Ram-rom-ppt 132wm

SEMINAR ON RAM & ROM

PRESENTED BY 1)YATIN KSHIRSAGAR.

What Is Memory ?

Memory Is The Place Where Computer Stores the programme.

Types Of Memory:1)Ram (Random Access Memory) 2)Rom(Read Only Memory)

Basic Types Of Memory : 1]RAM (Random Access Memory)

2) ROM (Read Only Memory)

RAM (RANDOM ACCESS MEMORY): RAM or Random Access Memory is a read/write type of memory which is used by the processor to keep program. It is volatile type of memory or temporary memory which lose its contents when the power supply to it is switched off.

HISTORY OF RAM: Static RAM was first developed by Intel in 1969 to replace the traditional computer core memory systems that were available. The company's first successful product was the 64-bit bipolar high-speed RAM chip. It was called the 3130 Shottky model.

ROM (read only memory) : ROM or Read Only memory as its name suggest is a read only type of memory. On ROM can not be written data is written into it by the manufacturer.

Types Of Ram: 1) SDRAM (Synchronous DRAM) 2) DDR (Double Data Rate SDRAM) 3) DRAM I)DIMMS II)RIMMS

SDRAM (Synchronous DRAM): SDRAM is a new type of DRAM. SDRAM starting running at 66MHz, while DRAM is run at 50 MHz SDRAM is able to scale to 133 MHz (PC133) officially, and unofficially up to 180MHz or higher.

DDR (Double Data Rate SDRAM): As its name suggest it doubles the rate of data transfer of standard SDRAM by transferring data on the up and down tick of a clock cycle i.e. positive and negative.

DIMMS (dual in-line memory module) : These types of RAM are mounted on a printed circuit board and designed for use in personal computers. On the bottom edge of 168-pin DIMMs there are 2 notches, and the location of each notch determines a particular feature of the module.

RIMM ( Rambus inline memory module): RIMMs use only a 16-bit interface but run at higher speeds than DDR. To get maximum performance, Intel RDRAM chipsets require the use of RIMMs in pairs over a dual-channel 32-bit interface. You have to plan more when upgrading and purchasing RDRAM.

Advantages Of RAM: 1)RAM Is Small In Size. 2)RAM Is Volatile. 3)RAM Is Non-Static And Refreshing.

Types Of ROM: 1)PROM 2)EPROM 3)EEPROM

PROM (Programmable Read Only Memory) : Empty of data when manufactured. May be permanently programmed by the . PROMs provide flexible and economical storage for fixed programs and data, where high production volumes are involved.

EPROM (Erasable Programmable Read Only Memory): The Erasable PROM chip allows the stored data to erased and new data can be reprogrammed. It provides more flexibility during the development phase of digital system. EPROM is highly insulated. Hence it retains the stored information for more than a year. Access time is around 45 – 90 nanoseconds.

EEPROM (Electricity Erasable PROM): In an electricity erasable PROM, the contents of cells can be erased by the application of a high voltage.

advantages of ROM : 1) They are non-volatile. 2) They are cheaper than RAM. 3) They are static and do not refreshing. 4) They are more reliable than RAM as their circuit is simple. 5) They are available in longer sizes than RAM. 6) They are easier to interface than RAM.

Application of memory:

1) Memory i.e. RAM & ROM is Used in Domestic Computer . 2)Used in Servers i.e. Jaguar, Alias, Apache.

References

en.wikipedia.org www.google.co.in

Any Questions ?

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