750 What s Flash Memory

From gpu
Revision as of 12:18, 15 November 2025 by Adela15C84 (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search


What is flash memory? It is a type of memory that may store data with out power and might erase memory in blocks. It's a kind of electronically erasable programmable learn solely memory (EEPROM). Computer systems retailer info on their memory chips in binary, which suggests everything is reduced to a 1 and a 0. When the computer needs to learn the knowledge, it scans the memory chip and translates the 1s and the 0s back into one thing that we will read, or a picture or a movie. Each character you're reading has been rendered from binary. Nevertheless, the computer doesn’t actually retailer the information as 1s and 0s. There are three completely different strategies it uses. The primary method is in random entry memory the place the knowledge is saved using electrons. A memory chip is made up of billions of capacitors. These capacitors are ready to carry electrons. If a capacitor is holding electrons, then it is a 1 and if a capacitor is empty of electrons, then it's a 0. A single capacitor is a bit of knowledge and there are 8 bits in a byte, so a byte has 8 capacitors.



"Hello" has forty different bits of knowledge, Memory Wave which is 5 bytes. A 16-gigabyte memory card has 128 billion capacitors. The capacitors can not hold the electrons when the pc is turned off, so RAM is just usable when the pc has power. The second manner is on the hard disk drive where the data is stored magnetically. The computer has a spinning hard disk and it shops the information on it by marking microscopic lines that are magnetic. When the pc reads the data, each magnetic line is taken into account a 1 and Memory Wave every nonmagnetic line is considered a 0. The third method uses transistors to hold a cost and this is how flash memory works. A transistor is product of a conductive material like silicon or germanium. They can take in electrons in the identical means as a capacitor, however they don’t lose them. In RAM, the presence of electrons makes a 1, but with flash memory, an electron cost makes a zero and no charge is a 1. Because they don’t lose their electrons, they keep the info when they are switched off as properly.



A transistor has two ends. The electrons can enter in by the one end, referred to as the source, and they can depart the transistor by the other finish, known as the drain. There is a gate at one finish and electrons are saved in the transistor when the gate is closed, being read as 0. If the gate is left open, the electrons go straight via and the transistor is empty, being read as 1. With non-flash memory, when the ability is turned off, the electrons don’t stay within the transistor. Flash drives must work when there is no such thing as a power supply and this is completed with one thing referred to as a floating gate. A floating gate is a gate simply just like the one that keeps the electrons in the transistor, but it's separated from the transistor by a skinny, oxide layer. The oxide is an insulator but as a result of it's skinny, electrons can go through it if there's a strong sufficient present.



When the pc writes to a flash memory, it uses enough present that the electrons fill the transistor, cross across the insulating layer and persist with the floating gate. The computer uses sufficient current for the electrons to pass over the floating gate, but they don’t have sufficient vitality to get back across, so that they keep caught to the floating gate. They can keep that approach for years without any additional energy and without lack of memory. If you wish to erase data from the flash memory, the computer supplies an electric current to the entrance of the transistor and a damaging cost to the gates. This repels the electrons on one side and attracts them on the opposite so that they bounce across the insulating layer and depart the transistor. Flash memory drives are very helpful as a result of they will store the knowledge without needing any energy, however they can’t be used indefinitely. Each time the gates are electrified, boost brain function they wear somewhat. Completely different drives have completely different ratings however they're good for about 100,000 write / erase cycles before they start to leak data. And that is what I discovered immediately.