EMMC

Contents [hide]

• What tools you will need
  • Flow chart of order of operations
  • Related Topics
  • Further reading

Background information

Embedded Multimedia Card(EMMC) is a standard Multimedia Card(MMC)Like a SD card, that used NAND style chips, but it has an integrated memory controller that makes the storage capable of booting an OS on itself.
EMMC standard pinout
1. GND,
2. CMD,
3. CLK,
4. DAT0,
5. VCC 3.3V,
6. VCCQ 1.8V

Difference between NAND style chips and EMMC

• Unlike NAND style chips EMMC has an integrated or embedded memory controller which makes it a bootable device unlike a standard NAND style chip, However it does like a Flash translation layer(FTL).


• EMMC is typically less complex and less expensive due to the fact it has an integrated memory controller were as typical NAND style chips do not, this also induces a great benefit of EMMC but also a big weakness.
  As the memory controller is integrated there is less chance of external wires breaking causing the chip not to work, however if the memory controller itself breaks it is typically more difficult and expensive to repair,
  and retrieve the data on the EMMC chip, unlike NAND style chips where the memory controller is located externally

Flow chart of order of operations

Insert a flow chart of steps and actions for each task (create using diagram)

Related Topics

Topics such as desoldering to chip off or firmware dumping for disk PCB repairs

• NAND flash
• Related Topic 2

Further reading

External references in wiki references can just be cited through the keyword link

1. Reference 1: what’s NorFlash, NandFlash and eMMC ?
2. Reference 2: Source details