EMMC Application Brief
- eMMC's Past Life
A. Overview of eMMC
EMMC (Embedded multimedia Card) for the MMC association entered into the embedded memory standard specifications, mainly for mobile phone products. One obvious advantage of EMMC is the integration of a controller in the package, which provides a standard interface and manages Flash, allowing handset vendors to focus on other parts of the product development and shorten the time to market products. These features are of equal importance to NAND suppliers who want to reduce the size of lithography and lower costs.
two. Advantages of eMMC
eMMC is currently the most popular local storage solution for mobile devices, with the aim of simplifying the design of the phone memory, due to the different brand of NAND flash chips including Samsung, Kingmax, Toshiba, or Hynix, Mae Guang (Micron), etc., Need to be redesigned according to the product and technical characteristics of each company, and no technology in the past has been able to generic all of the card's NAND flash chips.
And every time the NAND flash process technology, including 70 NM evolution to 50 nm, and then evolve to 40 nm or 30 NM process technology, mobile phone customers will also have to redesign, but semiconductor products every 1 years of technology will be new, memory problems also drag on the speed of the introduction of mobile phones, So, like eMMC, the concept of wrapping all the memory and control chips that manage NAND flash on 1 MCP is becoming increasingly popular.
eMMC design concept, is to simplify the use of memory in the phone, the NAND flash chip and control chip design into 1 MCP chip, mobile phone customers only need to purchase EMMC chip, put into the new phone, do not need to deal with other complex NAND flash compatibility and management issues, The biggest advantage is to shorten the market cycle of new products and research and development costs, speed up the speed of product innovation.
Flash flash process and technology changes quickly, especially the TLC technology and process down to the 20nm stage, the management of Flash is a huge challenge, using EMMC products, the main chip manufacturers and customers do not have to focus on the production of flash internal and product changes, Just manage the flash through the EMMC standard interface. This can greatly reduce the difficulty of product development and accelerate time to market.
eMMC can be a good solution to MLC and TLC management, ECC debugging mechanism (Error correcting Code), Block Management (Block Management), the average erase storage block technology (Wear leveling), Block Management (Command Management), low power management, and more.
eMMC Core advantage is that manufacturers can save a lot of time to manage NAND flash chips, do not care about the NAND flash chip process technology evolution and product replacement, do not have to consider exactly which NAND flash flash memory chip, so, eMMC can accelerate the time to market and ensure the stability and consistency of products.
Three Structure and specifications of eMMC
The EMMC structure consists of an embedded storage solution with an MMC (multimedia card) interface, a flash memory device, and a master controller-all in a small BGA package. Interface speeds up to 52MB,EMMC per second with fast, upgradeable performance. At the same time, the interface voltage can be 1.8v or 3.3v.
EMMC (Embedded Multi Media Card) uses a unified MMC standard interface to encapsulate high-density NAND flash and MMC Controlle in a BGA chip. For the characteristics of Flash, the product has included flash management technology, including error detection and correction, flash average erase, bad block management, power-down protection and other technologies. The user does not have to worry about the product internal flash wafer processes and process changes. At the same time eMMC single chip to save more space within the main board.
Four. The development trend of eMMC
EMMC Standard rapid evolution, from the development of EMMC V4.3 to V4.4,v4.41,emmc V4.5, EMMC the next era will be Samsung Electronics (Samsung Electronics)-led UFS (Universal Flash Storage) Specification connection stick, will be the mobile RAM and other chip functions are covered. At present, the most popular eMMC V4.41 has made a lot of improvements based on the original Standard 4.3, including two times the memory interface performance of previous generation products, flexible partition management and perfect security alternatives, advanced Terminal Interface (HPI) and so on. EMMC version 4.4, interface speed of up to 104mb/s.
eMMC will continue to be revised to version 4.5, followed by UFS version 1.0. We see UFS as a new interface standard for NAND flash, which is connected to eMMC 4.5, and is expected to become one of the key application standards for embedded storage media in emerging smart mobile devices such as smart phones and tablet computers. UFS will provide extremely high speeds, interface speeds of up to 300mb/s, to instantly store large multimedia files at high speed, while reducing power consumption when used on consumer electronic devices.
- eMMC instances
- EMMC Application Examples
EMMC Chip Applications
