Ok that’s interesting. Thanks for the feedback But if there is no power applied to the VDD_CAPE pins and you connect the USB cable then it will power from USB is that how it behaves?
I don’t want the device to power from usb at all, I only want usb for connecting devices. Sent from my iPhone > On 3 Jul 2020, at 18:39, István Gyürki <[email protected]> wrote: > > > Yes it boots as usual without USB power, I use it as a USB gadget, so I > regularly connect/disconnect the USB-C connector while being powered over the > pins. > It does not reboot, and there's no momentary glitch either, so as long as one > of the two power sources is connected, it runs continuously. > >> On Fri, Jul 3, 2020 at 6:44 PM Adrian Hatton <[email protected]> wrote: >> Does it boot the board as soon as you apply power and without the usb >> connection? >> >> What happens when it is powered up then you connect the USB? >> >> Sent from my iPhone >> >>>> On 3 Jul 2020, at 17:04, [email protected] wrote: >>>> >>> >>> I've not yet removed the diode, but otherwise I'm powering my BBAI using a >>> 5V/3A power supply (from OKdo) through pins P9.1+2/5+6. >>> I read in some topics (like >>> https://groups.google.com/forum/#!topic/beagleboard/Tx9pGjJPZ0A) that one >>> might need a beefier supply or added cap if not powering thru the usb >>> connector, though I'm not sure if this applies to BBAI, too. >>> >>> >>>> On Friday, July 3, 2020 at 5:25:23 PM UTC+2, [email protected] wrote: >>>> I connected pin1 to GND and pin5 for VDD_CAPE >>>> >>>> As pins 5 and 6 are connected on the PCB I did not see it necessary to >>>> connect power to both pins. >>>> >>>> have you successfully self powered one of these boards? >>>> >>>>> On Thursday, 2 July 2020 19:23:24 UTC+1, [email protected] wrote: >>>>> Do you use pins 5&6 (VDD_CAPE_5V) to power the board? >>>>> >>>>>> On Thursday, July 2, 2020 at 7:51:08 PM UTC+2, [email protected] wrote: >>>>>> When i removed D81 power was present on VDD_5V but only at about 4.5V >>>>>> which is I guess the voltage drop across D82. >>>>>> >>>>>> there was no voltage on VDD_3V3 and the device would not startup - even >>>>>> after pressing the power on button. >>>>>> >>>>>> Has anyone solved this? >>>>>> >>>>>>> On Wednesday, 1 July 2020 21:58:00 UTC+1, Adrian Hatton wrote: >>>>>>> I have found D81 from the silk screen data. Will be removing and trying >>>>>>> as a next step. >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>>> On Wednesday, 1 July 2020 21:42:12 UTC+1, Adrian Hatton wrote: >>>>>>>> Hi Geza, >>>>>>>> >>>>>>>> I was wondering if you made any progress here? >>>>>>>> >>>>>>>> I took a look at the schematics myself and I agree that by removing >>>>>>>> D81 you essentially disconnect VDD_TYPE C from VDD_5V. >>>>>>>> >>>>>>>> If you then apply 5v power to VDD_CAPE_5V it connects to VDD_5V >>>>>>>> through D82 and should power the device. >>>>>>>> >>>>>>>> I assume you would then boot the device by connecting PWR_BUT or P9.9 >>>>>>>> to GND. >>>>>>>> >>>>>>>> Have you tried this? Have you been able to locate D81 on the board? I >>>>>>>> have downloaded the board.pdf but it is extremely difficult to find >>>>>>>> specific components. >>>>>>>> >>>>>>>> Many thanks. >>>>>>>> >>>>>>>> >>>>>>>>> On Saturday, 6 June 2020 09:41:45 UTC+1, Geza Kuhmann wrote: >>>>>>>>> Hi All, >>>>>>>>> >>>>>>>>> I'd like to make my BBAI so it could only be powered from the J9.5/6 >>>>>>>>> pins, but not from the USB-C connector. >>>>>>>>> On the other hand, the USB-C connector should stay functional as pure >>>>>>>>> USB connection (using the BBAI as a USB gadget). >>>>>>>>> >>>>>>>>> Reading the schematic it seems to me that removing diode D81 would >>>>>>>>> exactly do this, but not being a hardware expert, I would be glad if >>>>>>>>> somebody could confirm this. >>>>>>>>> >>>>>>>>> Thanks, >>>>>>>>> >>>>>>>>> Geza >>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "BeagleBoard" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/beagleboard/LfBMYl43gxk/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/beagleboard/cffa21c9-e418-4786-9fe6-6c90f69660b3o%40googlegroups.com. >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to a topic in the >> Google Groups "BeagleBoard" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/beagleboard/LfBMYl43gxk/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/2E7C4DC0-3F8D-4CF1-A3C1-2E92513F5ED8%40gmail.com. > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the Google > Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/LfBMYl43gxk/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/CAAkqu5PVfsjNxNyXHt7cL%3DGpkznp1VUxoNR1E%2BAWjFsoOj0xHQ%40mail.gmail.com. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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