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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 search258 articles
2005-08-17 Young ECC unveils white LEDs based on non-YAG tech
Components distributor Young ECC Electronics is unveiling new lines of white LEDs that are based on non-yttrium aluminum garnet (non-YAG) phosphor technology.
2008-06-30 What types of ECC should be used on flash memory?
NOR flash normally does not need error-correcting code (ECC). On the other hand, NAND requires ECC to ensure data integrity. NAND flash includes extra storage on each page to store ECC code as well as other information for wear leveling, logical to physical block mapping, and other software overhead functions.
2001-09-17 Qecc protocol analysis of OC-N/STM-N networks
This application note provides a data extraction solution to perform protocol analysis of Embedded Control Channel (ECC) information on STM-N/OC-N circuits.
2010-08-19 Probability chip startup starts off with ECC block
Lyric Semiconductor Inc. is licensing a technique to develop an error correction device for NAND flash.
2012-01-11 NAND flash touts embedded ECC
Toshiba's BENAND flash memory combines 4bit per 512B embedded correction code and 32nm process NAND flash memory are embedded in one package.
2004-11-26 NAND flash ECC algorithm
This app note presents error checking and correction of NAND flash ECC algorithm
2008-05-13 Micron ECC module for NAND flash via Xilinx Spartan-3 FPGA
This technical note describes the features of the Micron NAND Flash ECC module and how it calculates and implements ECC.
2006-11-23 Experts call for ECC-improved data security
Securing applications with elliptic curve cryptography was the focal point of discussion at the third annual Certicom ECC Conference held last week in Ontario, Canada.
2015-03-11 ECC bumps up mobile device reliability, efficiency
Here is a look at how error correcting code enables enhanced memory density and bandwidth while maintaining power neutrality and reliability.
2014-05-19 Cypress debuts asynchronous SRAMs with on-chip ECC
The Cypress 16Mb asynchronous SRAMs ensure data reliability in a variety of industrial, military, communication, data processing, medical, consumer and automotive applications.
2015-08-07 Cheaper, denser NAND need better ECC
In this article, we expound why PMC-Sierra switched from Bose-Chaudhuri-Hocquenghem codes to low-density parity check codes for error correction in its solid-state drive controllers.
2007-03-01 Boost ECC, solve NAND flash issues
Toshiba Corp. is rolling out four enabling technologies in a multipronged drive into the booming embedded NAND flash-memory market.
2006-02-20 Sun to support next-gen cryptography standard
Sun Microsystems has announced that the Sun Java System Web Server 7.0 will support Elliptic Curve Cryptography.
2007-10-02 Motorola sells embedded computing biz to Emerson
Emerson and Motorola have entered into a definitive agreement under which Emerson will acquire Motorola's Embedded Communications Computing business for $350 million in cash.
2006-08-21 Memory modules support AMD Opteron processors
Kingston Technology said its ValueRAM DDR2 ECC and ECC memory modules support next-generation AMD Opteron processors.
2013-08-28 Is a single-chip SoC processor what you need?
Find out when, where and why embedded developers should consider a single-chip SoC processor as alternative to a general-purpose microcontroller.
2007-03-19 Hynix claims 'fastest' 512Mbit mobile DDR SDRAM
Hynix Semiconductor Inc. claims it has developed the industry's fastest 185MHz 512Mbit mobile DDR SDRAM with error correction code.
2006-09-01 Getting reacquainted with NAND flash
For many consumer audio and video products, NAND flash memory is a better storage choice than HDD, especially in low-capacity applications (4Gbytes or less).
2006-09-01 Crypto model checks IP leakage in fabs
Security specialist Certicom rolled out a hardware-based approach to protecting silicon IP using its elliptic-curve cryptography technology and a 20,000-gate embedded core. The company hopes to gain an early-mover advantage as commercial and military developers step up efforts in semiconductor security.
2005-03-23 Controllers with enhanced features
Selco/ECC's new 2698 and 2699 cold/hot controllers offer enhanced functions for sensing and control of heating, cooling and humidity in a variety of products.
2007-03-14 China start-up eyes growth in memory market
China memory start-up GigaDevice Semiconductor Inc. says that it is positive about its development in the local memory market with their strategy based on tapping local advantages and constant technology innovation.
2015-05-28 36Mb synchronous SRAMs flaunt on-chip error-correcting code
The devices from Cypress claim to deliver the highest levels of data reliability, simplifying designs for various military, communication and data processing applications.
2004-04-20 WED module targets memory system apps
The 2GB DDR SDRAM registered ECC memory module from White Electronic Designs is claimed by the company to provide maximum performance for memory system apps.
2001-09-24 Use of 168-pin ESDRAM DIMMs in x32 data path applications
This application note focuses on the use of synchronous, non-ECC (x64) 168-pin DIMMs in x32 data path applications.
2011-04-11 Toshiba takes 24nm route for NAND flash
SmartNAND integrates NAND flash memory with a control IC that can perform error checking and correction, thereby removing the burden of ECC from the host processor and enhancing speed performance.
2013-11-20 Smart card offers security for banking, eGov markets
NXP's SmartMX2-P40 offers dedicated co-processors for asymmetric RSA/ECC and symmetric DES/AES cryptography, and comes with a certified hardware abstraction layer and crypto library.
2004-12-10 Single error correction and double error detection
This app note describes the implementation of an error correction control (ECC) module in a Virtex-II, Virtex-II Pro, or Virtex-4 device.
2013-08-13 SATA SSD flash controller boasts military secure erase
The IPA-SA129-CT SSD flash controller for SATA applications supports SATA 6Gb/s speeds and features enterprise class ECC:BCH error correction, True End-to-End CRC and AES-XTS-256bit encryption.
2004-05-31 Rosy forecast for China's IC industry
China's IC industry is on the fast lane to growth, according to China Semiconductor Industry Association (CSIA) and China Council for the Promotion of International Trade Electronics and Information Industry Sub-Council (CCPIT-ECC).
2009-01-07 Processor blade packs Intel Xeon, memory controller hub
From Adlink Technology comes the cPCI-6920 series, the PICMG 2.0 compliant 6U CompactPCI dual-processor blade featuring two quad-core/dual-core Intel Xeon processors, server class Intel 5100 chipset, four SO-RDIMM sockets for up to 16Gbyte DDR2-667 registered ECC memory and 1066MHz front side bus.
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