Power button has an internal pullup inside the TPS65217C to the DC in rail.You do not need the external pullup.
Gerald On Thu, Jul 17, 2014 at 7:05 AM, Michael Doherty <[email protected]> wrote: > I'm trying to use an external button to control power on/off on BBB. I > currently have a momentary button wired to pwr_btn and pulled up high via > 3.3V pin. The issue is that 3.3v is not enabled by default in sleep mode. I > have no problem pressing the button to pull ground and shut down the > beaglebone, but then when it goes to sleep, 3.3v (LDO2) rail shuts off > which pulls the pwr_but ground which then immediately triggers power on > again. > > How would I enable LDO2 in sleep mode? I read through the user guild ( > http://www.ti.com/lit/ds/symlink/tps65217c.pdf) and couldn't find any > answers. > > -- > 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.
