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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 6/20頁(yè) |
| 文件大小： | 156K |
| 代理商： | DS2251T |
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DS2251T
021998 6/20
PIN
DESCRIPTION
69
INTA –
INTA from the real time clock. This output may be connected to a micro interrupt
input.
70
SQW –
SQW output from the DS1283 Real Time Clock. Can be programmed to output an
1024 Hz square wave.
INSTRUCTION SET
The DS2251T executes an instruction set that is object
code compatible with the industry standard 8051 micro-
controller. As a result, software development packages
such as assemblers and compilers that have been writ-
ten for the 8051 are compatible with the DS2251T.
A complete description of the instruction set and opera-
tion are provided in the User’s Guide section of the
Secure Microcontroller Data Book.
MEMORY ORGANIZATION
Figure 2 illustrates the memory map accessed by the
DS2251T. The entire 64K of program and 64K of data
are available to the Byte–wide bus. This preserves the
I/O ports for application use. The user controls the por-
tion of memory that is actually mapped to the Byte–wide
bus by selecting the Program Range and Data Range.
Any area not mapped into the NV RAM is reached via
the Expanded bus on Ports 0 and 2. An alternate config-
uration allows dynamic Partitioning of a 64K space as
shown in Figure 3. Selecting PES=1 provides access to
the real time clock on the DS2251T and enables PE3
and PE4 for peripheral access as shown in Figure 4.
These selections are made using Special Function
Registers. The memory map and its controls are cov-
ered in detail in the User’s Guide section of the Secure
Microcontroller Data Book.
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(jì)數(shù)器的1K位1線串行RAM) |
| DS2423 | 4K-Bit 1-Wire RAM with Counters(帶計(jì)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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