Semiconductor memory

Computer memory types

Volatile

RAM DRAM (e.g., DDR SDRAM) SRAM In development T-RAM Z-RAM TTRAM Historical Delay line memory Selectron tube Williams tube

Non-volatile

ROM Mask ROM PROM EPROM EEPROM Flash memory Early stage FeRAM MRAM PRAM In development CBRAM SONOS RRAM Racetrack memory NRAM Millipede memory Historical Drum memory Magnetic-core memory Plated wire memory Bubble memory Twistor memory

Semiconductor memory is an electronic data storage device, often used as computer memory, implemented on a semiconductor-based integrated circuit. Examples of semiconductor memory include non-volatile memory such as Read-only memory (ROM), magnetoresistive random access memory (MRAM), and flash memory. It also includes volatile memory such as static random access memory (SRAM), which relies on several transistors forming a digital flip-flop to store each bit, and dynamic random access memory (DRAM), which uses one capacitor and one transistor to store each bit. Shift registers, processor registers, data buffers and other small digital registers that have no memory address decoding mechanism are not considered as memory.

Data is accessed by means of a binary memory address to the memory. If the memory address consists of M bits, the address area consists of 2^M addresses per chip. Semiconductor memory are manufactured with a certain word length (number of 1-bit cells sharing the same memory address) that power of two, typically M=1, 2, 4 or 8 bit per chip. Consequently, the amount of data stored in each chip is MN² bits. Possible figures are 1, 2, 4, 8, 16, 32, 64, 128, 256 and 512 bit, kbit, Mbit, Gbit and Tbit, here defined by binary prefixes. By combining several integrated circuits, memory can be arranged for a larger word length and/or address space than what is offered by each chip, often but not necessarily a power of two.

This computer storage-related article is a stub. You can help Wikipedia by expanding it.v · Categories: Digital electronics Computer memory Integrated circuits Computer storage stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем сделать НИР Lotka's law United States Senate elections, 1952 Look at other dictionaries: semiconductor memory — puslaidininkinė atmintinė statusas T sritis automatika atitikmenys: angl. semiconductor memory; semiconductor storage unit vok. Halbleiterspeicher, m rus. полупроводниковое запоминающее устройство, n pranc. mémoire à semi conducteurs, f …   Automatikos terminų žodynas semiconductor memory — puslaidininkinė laikmena statusas T sritis informatika apibrėžtis ↑Laikmena, kurioje duomenims įsiminti naudojami puslaidininkiai prietaisai, dažniausiai tranzistoriai. Dabar beveik visos laisvosios prieigos atmintys yra puslaidininkinės.… …   Enciklopedinis kompiuterijos žodynas semiconductor memory — /ˌsɛmikənˌdʌktə ˈmɛmri/ (say .semeekuhn.duktuh memree) noun a computer memory with storage elements formed by integrated semiconductor devices …   semiconductor memory — ▪ device       any of a class of computer memory devices consisting of one or more integrated circuits. (See computer memory.) * * * …   Universalium semiconductor memory — noun Any device used to store and retrieve digital information that is manufactured using integrated circuit technology …   Wiktionary Memory (disambiguation) — Memory is an organism s ability to store, retain, and recall information. Memory or Memories may also refer to: Contents 1 Music 1.1 Songs 1.2 Alb …   Wikipedia Memory bandwidth — is the rate at which data can be read from or stored into a semiconductor memory by a processor. Memory bandwidth is usually expressed in units of bytes/second, though this can vary for systems with natural data sizes that are not a multiple of… …   Wikipedia semiconductor storage unit — puslaidininkinė atmintinė statusas T sritis automatika atitikmenys: angl. semiconductor memory; semiconductor storage unit vok. Halbleiterspeicher, m rus. полупроводниковое запоминающее устройство, n pranc. mémoire à semi conducteurs, f …   Automatikos terminų žodynas Semiconductor device fabrication — Semiconductor manufacturing processes 10 µm 1971 3 µm 1975 1.5 µm 1982 …   Wikipedia Semiconductor device — Semiconductor devices are electronic components that exploit the electronic properties of semiconductor materials, principally silicon, germanium, and gallium arsenide. Semiconductor devices have replaced thermionic devices (vacuum tubes) in most …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”