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What is ECC?
Error-correction code (ECC) is redundant data that a sender adds to its messages in a system of error control for data transmission called forward error correction (FEC). This allows the receiver to detect and correct errors (with some limitations) without asking the sender for additional data. The advantages of FEC are that a back-channel is not required and retransmission of data can often be avoided though this is achieved at the cost of higher bandwidth requirements. FEC is therefore applied where retransmissions are relatively costly or impossible. In particular, FEC information is usually added to most mass storage devices to protect against damage to the stored data.
For instance, electrical or magnetic interference inside a computer system can cause a single bit of DRAM to flip to the opposite state. This problem can be mitigated by using DRAM modules that include extra (redundant) memory bits and memory controllers that exploit these bits. These extra bits are used to record parity or to use an ECC. Parity allows the detection of an odd number of wrong bits. The ECC may allow a single-bit error to be corrected and double-bit errors to be detected.
Error detection and correction in computer systems keeps going in and out of vogue. Seymour Cray famously said "parity is for farmers" to explain why he left it out of the CDC 6600. He included parity in the CDC 7600, and reputedly said "I learned that a lot of farmers buy computers."
total search91 articles
2008-09-09 Tiny HDMI transmitter maximizes control for HD devices
Analog Devices has launched the ADV7521NK, claimed as the industry's smallest, low-power HDMI ver 1.3 transmitter. This provides faster video delivery to HDTVs and other high-definition devices.
2006-03-14 Synchronous rectifier IC boosts flyback, resonant half-bridge designs
International Rectifier touts its SmartRectifier chipset, which comprises the IR1167 with external HEXFET MOSFETs, as the first high-efficiency solution that's viable from the standpoint of technology and cost.
2014-12-15 ST rolls out MCU portfolio in compact packages
The STM32F446 MCUs offer additional options for designers by integrating enhanced ARM Cortex-M4 processing performance, compact 256KB or 512KB on-chip Flash all with 128KB RAM.
2009-12-09 SR controller promises high accuracy, reliability
International Rectifier has launched the IR11672A SmartRectifier IC with advanced Minimum On Time protection circuitry for energy-efficient AC/DC power converters.
2004-12-21 Solution enables designers to comply with CA regulation
Power Integrations unveiled a suite of solutions enabling manufacturers to comply with the new, mandatory energy-efficiency standards of California.
2006-11-10 SmartRectifier IC targets home entertainment apps
International Rectifier has introduced the IR1166 SmartRectifier IC for AC-DC power converters used in home, computer and audio applications.
2008-11-10 Skyworks overtakes Spreadtrum in iPhone arena
Skyworks and Spreadtrum have posted dramatically different financial results for their most recently concluded quarters.
2008-01-10 Simplay Labs steps up partnerships
Simplay Labs is beefing up further alliances with three digital entertainment solutions companiesZensys, Sensio Technologies and MET Laboratories.
2008-01-14 Silicon Image readies HDMI 1.3 receivers for HDTVs
At the 2008 International CES last week, Silicon Image Inc. introduced the PinnaClear SiI9223 four-port receiver and the SiI9127 two-port receiver, two HDMI integrated receivers that deliver the advanced HDMI 1.3 HDTV features including 1080p Deep Color and x.v.Color expanded color gamut.
2004-03-03 SatCon's conversion system gets UL-1741 certification
SatCon Technology Corp.'s PowerGate AE-PV 50kW photovoltaic power conversion system (PCS) has been UL-1741 certified.
2008-04-28 Samsung brings 3D experience to plasma HDTV
Samsung's Series 4 450 plasma HDTVs enable consumers to have an interactive 3D experience for enjoying a wide range of content, including movies, video games and Web content.
2008-02-21 Reference design tailored for game console power adapters
ON Semiconductor has introduced a GreenPoint reference design for 200W power adapters used to power game consoles.
2002-08-20 Qiao Xing signs Cellon as preferred customer
Qiao Xing Universal Telephone has signed a preferred customer agreement with Cellon Int. and will begin shipping the Cellon-powered Q200 handset to its stores throughout China.
2005-08-25 Protecting the HDMI interface
HDMI combines a high-speed unidirectional TMDS data link with low speed, bi-directional control and status links and configuration protocols in a single user-friendly high-performance connector.
2007-11-02 Products vie for role in HDMI arena
Last year's adoption of HDMI 1.3 has advanced the adoption rate of sources that provide 1,080p resolution such as Blu-ray and HD DVDand as HDMI's popularity grows, so does its list of supporters.
2011-04-25 Power supplies targets IT, medical apps
Emerson Network Power has announced the expansion of their NPS6x-M series of power supplies ideal for IT and medical applications.
2007-09-25 Power conversion ICs deliver up to 150W
Power Integrations has unveiled the TOPSwitch-HX family of AC-DC power conversion ICs that enables best-in-class efficiency over the entire load range and delivers up to 150W with a heat sink.
2006-06-27 Power adapter solution delivers 88% efficiency
ON Semi said its latest design blueprint achieves low standby power and promises 88 percent energy efficiency.
2006-09-26 Port protection solutions support HDMI 1.3
California Micro Devices has introduced two new MediaGuard devices optimized for the latest HDMI capabilities including higher speed and cable length support.
2010-08-17 PoE midspan line gets 60W model
Phihong boasts lowest-cost 60W midspans
2006-08-07 Philips unrolls 'first' HDMI-compliant ESD protection IC
Royal Philips Electronics has introduced the IP4776CZ38, dubbed as the industry's first ESD protection chip to support the recently released HDMI 1.3 specification.
2004-01-01 PC eyes digital home, network processor ready for limelight
Multimedia and network processors are seen to expand in the upcoming year due to the growing consumer demands on multimedia apps.
2014-10-14 Octa-core SoC targets high-end gaming, video OTT box markets
The device is based on TSMC's 28nm HPC process and claims to boost system performance with low heat, allowing ODMs/OEMs to make OTT boxes at competitive BOM costs.
2004-10-18 Miniature module adapts IEEE-488 test gear for USB
ICS' 488-USB USB-to-GPIB controller module should prove cost-effective and useful in extending the life of test equipment that might otherwise be deemed obsolete.
2015-04-08 Maximising efficiency at lower loads
Here's a look at a power platform that builds on the LLC resonant topology. It aims to help designers overcome the challenge of maximising light-load efficiency without increasing the bill of materials.
2006-03-17 Matsushita rolls HDMI control for flat TV sets
Matsushita Electric will offer flat TV sets using high-definition multimedia interface technology in Tokyo next month, with an international introduction following shortly thereafter.
2005-04-13 Marvell touts WLAN solutions at IIC-China
Marvell Semiconductor presented its WLAN solution including 801.11g(b) access point/gateway and WLAN embedded solutions during the IIC-China Conference in Shenzhen.
2008-01-10 Low-pin count interface facilitates mobile device-HDTV hook-up
Silicon Image Inc. has revealed at this week's Consumer Electronics Show (CES) its Mobile High-Definition Link (MHL) technology, which enables mobile phones, digital cameras, media players and other mobile devices to link directly to HDTVs.
2010-03-17 Low-cost 32bit MCUs delivers up to 30 DMIPS
At 24MHz with zero wait state embedded flash memory access, the STM32 Value Line delivers up to 30 DMIPS, outperforming most of the 16bit processors.
2006-07-03 Linear replacement adapter delivers 5W in small footprint
Phihong USA announced it has developed a cost-effective 5W linear replacement adapter that promises high efficiency in a small package size.
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