1. gaseoso

    OP gaseoso Member
    Newcomer

    Joined:
    Sep 17, 2015
    Messages:
    47
    Country:
    Chile
    Hello, peeps. I've been looking around Google, and also this forum, but I haven't found anything regarding the specifications/pinout of the O3DS SD card reader.

    I was looking around for a spare SD card reader for modding purposes, and I remembered I have this destroyed O3DS laying around, and I thought I could use that, so I desoldered it. The problem is that the card reader has 13 pins, and I cannot find any information regarding it. As far as I can tell, it's just a normal SD reader, but I need to know if there are some specifics to it. Here's a pic of what I think the pinout is (relative to the SD card's pins), going by simple observation:

    [​IMG]

    Anyone knows if this is correct? Can anybody shed some light into the specs of this? Also, what are the last 2 pins for?
     
    Last edited: Mar 17, 2017
  2. proflayton123

    proflayton123 Sakura思い
    Member

    Joined:
    Jan 11, 2016
    Messages:
    6,023
    Country:
    Japan
  3. gamesquest1

    gamesquest1 Nabnut
    Moderator

    Joined:
    Sep 23, 2013
    Messages:
    14,918
    the write protect pins I would imagine
     
  4. gaseoso

    OP gaseoso Member
    Newcomer

    Joined:
    Sep 17, 2015
    Messages:
    47
    Country:
    Chile
    I noticed that the right-most pin seems to be the "sense" pin (the one that notices if the card is inserted). I'm still in the blank regarding the 2nd right-most pin, and I don't want to destroy the reader just to find out lol.

    EDIT: You were right. After some experimenting, I came up with the following:

    [​IMG]

    The two pins I labelled as "s" are write-protection pins. Inserting a card with the tab set to "locked", causes the copper thingy at the right side not to touch the top part, whereas unlocked, it does.

    Thanks for your input!
     
    Last edited: Mar 17, 2017
  5. snam11

    snam11 GBAtemp Regular
    Member

    Joined:
    Jan 10, 2007
    Messages:
    108
    Country:
    United States
  6. gaseoso

    OP gaseoso Member
    Newcomer

    Joined:
    Sep 17, 2015
    Messages:
    47
    Country:
    Chile
    @snam11 I'm not sure what you're asking, but in case you want to know, the pins you labeled in that picture (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13) correspond to 9, 1, 2, 3, 3, 4, 5, 6, 6, 7, 8, s, s respectively. Pins 3 and 6 are ground and appear two times each for some reason. s pins (12 and 13 in your picture) are the "sense" pins which tell the SD card reader if the card is set to "Locked". Inserting a locked SD card will make those pins never touch each other, while an unlocked one makes them touch.

    The rest of the pins are just normal SD card pins per the standart:
    9 - DAT2 (N/C)
    1 - DAT3 (CS#)
    2 - CMD (MOSI)
    3 - GND
    4 - VDD
    5 - CLK (SCK)
    6 - GND
    7 - DAT0 (MISO)
    8 - DAT1 (IRQ)
     
  7. snam11

    snam11 GBAtemp Regular
    Member

    Joined:
    Jan 10, 2007
    Messages:
    108
    Country:
    United States
    i know the pinout of the sd card on the pcb, but i need the pinout of the pcb connector that is plugged on the 3ds motherboard:
    because i suppose mine is broken (of course the sd card doesn't work on 3ds if connected).

    https://gbatemp.net/attachments/sd-pinout-jpg.188043/

    as you can see in the picture there i've mapped the pinout (20 pin pcb connector), but i'm not sure is ok. can you test yours so i can compare?
    Thanx
     
    Last edited: Dec 15, 2019
  8. gaseoso

    OP gaseoso Member
    Newcomer

    Joined:
    Sep 17, 2015
    Messages:
    47
    Country:
    Chile
    No, I can't. I got rid of this reader and 3DS years ago.
     
Draft saved Draft deleted
Loading...

Hide similar threads Similar threads with keywords - specifications, [Solved], reader