ROM（只讀存儲器）
Read-Only Memory. A broad classification of memory devices that includes all devices in which the individual memory locations may be read, but not written.
只讀存儲器。一個包括所的的每個地址只能被讀，不能被寫的存儲器的大概分類。

ROM emulator（ROM模擬器）
A debugging tool that takes the place of-or emulates-the ROM on your target board. A ROM emulator acts very much like a debug monitor, except that it includes its own serial or network connection to the host.
一種在你的目標(biāo)板上代替或模擬ROM的調(diào)試工具。ROM模擬器動作起來象一個除錯監(jiān)視器，除了它包含自己連到主機上的串口或網(wǎng)絡(luò)外。

ROM monitor
See debug monitor.

RTOS（實時操作系統(tǒng)）
Real-Time Operating System. An operating system designed specifically for use in real-time systems.
實時操作系統(tǒng)。一種被特殊設(shè)計來用在實時系統(tǒng)中的操作系統(tǒng)。

race condition（競爭狀態(tài)）
A situation in which the outcome of a program may be affected by the exact order in which the instructions are executed. Race conditions are only an issue where interrupts and/or preemption are possible and where critical sections exist.
一種程序運行的結(jié)果可能被指令執(zhí)行的順序影響的情形。競爭狀態(tài)僅僅有一種情況下產(chǎn)生，在此處中斷或（和）優(yōu)先搶占是充許的并且有一個臨界區(qū)存在。

real-time system（實時系統(tǒng)）
Any computer system, embedded or otherwise, that has deadlines. The following question can be used to distinguish real-time systems from the rest: "Is a late answer as bad, or even worse, than a wrong answer?" In other words, what happens if the computation doesn"t finish in time? If nothing bad happens, it"s not a real-time system. If someone dies or the mission fails, it"s generally considered "hard" real-time, which is meant to imply that the system has "hard" deadlines. Everything in between is "soft" real-time.
    任何計算機系統(tǒng)，嵌入的或其他的，有一個死線。以下的問題可經(jīng)被用來區(qū)分實時系統(tǒng)與其他的系統(tǒng)：“是遲到的回答壞，還是一個錯誤的回答壞？”換句話說，如果計算機沒有在指定時間內(nèi)完成它的工作會發(fā)生什么？如果什么也沒有發(fā)生，它不是一個實時系統(tǒng)。如果一些人死或任務(wù)失敗，它被認(rèn)為是“硬”實時系統(tǒng)，意思是系統(tǒng)有一個“硬”死線。介于兩者之間的是“軟”實時系統(tǒng)。

Recursive（遞歸）
Said of software that calls itself. Recursion should generally be avoided in an embedded system, since it frequently requires a large stack.
自己調(diào)用自己的程序的說法。遞歸一般在嵌入式系統(tǒng)中是不充許的，因為它常常占有大量的堆棧空間。

Reentrant（可再入的）
Said of software that can be executed multiple times simultaneously. A reentrant function can be safely called recursively or from multiple tasks. The key to making code reentrant is to ensure mutual exclusion whenever accessing global variables or shared registers.
可同時多次運行的程序的說法�？稍偃氲暮瘮�(shù)可以被安全地遞歸調(diào)用或由多任務(wù)多次調(diào)用。使代碼可再入的關(guān)鍵在于確保在訪問全局變量或共享寄存器時互斥現(xiàn)象發(fā)生。

Register（寄存器）
A memory location that is part of a processor or an I/O device. In other words, it"s not normal memory. Generally, each bit or set of bits within the register controls some behavior of the larger device.
是處理器或I/O設(shè)備一部分的儲存器的地址。換句話說，不是標(biāo)準(zhǔn)的儲存器。一般地，在寄存器控制每一二進制位或二進制位的集控制大量設(shè)備的一些行為。

Relocatable（可重定位的）
A file containing object code that is almost ready for execution on the target. The final step is to use a locator to fix the remaining relocatable addresses within the code. The result of that process is an executable.
包含幾乎可以準(zhǔn)備好在目標(biāo)機上運行的目標(biāo)代碼的文件。最后一步是使用定位程序去整理保留在代碼中的可重定位地址。這個步驟的結(jié)果是一個可執(zhí)行的程序。本文由容源電子網(wǎng)（m.zhongyiwenxian.com.cn）整理提供，部分內(nèi)容來源于網(wǎng)絡(luò)，如有侵犯到你的權(quán)利請與我們聯(lián)系更正。