MRAMShort for magnetoresistive RAM, or magnetic RAM, a non-volatile RAM memory technology that uses magnetic charges to store data instead of electric charges, such as those used in SRAM and DRAM technologies.
Unlike a technology such as DRAM, which requires a constant flow of electricity to maintain the integrity of the data, MRAM will retain data even when the power is turned off and only requires a small amount of electricity to store data bits. For example, in a PC enabled with MRAM, the computer would start up instantly instead of having to wait for the BIOS to locate and load the computer��s operating system software.
Technically, MRAM works by placing millions of magnetic "sandwiches" on a silicon substrate, with tiny parallel wires running in one direction on top of them and more perpendicular wires running below, creating a woven effect in the wiring. A single bit is represented at each point where the top and bottom wires cross. To write a bit onto the chip, a current passes through a wire on top of the sandwich and flips the polarity on one of the magnets. To read a bit from a chip, a current travels through the structure and measures the resistance of each magnet. Low resistance equals "0" and high resistance equals "1." The sandwiches remain in their magnetic states until the data is rewritten or erased by the system.
MRAM, first developed by IBM in the 1970s, is expected to replace DRAM as the memory standard in electronics.
Perceptual computing is the ability for a computer to recognize what is going on around it. More specifically, the computer can perceive the... Read More »Apple Pay Promises to Strengthen Payment Security
Experts believe that Apple Pay and other competitive payment systems will be far more secure than cards, even cards equipped with EMV chips. Read More »The Great Data Storage Debate: Is Tape Dead?
Tape clearly is on the decline. But remember, legacy systems can hang for a shockingly long time. Read More »
A network is a group of two or more computer systems or devices, linked together to share resources, exchange files and electronic communications.... Read More »Computer Architecture Study Guide
This Webopedia study guide describes the different parts of a computer system and their relations. Read More »Webopedia Polls
The trend for the past two years has been for shoppers to spend more online during the holiday season. How do you typically shop for holiday... Read More »
Stay up to date on the latest developments in Internet terminology with a free weekly newsletter from Webopedia. Join to subscribe now.
- Watch Datamation's editor James Maguire moderate roundtable discussions with tech experts from companies such as Accenture, Dell, Blue Jeans Network, Microsoft and more »