【正文】 英文翻譯 Singlechip ponents To autoplete singlechip basis, it should be the most important part of what it? Calculated as an example we calculate on an abacus math problems together. Cases: 36 +163 156166 247。 34. Now to carry out operations, first of all need a plan, followed by Pen and paper. We have to calculate the issue of record, and then count the first step, 163 156, add it with the results of 36 recorded in the paper, and then calculate 166 247。 34, then it results from a minus, it has been the final oute. Now, we use singlechip to plete the process, it is clear that it should be instead of thinking first of all the ponents for puting, which is the calculator。 Secondly, there must be able to play the role of devices, which can remember the original subject, the raw data and intermediate results, but also remember to enable singlechip operation can be automatically prepared by the various orders. These devices called memory. In addition, the need to replace the role of the controller, it will be in accordance with an order prior to issuing various control signals so that the whole process can be calculated step by step manner. However, this threepart light enough, the original data and mands to be input, the results of the calculation to the output, are required by the order in which they sometimes need to wait. The first step: the first number from its storage unit (Location) in the check out to the puting device. Step two: the second number from its storage unit in the check out to the puting device。 the third step: add。 fourth step: End the sum of the results to the specified memory unit. All of these take a number, send a few, the sum of deposit, etc. are a few operations (Operation), we asked the puter to operate with the implementation of the various forms of writing down the order, which is instruction. But how can we identify them and to perform these operations? This is a single chip in the design by the designers of the instruction given to it by decision. A mand, corresponding to a basic operation。 single chip can implement all the mands, the mand is the singlechip system (Iustruction Set), different types of singlechip, and its mand system is also different. The use of singlechip, the prior should be the problem to be solved into a series of mands. These instructions must be selected to identify and implement singlechip instructions. Singlechip customers to solve their own problems by the instructions for the procedure, known as source code (Source Program). Usually divided into opcode instruction (Opcode) and operand (Operand) of two major parts. Operation of the puter code that the implementation of any operation, that is, the function of mand。 operand that participate in the operation or operand address is located (that is, the operand stored in the local code). Because the single chip is a programmable device, only recognize the binary code (0,1). Operation to singlechip, singlechip microputer system in all directions, must be the form of binary code to represent. For example, in Intel39。s MCS51 series singlechip, from a number of memory out of the accumulator to the CPU (in the puting device, the participation in puting, puting the results of the dedicated storage registers) for the mand code 74H , an immediate increase in the number of accumulator the contents of the code for the 24H, together with the number of code immediately, send the number of accumulator to the internal RAM memory for the code, such as F6H ~ F7H. These instructions are binary hexadecimal binary. MCS51 MCU 8bit word length, and sometimes, it is necessary to plete a certain operation can not be fully expressed bytes. Therefore, in the instruction in singlebyte instruction, but also a number of byte instructions. By a series of binary 0 and 1 ponents, there is no obvious characteristics, poor memory, difficult to understand and easy to make mistakes. Therefore, the direct use of it is very difficult to write procedures. Thus, people with some Mnemonic (Mue monic) usually the mand function to replace the English abbreviation opcode, such as the MC