What is eMMC?
eMMC stands for “Embedded Multi-Media Controller“, which refers to a package of flash memory and integrated flash memory controller on the board. The eMMC is made up of at least three components: an MMC (multimedia card), flash memory and a flash memory controller – all included in the standard BGA package.
Today’s embedded applications such as digital cameras, smartphones, tablets typically store content on flash memory. Previously, a separate controller was needed to control the reading and writing of applications.
However, semiconductor technology has grown to allow for increased storage capacity, which makes using this controller work outside of flash memory becomes ineffective. As a result, the eMMC was developed, becoming the standard for grouping controllers into memory.
As the eMMC is enhanced, standards will also bring features such as secure erase and shredding, high-level interoperability to meet security and work requirements. The eMMC was born to improve data transfer rates on high-memory, high-definition video memory chips, but later generations will do more for many applications, with each generation having New features, providing a better user experience.
The widely accepted eMMC standard is v4.5, which is given in JESD84-A441: Embedded MultiMediaCard (eMMC) Product Standard v4.5 by JEDEC in June 2011. JEDEC recently released JESD84-B45: Embedded MultiMediaCard (eMMC), Electrical Standard (Version 4.5 Device) for eMMC v4.5 in June 2011.
Where is eMMC used?
eMMC is suitable for high demand applications such as mobile electronics (smart phones, tablets, multimedia players, PDAs, navigation systems, digital cameras). eMMC can be used on mobile devices, memory expansion solutions and the replacement of traditional storage methods (such as HDD).
Benefits of eMMC
The eMMC architecture integrates a flash memory controller into a package that simplifies the design of the application interface, enabling low-level flash memory management. Product developers can simplify the static-memory interface design and standardization process – reducing the time required before launching the product, supporting future flash devices.
In other words, eMMC hides the complexity of flash memory technology in a convenient “plug and play” package, reducing the time it takes for developers.
In addition, the eMMC also eliminates software interface development for all types of NAND memory by integrating an embedded controller into chip memory, delivering easy-to-use memory solutions, high-speed data transfer on devices such as mobile.
Thanks to the eMMC, there is no need for expansion slots by stacking memory functions vertically, which gives very small footprints on the device memory. This design also allows the supplier to source components from more locations, thus reducing costs, increasing revenue.
What is mandatory software support requirements for eMMC?
The eMMC 4.41 standard provides security, speed, and reliability, such as the ability to remove security or high-level interruptions. These features need to support the software from the system file, otherwise the application can not reach the storage through the file system. To switch to eMMC, it is important to ensure software support from both internal and external sources.