from Piracy
Crashproof Operation
Maintains All Nonvolatile Resources Up to
10 Years in the Absence of V_CC at Room
Temperature
Power-Fail Reset
Early Warning Power-Fail Interrupt
Watchdog Timer
Precision Reference for Power Monitor
Fully 8051 Compatible
128 Bytes Scratchpad RAM
Two Timer/Counters
On-Chip Serial Port
32 Parallel I/O Port Pins
Permanently Powered Real-Time Clock
PART
RAM SIZE (kB) MAX CRYSTAL SPEED (MHz) TIMEKEEPING?
DS2252T-64-16
64
16
Yes
DS2252T-64-16#
64
16
Yes
DS2252T-128-16
128
16
Yes
DS2252T-128-16#
128
16
Yes
# Denotes RoHS-compliant device that may contain lead exempt under the RoHS requirements.
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REV: 061306