Editing MultiMediaCard (section)

=== eMMC ===
[[File:Samsung Galaxy Tab 2 10.1 - Samsung KLMAG2GE4A-A002-3955.jpg|thumb|eMMC KLMAG2GE4A-A002 inside the [[Samsung Galaxy Tab 2 10.1]]]]

The currently implemented '''embedded MMC'''<ref>{{cite web |title=What is eMMC Memory – software support – Reliance Nitro |url=http://www.datalight.com/solutions/technologies/emmc/what-is-emmc |website=datalight.com}}</ref> ('''eMMC''' or '''{{notatypo|e.MMC}}''') architecture puts the MMC components (flash memory, buffer and controller) into a small [[ball grid array]] (BGA) IC package for use in circuit boards as an embedded non-volatile memory system. This is noticeably different from other versions of MMC as this is not a user-removable card, but rather a permanent attachment to the [[printed circuit board]] (PCB). Therefore, in the event of an issue with either the memory or its controller, the eMMC would need to be replaced or repaired. In eMMC, the host system simply reads and writes data to and from the [[Logical block addressing|logical block addresses]]. The eMMC controller hardware and firmware lifts the burden on the host system by performing error correction and data management. eMMC exists in 100, 153, and 169 ball packages and is based on an 8-bit parallel interface.<ref>{{cite web |url=https://www.hyperstone.com/en/Registration-Hyperstone-1125.html |url-access=registration |title=Flash Memory Form Factors |author=<!--Not stated--> |series=The Fundamentals of Reliable Flash Storage |publisher=Hyperstone GmbH |access-date=19 April 2018}}</ref>

Almost all mobile phones and tablets used this form of flash for main storage until 2016, when [[Universal Flash Storage]] (UFS) started to take control of the market. However, as of 2023, eMMC is still used in many consumer applications, including lower-end smartphones, such that [[Kioxia]] has introduced new 64&nbsp;GB and 128&nbsp;GB eMMC 5.1 modules based on modern [[3D NAND]] flash scheduled for mass production in 2024.<ref>{{Cite web |date=2023-09-27 |title=KIOXIA Introduces Next Generation e-MMC Ver. 5.1-Compliant Embedded Flash Memory Products |url=https://www.businesswire.com/news/home/20230927535891/en/KIOXIA-Introduces-Next-Generation-e-MMC-Ver.-5.1-Compliant-Embedded-Flash-Memory-Products |access-date=2023-09-28 |website=www.businesswire.com |language=en}}</ref><ref>{{Cite web |last=Shilov |first=Anton |title=eMMC Destined to Live a Bit Longer: KIOXIA Releases New Generation of eMMC Modules |url=https://www.anandtech.com/show/21074/emmc-to-live-a-bit-longer-kioxia-releases-new-emmc-products |access-date=2023-09-28 |website=www.anandtech.com}}</ref> 

eMMC does not support the [[Serial Peripheral Interface|SPI-bus]] protocol and uses NAND flash.<ref>{{Cite web |date=6 September 2016 |title=NAND and eMMC: All You Need to Know About Flash Memory |url=https://www.makeuseof.com/tag/nand-emmc-need-know-flash-memory/}}</ref>
{| class="wikitable"
|+ eMMC versions
! Version
! Sequential read (MB/s)
! Sequential write (MB/s)
! Random read (IO/s)
! Random write (IO/s)
! Clock frequency (MHz)
! Used in
|-
! 4.3
|
|
|
|
|
|
|-
! 4.4
|
|
|
|
|
|
|-
! 4.41
|
|
|
|
| 52<ref>{{Cite web |last1=Moon |first1=Yejin |date=2014-03-20 |orig-date=Presented in November 2011 |title=Q4.11: Introduction to eMMC |url=https://www.slideshare.net/linaroorg/intro-to-emmc}}</ref>
|
|-
! 4.5
| 140<ref>{{Cite web |title=eMMC to UFS: How NAND Memory for Mobile Products Is Evolving |url=https://news.samsung.com/global/emmc-to-ufs-how-nand-memory-for-mobile-products-is-evolving |access-date=2021-02-16 |website=news.samsung.com |language=en}}</ref>
| 50
| 7000
| 2000
| 200
| [[Snapdragon 800]]
|-
! 5.0
| 250
| 90
| 7000
| 13000
|
| Snapdragon 801
|-
! 5.1
| 250
| 125
| 11000
| 13000
|
| Snapdragon 820
|} <!--does repair mean replacing the emmc itself?-->