Types of memory
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Types of memory

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which explains about memory and its types

which explains about memory and its types

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    Types of memory Types of memory Presentation Transcript

    • Types of Memories used in computer http://improvec.blogspot.in/ 1
    • Objective On completion of this period, you would be able to learn: Functions of Memory. Types of Memory. http://improvec.blogspot.in/ 2
    • Recap Blocks in CPU Control Unit & Arithmetic and Logical Unit. Functions of CPU Performs calculations, takes decisions, and controls all the units. http://improvec.blogspot.in/ 3
    • Memory A space to keep computer’s data. It stores program, data, results or any kind of intermediate results. http://improvec.blogspot.in/ 4
    • Memory (contd...) Memory stores binary data i.e. 0’s and 1’s. http://improvec.blogspot.in/ 5
    • Types of Memory Primary memory (Semiconductor memory). Secondary memory (magnetic memory). Optical memory. http://improvec.blogspot.in/ 6
    • Primary memory: The semiconductor memory is employed as the main memory (or primary memory). It stores programs and data which are currently needed by the CPU. RAM and ROM ICs are used as the main memory of the computer http://improvec.blogspot.in/ 7
    • Primary Memory (contd...) The storage type is temporary It is volatile memory Storage capacity is limited http://improvec.blogspot.in/ 8
    • Primary memory (contd): It is part of CPU. Used for storing a little volume of data at the time of processing. http://improvec.blogspot.in/ 9
    • Secondary memoryThe magnetic memory is called as the secondarymemory (auxiliary memory).The information which is needed by the CPU forcurrent processing is transferred from thesecondary memory to the main memory. http://improvec.blogspot.in/ 10
    • Secondary memory (contd) This is non-volatile memory, i.e., data is stored permanently. The secondary memory is used for bulk storage (mass storage) of programs, data and other information. http://improvec.blogspot.in/ 11
    • Secondary memory (contd) Storage capacity is enlarged. Used for preserving high volume of data for future use The magnetic memories such as hard disk and floppy disk are the most commonly used. http://improvec.blogspot.in/ 12
    • Types of memory MEMORY MEMORY PRIMARY MEMORY PRIMARY MEMORY SECONDARY MEMORY SECONDARY MEMORY (INTERNAL MEMORY) (INTERNAL MEMORY) (EXTERNAL MEMORY) (EXTERNAL MEMORY) CPU CPU MAGNETIC MAGNETIC MAGNETIC MAGNETIC OPTICAL OPTICAL ON CHIP TAPE TAPE DISKREGISTER ON CHIP DISK DISK DISK REGISTER CACHE CACHE RAM ROM ROM RAM DRAM SRAM PROM PROM EPROM EPROM EEPROM DRAM SRAM EEPROM http://improvec.blogspot.in/ 13
    • Random Access Memory (RAM) It is volatile memory i.e. temporary memory. Performs both read and write operations. Usually hidden to users. http://improvec.blogspot.in/ 14
    • TYPES OF RAMStorage capacity is limited. DRAM SRAM http://improvec.blogspot.in/ 15
    • Static RAM Static RAM retains stored information only as long as power supply is on. Static RAMs are costlier and consume more power. http://improvec.blogspot.in/ 16
    • Static RAM (contd..) Static RAM is faster. It is used as cache memory. Static RAMs hold information in flip-flop, consisting of two cross coupled inverters. http://improvec.blogspot.in/ 17
    • Dynamic RAM Dynamic RAM loses its stored information in a very short time even though the power supply is on. Only one transistor is needed to form a memory cell and result in high packing density and moderate speed. http://improvec.blogspot.in/ 18
    • Dynamic RAM (contd) They consume less power. They are used where large capacity of memory is needed. Dynamic RAM is cheaper. It is used as main memory. http://improvec.blogspot.in/ 19
    • Random Access MemoryFig 1 http://improvec.blogspot.in/ 20
    • Read Only Memory (ROM) It is non-volatile memory .i.e. permanent storage. Performs only read operations. Limited storage capacity. http://improvec.blogspot.in/ 21
    • Types Of ROM1. PROM - (Programmable Read Only Memory)2. EPROM - (Erasable Programmable Read Only Memory)3. EEPROM - (Electrically Erasable PROM) http://improvec.blogspot.in/ 22
    • Cache Memory Cache memory is placed between the CPU and the main memory. It stores instructions and data which are to be immediately executed. http://improvec.blogspot.in/ 23
    • Cache Memory (contd...)It is not accessible to users i.e. informationcannot be written into cache memory by users.It increases the performance of the computerup to 15%. http://improvec.blogspot.in/ 24
    • SummaryIn this class, we have learnt about  Functions of memory. Types of memory. http://improvec.blogspot.in/ 25
    • Frequently Asked Questions1. Explain the types of memories?2. Explain the functions of memory? http://improvec.blogspot.in/ 26
    • Quiz1. Is RAM a Volatile memory? a. No b. Yes http://improvec.blogspot.in/ 27
    • Quiz:2. Is ROM a Non volatile memory? a. Yes b. No http://improvec.blogspot.in/ 28
    • Quiz3. What is the form of data in the memory? a. Decimal b. Binary c. Octal d. Hexadecimal http://improvec.blogspot.in/ 29