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Raspberry Pi Forum RPi rev 2.0 explained
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Related

RPi rev 2.0 explained

Former Member
Former Member over 13 years ago

Eben has a front-page story up explaining rev 2.0.

It does fix the 1.8V problem, although no credit where

credit is due to Jamodio or any of the others here for

finding, characterizing, and reporting the problem.

 

No mention that I can see of FCC/CE residential

certification.  I assume the needed minor pcb changes

were made, but perhaps certification has not been

done yet.

 

http://www.raspberrypi.org/archives/1929

 

p.s.

   hopefully element14 will explain to their customers

how to be sure to get rev 2.0 when ordering.

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  • jamodio
    jamodio over 13 years ago

    Another hires picture of the Rev2 board.

     

    Glad to see that the voltage regulators are from ON Semi and not the cheap chinese knock off, one of which I found had a huge drift in function of temperature.

     

    P2 does not seem to be populated on this revision.

     

    P5 location is kind of ugly, but better than nothing. Audio jack is blue instead of black.

     

    image

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  • wallarug
    wallarug over 13 years ago in reply to jamodio

    Where is P6 that this article talks about: http://www.tweaktown.com/news/25700/raspberry_pi_revision_2_0_boards_announced/index.html

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  • wallarug
    wallarug over 13 years ago in reply to jamodio

    Where is P6 that this article talks about: http://www.tweaktown.com/news/25700/raspberry_pi_revision_2_0_boards_announced/index.html

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  • Former Member
    Former Member over 13 years ago in reply to wallarug

    P6 is the un-populated 2 pin one between RG2 and the HDMI connector.

     

    Anyone see a P4 ?

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  • wallarug
    wallarug over 13 years ago in reply to Former Member

    selsinork wrote:

     

    P6 is the un-populated 2 pin one between RG2 and the HDMI connector.

     

    Anyone see a P4 ?

    That makes sense now.  Thank you.

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  • jamodio
    jamodio over 13 years ago in reply to wallarug

    It is right next to the 3.3V regulator, probably is the header for the reset button.

     

    -J

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  • johnbeetem
    johnbeetem over 13 years ago in reply to Former Member

    selsinork wrote:

     

    Anyone see a P4 ?

    P4 is the Ethernet jack.  Silkscreen label is under it.  Use your X-ray vision or look at photo of unpop'd board or the schematics.  Yes, P4 is an inconsistent name since RasPi generally uses "P" for plugs and "S" for sockets.  Maybe they used "P" because the preferred vendor was Pulse Engineering... "OK, you explain it then" [Eddie Izzard].

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  • Former Member
    Former Member over 13 years ago in reply to johnbeetem

    P4 is the Ethernet jack.  Silkscreen label is under it.  Use your X-ray vision or look at photo of unpop'd board or the schematics.

    You're right - I just happen to have one here that I've removed most of the connectors from...

     

    Nice pic of the back on the skpang blog here http://www.skpang.co.uk/blog/archives/701 I see that there's an extra lump of copper underneath the lan9512 as well.

     

    Certainly appears that these ones go over a wave on a carrier - you can clearly see the outline in the flux residue.

     

    Slightly concerning that D10 & D11 appear to have vanished - that's likely to scupper my plans to add an AP1212 usb switch.  Schematics would be nice...

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  • johnbeetem
    johnbeetem over 13 years ago in reply to Former Member

    selsinork wrote:

     

    Nice pic of the back on the skpang blog here http://www.skpang.co.uk/blog/archives/701 I see that there's an extra lump of copper underneath the lan9512 as well.

    Yes, that's a nice picture.  I see that the P5 label is on the back side, not the front.

     

    The extra copper under the LAN9512 should help with radiating heat or conducting it using a thermal pad.  I'm glad they finally acknowledged that the LAN9512 presents thermal challenges.

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  • wallarug
    wallarug over 13 years ago in reply to Former Member

    On the new P5 header, is there a second PWM channel that I can used?  The first one is on Pins 3 and Pin 5...right?

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