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DS2251T128-16 PDF预览

DS2251T128-16

更新时间: 2024-11-25 06:03:55
品牌 Logo 应用领域
美信 - MAXIM 微控制器
页数 文件大小 规格书
22页 599K
描述
Microcontroller, 8-Bit, 8051 CPU, 16MHz, CMOS, SIMM-72

DS2251T128-16 数据手册

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DS2251T  
128k Soft Microcontroller Module  
www.maxim-ic.com  
FEATURES  
PIN CONFIGURATION  
8051-Compatible Microcontroller Adapts  
to Its Task  
32, 64, or 128kbytes 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 Up to  
10 Years in the Absence of VCC at Room  
Temperature  
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  
on-board 32kHz crystal.  
1 of 22  
REV: 061306  

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