Seminar On RAM & ROM

PRESENTED BY PRESENTED BY 1) YATIN KSHIRSAGAR. 2) GHANSHYAM DUSANE. 3) GANESH RAJOLE.

Contents:- # Memory. # Types of Memory i.e. RAM & ROM. # History Of RAM. # Types Of RAM. # Brief Description Of RAM. # Advantages Of RAM. # Applications OF RAM. # History Of ROM. # Types Of ROM. # Brief Description Of ROM. # Advantages Of ROM. # Applications OF ROM. # References To Get More Information. # Conclusion. # Any Questions.

What Is Memory ? Memory Is The Place Where Computer Stores the Programme/Information.

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.

Types Of RAM: 1) SDRAM (Synchronous DRAM) 2) DDR (Double Data Rate SDRAM) 3) DRAM I)DIMMS II)RIMMS 4)FRAM (Ferroelectric RAM) I

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.

Dynamic Random Access Memory (DRAM):- I t is a type of random-access memory that stores each bit of data in a separate capacitor within an integrated circuit. The capacitor can be either charged or discharged; these two states are taken to represent the two values of a bit, conventionally called 0 and 1.

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.

FRAM (Ferroelectric RAM):- It is a random access memory that combines the fast read and write access of dynamic RAM (DRAM). The most common kind of personal computer memory – With the ability to retain data when power is turned off. It is fast memory with a very low power requirement, it is expected to have many applications in small consumer devices such as Personal Digital Assistants (PDA)

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

HISTORY OF ROM: ROM (Read Only Memory) was invented in 1956 by Sony and was available for public sale on October 1 st 1962 (Japan) / America on March 2nd 1964.

Types Of ROM:- 1) EPROM (Erasable Programmable Read Only Memory) 2) RIMM ( Rambus in- line memory module)

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.

RIMM ( Rambus in-line 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 user. PROMs provide flexible and economical storage for fixed programs and data, where high production volumes are involved.

EEPROM (Electricity Erasable PROM): In an electricity erasable PROM, the contents of cells can be erased by the application of a high voltage. It is a type of non-volatile memory used in computers and other electronic devices to store small amounts of data that must be saved when power is removed, e.g., calibration tables or device configuration.

EPROM (Erasable Programmable Read Only Memory) :- It is a type of memory chip that retains its data when its power supply is switched off. In other words, it is non-volatile. It is an array of floating- gate transistors individually programmed by an electronic device that supplies higher voltages than those normally used in digital circuits.

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.

References To Get More Information en.wikipedia.org

Conclusion:- In today’s world of ever growing need of faster and high-end computers the need for faster and better memory technology is never ending. It is the important part of Computer & other devices where use memory.

Any Questions ? ?????????????????

!!!!!!!! THANK YOU !!!!!!!!!