Unit 1.1 Systems Architecture

1. What is the purpose of the CPU?
To fetch, decode and execute instructions OR to process data.
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2. What is the function of the CPU?
To fetch, decode and execute instructions
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3. What is meant by a register?
A component for holding short term memory, used to store addresses or data currently being worked on.
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4. What is the name and purpose of one register in the CPU?
Memory Address Register, used to store the address of the next instruction / data to be accessed OR Memory Data Register, used to store the data to be brought from / sent to main memory Program Counter, used to store the address of the next ...
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Out of Cache RAM ALU Control Unit ROM state whether each component is part of the CPU.
Part of the CPU:Cache,ALU,Control Unit.Not apart of the CPU:RAM,ROM
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7. What are the effects of using a processor with a faster clock speed?
More instructions carried out per second and so instructions are executed more quickly, which allows for more programs to be run at the same time. This then allows for more complex processing (e.g. 3D graphics) to be completed in real time.
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9. What are the effects of using a processor with more cores?
More instructions carried out simultaneously, the processor can process more instructions at the same time, which allows batches of instructions to be executed more quickly, which allows for more programs to be run at the same time.
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11. What are the effects of using a processor with a bigger cache?
More space for frequently used instructions / data, more storage for very fast access, meaning faster fetching of instructions – so faster processing, meaning faster fetching of data – so faster processing.
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12. What is meant by an embedded system?
A computer system that is built into another device
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13. What is the purpose of embedded systems?
To provide specific, pre-defined function which is cheaper than providing a personal computer system. It doesn’t include unnecessary features, can be made much smaller than a personal computer system, allows for a device to be automated / programm..
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14. Provide three examples of embedded systems
• Dishwasher 
 • MP3 player 
 • Washing machine 
 • Mobile phone 
 • Manufacturing equipment 
 • Sat Nav
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15. What are the purposes of the ALU
Arithmetic & logic unit, used to perform arithmetic calculations (e.g. add, subtract, multiply), used to perform logical operations (e.g. <, >, =, !=).
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16.What are the purposes of the Control Unit
Control the flow of data within the CPU (i.e. between registers), control input and output of data to/from the CPU, controls the timing of signals sent within the CPU.
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17.What are the purposes of the Cache
Stores frequently used instructions and data, built onto the CPU, provides faster access than RAM, allows instructions and data to be loaded into the CPU more quickly.
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Other cards in this set

Card 2

Front

2. What is the function of the CPU?

Back

To fetch, decode and execute instructions

Card 3

Front

3. What is meant by a register?

Back

Preview of the front of card 3

Card 4

Front

4. What is the name and purpose of one register in the CPU?

Back

Preview of the front of card 4

Card 5

Front

Out of Cache RAM ALU Control Unit ROM state whether each component is part of the CPU.

Back

Preview of the front of card 5
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