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參數(shù)資料
| 型號： | DS2251T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 128K Soft Microcontroller Module(128K軟件微控制器模塊) |
| 中文描述： | 8-BIT, MICROCONTROLLER, SMA72 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 156K |
| 代理商： | DS2251T |
DS2251T
128K Soft Microcontroller Module
DS2251T
021998 1/20
FEATURES
8051 compatible microcontroller adapts to its 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
PACKAGE OUTLINE
7
1
72–PIN SIMM
DESCRIPTION
The DS2251T is an 8051 compatible microcontroller
module based on nonvolatile RAM technology. It is
designed for systems that need large quantities of non-
volatile 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 second using its on–
board 32 KHz crystal.
The DS2251T provides the benefits of NV RAM without
using I/O resources. Between 32K bytes and
128K bytes of on–board NV RAM are available. A non–
multiplexed Byte–wide address and data bus is used for
memory access. This bus, which is available at the con-
nector, can perform all memory access and also pro-
vides decoded chip enables for off–board memory
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS2252T | Secure Microcontroller Module(安全的微控制器模塊) |
| DS229 | Triple RS232 Transmitter/Receiver(三路RS232發(fā)送器/接收器) |
| DS232A | Dual RS232 Transmitter/Receiver(雙路RS232發(fā)送器/接收器) |
| DS2422 | 1K-Bit 1-Wire RAM with Counters(帶計數(shù)器的1K位1線串行RAM) |
| DS2423 | 4K-Bit 1-Wire RAM with Counters(帶計數(shù)器的4K位1線串行RAM) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2251T_06 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:128k Soft Microcontroller Module |
| DS2251T08-08 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| DS2251T08-12 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| DS2251T08-16 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| DS2251T128-08 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
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