RAM/ROM and its TYPES
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RAM is the primary memory of a computer that can access any memory cell directly. The two main types are DRAM and SRAM. DRAM (dynamic RAM) is commonly used in computers and needs to be refreshed to retain data. It stores each bit in a storage cell with a capacitor and transistor. ROM is a permanent, non-volatile memory that usually cannot be written to by the user. The main types are PROM, EPROM, EEPROM and flash memory.
RAM/ROM and its TYPES
- 2. What is RAM? And what are it’s kinds? The Random access memory, called "RAM" in short, is also known as the primary memory of the computer. RAM is considered as random access because of the fact that it can access any memory cell directly with the knowledge of the point of intersection of the row and column at that cell. • TWO MAIN TYPES OF RAM: DRAM SRAM
- 3. What is dynamic memory? Dynamic Random Access Memory is a type of memory that is typically used for data or program code that a computer processor needs to function. It is also known as DRAM which is a common type of RAM used in Personal computers, workstations and servers.
- 4. How does DRAM store the data? DRAM stores each bit of data or program code in a storage cell. A DRAM storage cell is dynamic that it needs to be refreshed to compensate for charge leaks from the capacitor. Capacitor transistor Storage cell (where DRAM stores data)
- 6. WHAT IS ROM? Read-only memory (or simply ROM) is a type of computer memory. It’s a permanent/non- volatile memory. Usually, the USER cannot write to the ROM. ROM is used for the Basic Input /Output System(BIOS).
- 7. TYPES OF ROM There are four basic ROM types:- PROM - Programmable Read Only Memory. EPROM - Erasable Programmable Read Only Memory. EEPROM - Electrically Erasable Programmable Read Only Memory. Flash Memory.
- 8. Like ROM ,the PROM is a non-volatile memory. The contents cannot be modified once it’s programmed. For the PROM ,the writing process is performed electrically.
- 9. Erasable Programmable Read Only Memory- (EPROM) It’s UV erasable programmable read only memory. The contents can be erased by exposing the EPROM into Ultraviolet(UV) Lights. EPROM is more expensive than PROM.
- 10. It’s type of non-volatile memory used in computers and other electronic devices. Can be electrically programmed & electrically erased by user. Write operation takes longer time than Read operation. More expensive than EPROM.
- 11. The newest form of semiconductor memory is Flash Memory. Like EEPROM, flash memory uses an Electrical Erasing Technology. It is possible to erase just blocks of memory rather than an entire chip. Flash memory is widely used with cell phones, digital cameras, printers etc.