Hellow Viewers In This Slide I Just Show Types Of Memory Chips, RAM-ROM, Cache Memory , Static Memory, Dynamic Memory. Kind Of Static RAM and Kind Of Dynamic RAM and Obviously ROM

1. MAHE KARIM
CSE,DIU
www.about.me/mahekarim

2. WHAT IS MEMORY ?
• A memory chip is a small computer device used to store
information, data or a program that is run on a computer or
other electronic device
• There are several different types of memory chips, although
some are more commonly used than others.

3. TYPES OF MEMORY
• Normally Two (02) Types of Memory
RAM – Random Access Memory / Volatile Memory & Writeable
ROM – Read Only Memory / Non-Volatile Memory & Read Only

4. VOLTAILE AND WRITEABLE MEMORY

5. MEMORY STEP – WHERE WHO WORK

6. CACHE MEMORY
• A CPU cache is a cache used by the
central processing unit (CPU) of a
computer to reduce the average
time to access data from the
main memory. The cache is a
smaller, faster memory which
stores copies of the data from
frequently used main memory
locations.

7. EPROM
• EPROM : Erasable Programmable Read-
Only Memory.
• Reprogramming requires up to 20
minutes of high-intensity UV light
exposure.
Flash EEPROM : Electrically Erasable
Programmable ROM.
• Also called EAROM (Electrically
Alterable ROM) and NOVRAM (NOn-
Volatile RAM).
• Writing is much slower than a
normal RAM.
•
• Used to store setup information,
e.g. video card, on computer
systems.
• Can be used to replace EPROM for
BIOS memory.

8. DRAM
• DRAM:
• SRAMs are limited in size (up to about 128K X 8).
• DRAMs are available in much larger sizes, e.g., 64M X 1.
•
• DRAMs MUST be refreshed (rewritten) every 2 to 4 ms
• Since they store their value on an integrated capacitor that loses charge over time.
•
• This refresh is performed by a special circuit in the DRAM which refreshes the entire memory
using 256 reads.
• Refresh also occurs on a normal read, write or during a special refresh cycle.
• More on this later.
•
• The large storage capacity of DRAMs make it impractical to add the required number of address pins.
• Instead, the address pins are multiplexed .

9. DRAM’S – TMS4464 DIAGRAM

10. THANK YOU