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aMLC-Slide5

aMLC technology has several advantages over eMLC technology. eMLC was designed for enterprise applications such as caching and write/erase intensive usage models where data retention or write performance is not a major requirement. eMLC based devices only provide an advantage over MLC in endurance, while aMLC allows for the endurance improvement in addition to improving data retention and write performance versus traditional MLC. This means aMLC devices provide advantages to both endurance and write performance. aMLC’s advantage is gained by utilizing firmware technology to transfer NAND Flash from four states MLC into two states. The other MLC technologies remain 4 states yet selecting 2 strong states. There is certain level performance improvement of other MLC technologies, but they are not as significant and stable as those provided by aMLC technology. There is another trend occurring at the SSD drive level to maintain write performance from a sequential bandwidth point of view is to increase multiplexing with more and more NAND ICs at once. This has resulted in the average and minimum client/enterprise SSD capacity to continue to increase. The average 2.5” capacity point is well over 100 GB. For embedded applications, the capacity requirements are often lower than 100 GB and thus may have NAND cost erosion trends offset with a higher minimum capacity point. aMLC based products will be offered at densities as low as 8 GB and will offer a much lower floor cost while still maintaining competitive read and write performance. This means designers can utilize aMLC based solutions when the application does not have high density requirements. The ATP aMLC spec is defined after a series of NAND flash level and storage device level testing. This creates Flash based storage solutions that meet “RDPPP”: high Reliability, main stream Density, high P/E cycles, high Performance, and competitive Pricing Reliability, on top of all valuable factors, shows ATP’s persistence in offering high quality product with great features.

PTM Published on: 2014-12-17