Rpi3 Solder Pads

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Robots86
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Rpi3 Solder Pads

Post by Robots86 » Tue Jul 05, 2016 1:15 am

Hi sudomod

Im struggling to locate information on the solder pads on the back of the pi 3. Does anyone have a link?
I need to know the usual 5v, g, d+, d- etc. Also theres some pads located opposite side of the usb ports and i was wondering if they are an alternative for usb connections?

Thanks

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Re: Rpi3 Solder Pads

Post by Robots86 » Tue Jul 05, 2016 7:34 am

I have found this list for an older model but not sure how accurate it is for the pi 3... Also i cant see D+/D- USB? I dont want to have to go with trial and error and end up frying my pi :mrgreen: Help Please :mrgreen:

PP1 5V from micro-USB
PP2 5V from micro-USB
PP3 GND
PP4 GND
PP5 GND
PP6 GND
PP7 5V after polyfuse
PP8 3V3
PP9 1V8
PP10 Goes from 3V3 to 2V on brownout
PP11 DAC_2V5 (for composite video DAC)
PP12 AUD_2V5 (for PWM audio drivers)
PP13 Goes from 3V3 to 2V on ACT activity
PP14 SD_CLK
PP15 SD_CMD
PP16 SD_DAT0
PP17 SD_DAT1
PP18 SD_DAT2
PP19 SD_DAT13
PP20 H5V
PP21 RUN signal (reset)
PP22 Goes from 3V3 to 2V on activity of green (link) ethernet jack LED
PP23 Goes from 3V3 to 2V on activity of yellow (speed) ethernet jack LED
PP24 COMPVID
PP25 AUDIO_L
PP26 AUDI_R
PP27 VBUS (USB 5V power)
PP28 ETH_CLK (25.000 MHz)
PP29 VC_TMS
PP30 VC_TRST_N
PP31 VC_CLK
PP32 VC_TDI
PP33 VC_TDO
PP34 GND
PP35 GPIO6 of LAN9514
PP36 GPIO7 of LAN9514
PP37 CAM_GPIO0
PP38 CAM_GPIO1
PP39 SCL0
PP40 SDA0

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Re: Rpi3 Solder Pads

Post by Robots86 » Thu Jul 07, 2016 1:08 am

Still need help with this if anyone has the knowledge :mrgreen:

Thanks

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Re: Rpi3 Solder Pads

Post by chiz » Thu Jul 07, 2016 1:24 am

Personally, I use a multimeter to trace the pads where they lead to. Then use references to confirm my findings.

I recall tracing the USB port connections going to the chipset (chip marked with "SMSC"). I had to trace them first before cutting my Pi to ensure I don't cut the traces and still be able to use the USB solder pads. The underside of the board leads to this chipset as this side is where the USB ports are soldered to. Judging from a picture of the Pi3 I taken it appears that the following pads are USB D-/D+ pairs:

USB ports beside the Ethernet jack:
PP36 and PP41
PP42 and PP43

USB ports near the edge of the board:
PP44 and PP45
PP46 and PP47

But don't take my word for it -- trace, trace and trace. Did I say trace?

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Re: Rpi3 Solder Pads

Post by Robots86 » Thu Jul 07, 2016 1:35 am

Thanks chiz i will get tracing then :mrgreen:

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