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. >>>>> >>>>> [image: ASSET_BOT.PNG] >>>>> >>>>> >>>>> 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 > <https://groups.google.com/d/msgid/beagleboard/cffa21c9-e418-4786-9fe6-6c90f69660b3o%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > -- > 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 > <https://groups.google.com/d/msgid/beagleboard/2E7C4DC0-3F8D-4CF1-A3C1-2E92513F5ED8%40gmail.com?utm_medium=email&utm_source=footer> > . > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, 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.
