Flash memory

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1. 1 Flash Memory 2 History of Flash Memory 3 Types of Flash Memory 4 Uses of Flash Memory 5 Examples of Flash Memory 6 Advantages & Disadvantages of Flash Memory 7 Future of Flash Memory

2. FLASH MEMORY Flash memory is a non-volatile memory .That can be electrically erased and reprogrammed It was developed from EEPROM ( electrically erasable programmable read-only memory ) Flash memory is a new memory technology that allowed stores data to be saved when the memory device was disconnected from its power sources. 1

3. HIstory Flash memory was invented Dr.Fujio Masuoka while working for Tosibha in 1980. Intel corporation introduced the first commercial NOR type flash chip in 1988. Tosibha announced NAND flash at the 1989 international electron device meeting. 2

4. internal structure of flash memory 3

5. types of flash memory 4

6. nor flash memory NOR flash memory was first introduced by Intel in1988. Developed to replace read only memory ( ROM ). NOR flash is more expensive and takes longer to erase and write new data . NOR is most often used in mobile phones . ♦ Can access any memory cell ♦ Slow sequential access 5

7. nand flash memory NAND flash was introduced by Toshiba in 1989 . Developed to replace hard disks NAND has significantly higher storage capacity than NOR . It has found a market in devices to which large files are frequently uploaded and replaced . MP3 players, digital cameras and USB drives use NAND flash ♦ Can only access pages ♦ Faster sequential access 6

8. Manufacturers of flash 7

9. uses of flash memory Flash memory generally used in computers, television, set-up box, cell phone, digital cameras, mp3 players, global position system . We used the flash memory to store our data reprogrammed data . Flash memory is also used in much industrial applications . 8

10. Example of flash memory 9

11. Advantages of flash memory Flash memory is very durable and portable devices which we use every where easily . We can store much and more data in flash memory. We can read and erase our data easily. 10

12. Disadvantages of flash memory Both NAND / NOR memory has limited number of programming/erasure cycles . Virus can easily transfer in flash memory . When flash memory is crash then data is lost. 11

13. Future of flash memory Continues to be among the most aggressively scaled electronic technologies Memory cell size minimum of 20 nm expected to be met in 2010 May be replaced by Phase-Change RAM or other emerging technologies . In the future size of flash memory cell is decrease and the capacity is increase. 12

14. conclusion Flash memory is a widely used reliable and fixable non-volatile memory to store software code and data in a micro controller. However as with any programmable and erasable memory . Physical parameters must be understood and the application for a long time data retention time. And cumulative program must be handled according to the DATA sheet. 13

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