Introduction to Types of Memory Chips

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