From: Rico <[email protected]> Reply-To: "[email protected]" <[email protected]> Date: Wednesday, August 6, 2014 at 3:34 PM To: "[email protected]" <[email protected]> Subject: [beagleboard] Re: Beaglebone sometimes doesn't start after a power loss
> Sorry to push... Gerald, maybe you have an idea? > > > On Sunday, 3 August 2014 15:28:45 UTC+2, Rico wrote: >> Hello, >> >> I've noticed that the beaglebone black sometimes does not startup after a >> short power loss, even when pressing the power button, it does not start. >> >> To reproduce with a regulated power supply (tested with BBB rev B and C): >> >> 1) Output of power supply 5V >> 2) connect power supply to BBB >> 3) BBB starts up normally >> 4) down-regulate the output slowly >> 5) at 3.5 V, the beaglebone turns off >> 6) go back to 5V >> 7) press the power button, the beaglebone won't startup >> 8) go above 5.1V and press the power button => now the beaglebone starts Are you measuring the voltage at the BBB terminals or are you reading the voltage from your power supply? Do you use thin wires to connect from your power supply to the BBB? My thinking is there is a voltage drop across the wires of 100mV or more. Regards, John >> >> I've read the datasheet of the PMIC (TPS65217C) but I cannot find out why the >> BBB starts at 5.1V but not at 5V, has anyone an idea? >> >> Many thanks, >> Rico >> > > -- > 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.
