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Need a SD (memory card) controller chip.

Discussion in 'Electronic Design' started by Boki, Dec 6, 2006.

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  1. Boki

    Boki Guest

    Hi All,

    I need a SD memory card controller chip, I also need to porting some
    MCU code, and need UART interface, low speed as 9.6K is enough.

    Best regards,
  2. Marc Ramsey

    Marc Ramsey Guest

    Do you mean something like this?

  3. Boki

    Boki Guest

    Boki ¼g¹D¡G

    Dear All,

    Due to the cost, I hope it only support SD ( no need to suppor others,
    ex: CF, MMC,...).

    Best reagrds,
  4. Nevo

    Nevo Guest

    SD cards must support the SPI interface. So any microcontroller with a built
    in SPI interface can control an SD card.

    You can download the MMC card spec from SanDisk to get the details.
  5. PeteS

    PeteS Guest

    The MMC spec is not the same as the SD spec, unfortunately. One can get
    a copy of the minimal SD spec for free but not the whole spec without
    joining the club. The entire spec is necessary to fully implement SD.

    I am using a device from Winbond that supports SD and SDIO, but I had
    to sign NDAs to get the source. I have no doubt you will run into the
    same issue.


  6. Have a look at

    and related:


    Adrian Jansen adrianjansen at internode dot on dot net
    Design Engineer J & K Micro Systems
    Microcomputer solutions for industrial control
    Note reply address is invalid, convert address above to machine form.
  7. Kryten

    Kryten Guest

    I heard that:
    1. SD is a superset of MMC, thus MMC code can use SD cards
    2. The 4-bit SD interface isn't a big deal
    3. Only the 'secure' aspects are closely guarded
    4. The security has been cracked, so it isn't secure
    5. Almost nobody uses the security features

    So I presume one can get code to use SD cards without the complete
  8. Boki

    Boki Guest

    PeteS ¼g¹D¡G
    Thanks a lot, I think NDA is not an issue. :)

    Best regards,
  9. werty

    werty Guest

    I dont think he will run into the same issues , nor will i .

    The market will be free , or it will die , take your pick ....

    Patents hold society hostage by those who only copyied
    others , but got to patent office first !
    Can You say Bill Gates !
  10. Joe Birch

    Joe Birch Guest

    Did you find an SD Card Host controller?
    I am looking for one and could use some help.
    The dosonchip looks interesting but i think would be too slow.
    I need a concurrent write of 1Mbytes/s and a read of 2Mbytes/s.

    A USB to SD card bridge would be OK. or a SD Card Host controller with
    a A/D bus.

    I need to keep the cost <$10

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