System Architecture 4.0 / 5 based on 1 rating ? ComputingComputer systemsGCSEAQA Created by: AdhvayCreated on: 12-09-18 14:45 What are embedded systems programs likely to be stored in? They are stored in ROM not Ram 1 of 18 What is in the Von Neumann Architecture? A Single memory for accessing data and programs. 2 of 18 How is information fetched In VN-Architecture Info and instructions are fetched form the memory and executed sequentially 3 of 18 What are the 4 main components in the CPU Arithmetic + Logic Unit, Control Unit, Clock and Bus 4 of 18 What functions do the ALU preform Logical Operations, Shift Operations and Arithmetic Operations 5 of 18 What are Logical Operations AND, OR plus NOT (Think Logic Gates) 6 of 18 What are Shift Operations Changing the location of a string of a code without changing it. 7 of 18 What does the Clock in the CPU do Controls processor timing + Synchronizes all CPU operations 8 of 18 What does the Bus do (the one in the CPU) The Bus The internal connections between the components of the CPU 9 of 18 “A bus is a collection of wires through which data is transmitted from one component to another.” REMEMBER THIS ADHVAY 10 of 18 Name the steps of the Fetch-Execute Cycle 1) Fetch (Ram) 2) Decode (Control Unit) 3) Execute (ALU) 11 of 18 What does Fetch do? The address of the next instruction to be executed is fetched from the reister 12 of 18 What does Control do? The control unit decodes the instruction to see what has to be done. It just translates it. 13 of 18 What does Execute do? The ALU runs the instruction(s) 14 of 18 Factors affecting CPU performance? Clock Speed, Cache Memory and Type and the Number of processor cores. 15 of 18 How does Clock Speed affect preformance Greater Clock speed = More pulses = More instructions completed each second. 16 of 18 How does Cache Memory affect performance Better Cache (LVL 1,2,3) is faster than the Main Memory so it lets the processor run faster. 17 of 18 How do Processor Cores affect performance More Cores= More instructions that can run at the same time or in a set time. 18 of 18
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