Datasheet > DS2251

DS2251

更新时间： 2024-11-23 22:40:35

品牌	Logo	应用领域
达拉斯 - DALLAS		微控制器
页数	文件大小	规格书
20页	655K
描述
128k Soft Microcontroller Module

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DS2251 数据手册

DS2251(T)

128k Soft Microcontroller Module

www.dalsemi.com

FEATURES

ꢀ 8051-compatible microcontroller adapts to its

PIN ASSIGNMENT

task

32K, 64K, or 128K bytes of nonvolatile

SRAM for program and/or data storage

In-system programming via on-chip serial

port

Capable of modifying its own program or

data memory in the end system

Provides separate Byte-wide bus for

peripherals

Performs CRC-16 check of NV RAM

memory

ꢀ High-reliability operation

Maintains all nonvolatile resources for

over 10 years in the absence of power

Power-fail reset

Early Warning Power-fail Interrupt

Watchdog Timer

Lithium backed memory remembers

system state

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

72-Pin SIMM

DESCRIPTION

The DS2251T 128k Soft Microcontroller Module is an 8051-compatible microcontroller module based on

nonvolatile RAM technology. It is designed for systems that need large quantities of nonvolatile memory.

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. The application software can even change

its own operation. This allows frequent software upgrades, adaptive programs, customized systems, etc.

In addition, by using NV RAM, the DS2251T is ideal for data logging applications. The powerful real

time clock includes interrupts for time stamp and date. It keeps time to one-hundredth of seconds using its

onboard 32 kHz crystal.

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