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  • Author Author: pchan
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Raspberry Pi 3 Model B GPIO 40 Pin Block Pinout

Graphic showing the GPIO pin breakout on the Raspberry Pi 3 Model B.

 

If you're looking for the new Raspberry Pi 3 Model B+ then you can find that here: Raspberry Pi 3 Model B+ GPIO 40 Pin Block & PoE Header Pinout

                                                                                                             
NEW! Raspberry Pi 3 Model B
Frequently Asked Questions Comparison Chart Technical Specifications
Unboxing Video Pi3 Video Arcade Project
pchan
  • in reply to shabaz

    Two and a half decades ago, I wrote a program called "chipmunk" that allows you to examine memory mapped registers on a live linux system. It would be easy to check some things.

     

    Anyway, for a quick overview:

     

    tree:/proc> cat iomem

    00000000-3affffff : System RAM

      00008000-0078959f : Kernel code

      007fa000-0093f79b : Kernel data

    3f006000-3f006fff : dwc_otg

    3f007000-3f007eff : /soc/dma@7e007000

    3f00b840-3f00b84e : /soc/vchiq

    3f00b880-3f00b8bf : /soc/mailbox@7e00b800

    3f200000-3f2000b3 : /soc/gpio@7e200000

    3f201000-3f201fff : /soc/uart@7e201000

      3f201000-3f201fff : uart-pl011

    3f202000-3f2020ff : /soc/sdhost@7e202000

    3f215040-3f21507f : serial

    3f300000-3f3000ff : /soc/mmc@7e300000

    3f980000-3f98ffff : dwc_otg

    tree:/proc>

    My RPI-2 is not currently "on", so I can't compare it right now.

     

    However, I WOULD expect it to be the same.

     

    As I understand things, RPI foundation has asked Broadcom for a more powerful processor, (of course with some inside knowledge that they already had experience with the A53, Wifi etc.) and apparently the RPI market is big enough for Broadcom to do a chip just for raspberry pi. Then it makes sense to start out with a BCM2836 and change only what's needed. Keep as much as possible the same.

  • in reply to Problemchild

    Hi!

    No idea to be honest, it wouldn't be surprising if it has changed again. RPF don't mention these things on day 1 (to prevent people asking awkward questions that conflict with the 'backwards compatible' messaging to the public) but someone will eventually 'document' it - on their forum buried in a discussion thread I'm sure. User manuals and datasheets are old-school  : )

  • in reply to mconners

    True Michael it's really the minimum to get it going .. Problem here is since this is a new and I belive custom SOC for the RPI then the documentation is probably not forthcoming any time soon. Therefore everything could easily be totally different from the Pi2 or the same how is any one to know. Open sourcing the PCB only gives you a taste especially when t he SOC where the complexity lies is largely a black box

  • in reply to shabaz

    Agreed, did they say that  there is a new GPIO memory map now we have a new SOC or have they kept it the same or none of the above??

    This will be important if the puplic expect the H/W that gets plugged in to work ????

  • in reply to shabaz

    > We should highlight the lack of specs/support/community spirit from RPF/BCM if we believe it not present.

     

    To that end:

     

    https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=138215&e=0