Hello Ron, what did you mean with "keyed entry"?
Maybe you have a link or a instruction for this? Thank you! Am Freitag, 13. November 2015 16:29:59 UTC+1 schrieb Ron B.: > > You definitely need a supply that can generate enough current to have a > decent ramp-up of 5V or the PMIC gets angry. But, there's also the issue > of u-boot stopping if it sees a "phantom character" from the UART. So, if > you need high reliability start-up you should rebuild u-boot for "keyed > entry" as well. > > -Ron > > > On Tuesday, November 10, 2015 at 1:29:40 PM UTC-6, Fohnbit wrote: >> >> I forgot: >> >> I power up the power supply ... So not only connected the BBB on the >> Running power supply. >> >> Trank you >> >> Am Dienstag, 10. November 2015 18:58:40 UTC+1 schrieb Wulf Man: >> > rise time spec >> > >> > 1000ms setup 50ms rise time >> > >> > maybe gerald can give his thumbs up on that spec >> > >> > >> > >> > seems fast enough can you put a scope on it to be sure ? >> > >> > maybe the power supply is out of spec some of the time >> > >> > >> > >> > i have been using a cheap 5 dollar chinese supply for 2 years >> with >> > no issues >> > >> > >> > >> > On 11/10/2015 10:30 AM, Fohnbit wrote: >> > >> > >> > >> > >> > Hello, >> > >> > >> > >> > I use this: >> > >> > http://www.meanwell.com/webapp/product/search.aspx?prod=dr-15 >> > >> > >> > >> > DR-15-5 >> > >> > >> > >> > Am Montag, 9. November 2015 16:23:14 UTC+1 schrieb Wulf Man: >> > >> > >> > >> > >> > As posted here a few times. >> > >> > If your power supply does not have a fast enough rise >> time >> > getting up to voltage >> > >> > your BBB will not boot reliable. >> > >> > You have not said what specs your power supply is or >> where >> > you got it from. >> > >> > >> > >> > >> > >> > >> > >> > On 11/9/2015 8:02 AM, Fohnbit wrote: >> > >> > >> > >> > >> > Hello! >> > >> > >> > >> > Sometimes my BBB Rev C dont boot, when I connect the >> 5V. >> > >> > The Power LED is on but the 4 USR LED are off. >> > >> > >> > >> > This happen not really often ... So I have no debug >> > information. >> > >> > >> > >> > But maybe someone has the same problem and know where >> > the problem is? >> > >> > >> > >> > Thank you! >> > >> > >> > -- >> > >> > 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]. >> >> > >> > For more options, visit >> https://groups.google.com/d/optout. >> > >> > >> > >> > >> > >> > >> > >> > -- >> > >> > 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]. >> > >> > For more options, visit https://groups.google.com/d/optout. >> >> -- 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]. For more options, visit https://groups.google.com/d/optout.
