题目内容

For the problems in this exercise, assume that there are no pipeline stalls and that the breakdown of executed instructions is as follows:add addi not beq lwsw20% 20% 0% 25% 25% 10%1. In what fraction of all cycles is the data memory used?2. In what fraction of all cycles is the input of the sign-extend circuit needed? What is this circuit doing in cycles in which its input is not needed?

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In this exercise we examine in detail how an instruction is executed in a single-cycle datapath. Problems in this exercise refer to a clock cycle in which the processor fetches the following instruction word:10101100011000100000000000010100.Assume that data memory is all zeros and that the processor’s registers have the following values at the beginning of the cycle in which the above instruction word is fetched:1.What are the outputs of the sign-extend and the jump “Shift left 2” unit (near the top of Figure 4.24 in the text book) for this instruction word?2. What are the values of the ALU control unit’s inputs for this instruction?3. What is the new PC address aft er this instruction is executed? Highlight the path through which this value is determined.4. For each Mux, show the values of its data output during the execution of this instruction and these register values.5. For the ALU and the two add units, what are their data input values?6. What are the values of all inputs for the “Registers” unit?

频敏变阻器用于_________电动机的起动场合。（鼠笼式、绕线式）

异步电动机的转差率为4%，则传递到转子的电磁功率 Pem 有百分之为转子铜耗，有百分之_转变为机械功率。

异步电动机的制动方法有：___制动、_制动、_____制动。