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最新嵌入式系统|常用词汇表2

时间:2009-06-18 23:06:36来源:网络 作者:admin 点击:
M
memory map(内存映射)
A table or diagram containing the name and address range of each peripheral addressable by the processor within the memory space. Memory maps are a helpful aid in getting to know the target.
一个在内存空间中的,包含每个外设的名字和可由处理器设置的地址范围的表格或图表。内存映射有助于了解目标机情况。

memory-mapped  I/O(内存映射I/O)
An increasingly common hardware design methodology in which I/O devices are placed into the memory space rather than the I/O space. From the processor"s point of view, memory-mapped I/O devices look very much like memory devices.
一种日益流行的硬件设计方法,在这种方法中,I/O设备被放置在内存空间而不是I/O空间。从处理器的观点看,内存映射I/O设备看上去很象内存一样。
  
memory space(内存空间)
A processor"s standard address space. Contrast with I/O space.
一个处理器的标准地址空间。相对I/O空间。

 

Microcontroller(微控制器)
A microcontroller is very similar to a microprocessor. The main difference is that a microcontroller is designed specifically for use in embedded systems Microcontrollers typically include a CPU, memory (a small amount of RAM and/or ROM), and other peripherals on the same chip. Common examples are the 8051, Intel"s 80196, and Motorola"s 68HCxx series. 
微控制器很像微处理器。主要的差别在于微控制器被特殊设计用在嵌入式系统中。微控制器典型地包括CPU、内存(很小的RAM或ROM),还有其他的外设,它们在同一块芯片上。常见的例子是:8051、Intel80196、Motorola68HCxx系列。

 

Microprocessor(微处理器)
A piece of silicon containing a general-purpose CPU. The most common examples are Intel"s 80x86 and Motorola"s 680x0 families.
一片包含通用CPU的硅片。常见的例子是:Intel80x86、Motorola 680x0系列。

 

Monitor(监视器)
In the context of this book, a debug monitor. However, there is a second meaning for this word that is associated with intertask communication. In that context, a monitor is a language-level synchronization feature.
在这本书的上下文中,是指调试监视器。然而,第二个意思与任务间通讯相关联。在那个上下文中,监视器是高级同步机制的特性。

 

Multiprocessing(多处理)
The use of more than one processor in a single computer system. So-called "multiprocessor systems" usually have a common memory space through which the processors can communicate and share data. In addition, some multiprocessor systems support parallel processing.
在单个的计算机系统中有多个处理器。被叫作“多处理器系统”的一般有公用的内存空间,处理器通过它们进行通讯和共享数据。另外,一些多处理器系统支持并行处理。

 

Multitasking (多任务)
The execution of multiple software routines in pseudo-parallel. Each routine represents a separate "thread of execution" and is referred to as a task. The operating system is responsible for simulating parallelism by parceling out the processor"s time.
伪并行运行的多个软件程序。每一个程序表现得像分开的“执行的线程”并且被看作是一个任务。操作系统通过分配处理器时间来模拟并行方式。

 

Mutex(互斥)
A data structure for mutual exclusion, also known as a binary semaphore. A mutex is basically just a multitasking-aware binary flag that can be used to synchronize the activities of multiple tasks. As such, it can be used to protect critical sections of the code from interruption and shared resources from simultaneous use.
表现互斥现象的数据结构,也被当作二元信号灯。一个互斥基本上是一个多任务敏感的二元信号,它能用作同步多任务的行为,它常用作保护从中断来的临界段代码并且在共享同步使用的资源。
 
mutual exclusion(互斥现象)
A guarantee of exclusive access to a shared resource. In embedded systems, the shared resource is typically a block of memory, a global variable, or a set of registers. Mutual exclusion can be achieved with the use of a semaphore or mutex.
唯一访问共享资源的保证。在嵌入式系统中,共享的资源典型的有内存块或寄存器组。互斥现象能由使用信号灯或互斥完成。容-源-电-子-网-为你提供技术支持

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