1. Home
  2. Embedded Programming
  3. eMMC CSD Register ECC field

eMMC CSD Register ECC field

Anyone here knowledgeable about eMMC memory?

I have a high reliability application where there is concern about memory corruption. What would happen if I changed the ECC field in the eMMC's Card Specific Data (CSD) register from the default no ECC to the optional BCH(542,512) encoding? Would I still be able to write/read new values to the eMMC normally with the eMMC internally protecting the contents with BCH ECC at the cost of reduced memory capacity, or would a special driver on the host be needed to encode/decode ECC reads/writes?

I've asked around and haven't found a definitive answer so far. Let me know if you can help ... Buzz

Reply to
Buzz McCool
Loading thread data ...

Asked around? Why not consult the standard? From there I gather that eMMC devices may implement internal ECC (that is why the DEVICE_ECC_ FAILED status exists) and that the "ECC" configuration field may be used for external ECC. If nonzero, your driver should handle the ECC encoding/decoding.

--
(remove the obvious prefix to reply directly)
Reply to
Boudewijn Dijkstra

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.