Raspberry Pi Zero – Pad probing

The pads on the reverse of the Raspberry Pi Zero look interesting to me.

Raspberry Pi Zero - SD Breakout / Test Pads

So far I’ve checked where these pads are connected.

PP Description
PP1 USB +5V Input
PP6 GND
PP8 3.3V
PP14 SD CLK
PP15 SD CMD
PP16 SD DAT0
PP17 SD DAT1
PP18 SD DAT2
PP19 SD CD
PP22 USB D+
PP23 USB D-

26 comments for “Raspberry Pi Zero – Pad probing

  1. 2015/12/23 at 15:11

    Hi,
    thanks for the data! I think that the PP3 is also GND, am I right?

    There is no official data sheet for this?

  2. 2015/12/23 at 15:55

    Last comment: I’m making a comparison between B+ and Zero, they seems pretty similar, apart PP22 and PP23

    https://docs.google.com/spreadsheets/d/15kHcow993d_2CS6rZxQMq0wAWlgWNaHU_go1Hyf08ck/edit?usp=sharing

    • Chris
      2015/12/30 at 21:03

      Thanks for the SS link, they do look very similar :).

      • kidpixo
        2016/01/13 at 09:25

        You are welcome 😀

        • kidpixo
          2016/01/13 at 09:37

          FYI : the SS is open to modification to anyone now (I know, it could be really bad) , if you have any update please contribute!

          • Nick
            2016/09/05 at 15:15

            Thanks for sharing (now I understand Google sharing too).

            Your PiZero Pads document enabled me to hardwire LiPo and Adafruit Boost board to Pi Zero with Camera and Pimoroni EnviroPhat for motion sensitive life-logging.

  3. 2016/01/10 at 18:41

    Just my two cents :
    A Hi-res photo of the back to be annotated (18,2Mo)
    http://stuff.knackes.com/dld/201601/Pi0-Back-HR_6614042F.png

    And the same with the power, TX and RX pads marked (2,4Mo)
    http://stuff.knackes.com/dld/201601/Pi0-Pads_7839BF41.jpg

    Any idea about what the J5 Footprint is ? I marked the two grounds on it in the second picture.

    • Chris
      2016/01/17 at 14:19

      I’d assume J5 is the VideoCore JTAG socket as with other recent models.

  4. aeron
    2016/03/06 at 03:14

    thanks so much

  5. batt3r3d
    2016/04/15 at 17:43

    hi,

    where can i find the “micro sd-card pin out adapter” on the first picture.. ??

    thanks in advance

    • Chris
      2016/04/23 at 22:57

      I designed the micro usb adapter a while ago, I haven’t seen them available anywhere commercially.

      • Tanner
        2016/06/21 at 14:59

        Would you consider sharing the PCB files? I could really do with something like that!!

        • Chris
          2016/09/09 at 10:30

          Sadly not as it was just tagged onto another PCB which used 0.6mm PCB where I had space.

  6. open
    2016/04/23 at 15:14

    Do you know if you use PP22 and PP23, does it cancel out the usb already soldered to the board?

    Thanks in advance

    • Chris
      2016/04/23 at 22:59

      Not sure what you mean by cancel out, but you can use one of the other, If you solder/connect to the pads you can’t use the “USB” micro usb port otherwise it’s going to conflict.

  7. Jeph Diel
    2016/09/01 at 13:22

    Hello, this is awesome and will really help me in a project, but one question, If I wire up to pp22 and pp23 for OTG, how do I switch it into OTG mode? Is there a way to do this in software? Does the pi do OTG by default?

    • Chris
      2016/09/09 at 10:29

      When you’re using dwc2 it will switch as it needs to automagically.

  8. ben
    2016/10/11 at 01:19

    Could pp37 and 38 be modified into audio outs from the HDMI? Could it be that easy to add a mono speaker? I have no idea how to test this without making a mess

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