On 7/14/14, 1:56 PM, "Łukasz Przeniosło" <[email protected]> wrote:
>Hello there, >I am in front of a bigger hardware design and while ive been thinking of >it i have run into some considerations. I was hoping i could get some >ansfers from more exporienced people. > >From my expirience with bbb i know that power can be sequenced correctly >usong power button- press it to power the board and press it to start >shutdown sequence. The problem is that afaik the only hardware power >designator is one pf the blue diodes and that diode pin is not accesible >on the headers. > >I need some kind of indikator that would hold the relay on on the >machine. I cant wait ie. 10 seconds with my finger on the machines button >to wait for bbb to boot and start some user program that would pull a >gpio to power the relays coil (lets say that user powers the power relay >usong a button). > >Have any of you been throigh this kind of designs? I am trying to get the >same functionality as generic motherboards have with their power buttons. >I know i can add an external mcu for power management but i want to keep >it parts suffitient. >Any help would be really aprichiated. I'm not sure what you are asking, but the 3V3B pin is the last voltage rail to turn on. This would indicate that the power on the board is now stable. Regards, John > >-- >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.
