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DS2250T PDF预览

DS2250T

更新时间: 2024-11-26 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 596K
描述
Soft Microcontroller Module

DS2250T 数据手册

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DS2250(T)  
Soft Microcontroller Module  
www.dalsemi.com  
FEATURES  
8-bit 8051-compatible microcontroller adapts  
to task-at-hand:  
PIN ASSIGNMENT  
-
-
-
8, 32, or 64 kbytes of nonvolatile RAM  
for program and/or data memory storage  
Initial downloading of software in end  
system via on-chip serial port  
Capable of modifying its own program  
and/or data memory in end use  
1
20  
21  
40  
40-Pin SIMM  
High-reliability operation:  
-
Maintains all nonvolatile resources for 10  
years in the absence of VCC  
Power-fail reset  
Early warning power-fail interrupt  
Watchdog timer  
-
-
-
Software Security Feature:  
-
Executes encrypted software to prevent  
unauthorized disclosure  
On-chip, full-duplex serial I/O ports  
Two on-chip timer/event counters  
32 parallel I/O lines  
Compatible with industry standard 8051  
instruction set  
Permanently powered real time clock  
DESCRIPTION  
The DS2250(T) Soft Microcontroller Module is a fully 8051-compatible 8-bit CMOS microcontroller that  
offers “softness” in all aspects of its application. This is accomplished through the comprehensive use of  
nonvolatile technology to preserve all information in the absence of system VCC. The internal  
program/data memory space is implemented using 8, 32, or 64 kbytes of nonvolatile CMOS SRAM.  
Furthermore, internal data registers and key configuration registers are also nonvolatile. An optional real  
time clock gives permanently powered timekeeping. The clock keeps time to a hundredth of a second  
using an on-board crystal. All nonvolatile memory and resources are maintained for over 10 years at  
room temperature in the absence of power.  
1 of 20  
112099  

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