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Note for Computer Organization - CO by shivom rajput

  • Computer Organization - CO
  • Note
  • GLA University - GLA
  • Computer Science Engineering
  • B.Tech
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Text from page-1

12-1 Memory Organization Memory Hierarchy ◆ Memory hierarchy in a computer system : Main Memory : memory unit that communicates directly with the CPU (RAM) Auxiliary Memory : device that provide backup storage (Disk Drives) Cache Memory : special very-high-speed memory to increase the processing speed (Cache RAM) Auxiliary memory Magnetic tapes I/O processor Main memory Magnetic disks CPU Computer System Architecture Chap. 12 Memory Organization Cache memory Dept. of Info. Of Computer.

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Memory Organization 12-2 ◆ Multiprogramming enable the CPU to process a number of independent program concurrently ◆ Memory Management System : supervise the flow of information between auxiliary memory and main memory Memory Hierarchy is to obtain the highest possible access speed while minimizing the total cost of the memory system Register Cache Main Memory Magnetic Disk Magnetic Tape Computer System Architecture Chap. 12 Memory Organization Dept. of Info. Of Computer.

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Random Access Memory (RAM) 12-3 ◆ RAM Chips ◆ • • • Static RAM Consists of Flip-flops to store binary information. Static RAM is easier to use and having short Read/Write cycles Used mostly in Cache memory. ◆ Dynamic RAM ▪ Stores binary information in the form of electric charge stored inside the ▪ ▪ • • capacitor. The capacitors are provided by MOS transistors. Refreshing circuit is required to refresh the memory. Dynamic RAM offers reduced power consumption and large storage capacity. It is used to construct main memory. Computer System Architecture Chap. 12 Memory Organization Dept. of Info. Of Computer.

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Static RAM Vs Dynamic RAM Computer System Architecture Chap. 12 Memory Organization 12-4 Dept. of Info. Of Computer.

Lecture Notes