DSE ICT B.a.2

Central Processing Unit

CPU​

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​Structure of a Central Processing Unit

Central Processing Unit:

• Control Unit

• Arithematic and Logic​ Unit

• Registers (tiny memory)

  • Program Counter, PC

  • Memory Address Register, MAR

  • Memory Data Register, MDR

  • Current Instruction Register​, CIR

  • Accumulator, ACC

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Open Ended

What is the function of a central processing unit (CPU)?

Multiple Choice

What are the three major components found in a Central Processing Unit?

• Control Unit (CU),

  Arithmatic and Logic Unit (ALU),

  Registers

• Clock Unit (CU),

  Arithmatic and Logic Unit (ALU),

  Bus

• Control Unit (CU),

  Arithmatic and Logic Unit (ALU),

  Memory

• Control Unit (CU),

  Graphic Processing Unit (GPU),

  Registers

​How CPU is measured

in terms of frequency

​millisecond = 1/1000 seconds

microsecond = 1/1000 000 seconds

nanosecond = 1/1000 000 000 seconds

picosecond​ = 1/1000 000 000 000 seconds

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​Hertz, Hz = 1 time per second

Kilohertz, kHz = 10³ times per seconds

Megahertz, MHz = 10⁶ times per seconds

Gigahertz, GHz = 10⁹ seconds​