Serge, I was talking about the pin driver circuit inside the package (something like this <http://i.stack.imgur.com/f3Dz6.png>) not an external connection to 3.3V or ground, but I totally agree for external connections. Always make sure the current in and out of the pin, in any oops type configuration, will be limited to what the pin can handle.
On Wed, Jul 30, 2014 at 10:37 PM, <serge.ns...@gmail.com> wrote: > > > On Thursday, July 31, 2014 12:39:42 AM UTC+6, Brandon I wrote: >> >> The gpio are push pull/pseudo open drain, so there's a transistor/switch >> going from 3.3V to the pin,... >> >> > At boot time the respective Sitara pins become outputs high/low level as > needed. > Then, please never assume your GPIO is tri-state. > > > In theory you may connect 3.3v power line direct to the pin if: > 1) you are sure it is not used at boot time as the output > 2) it is 3.3v domain power related pin. > > Feel free to ground the pin if: > 1) you are sure it is never used at boot time as an output, and you never > drive it High. > > > To live safe and feel happy always add pulling resistors, never connect > pin to the VCC or GND dorectly. > > -- > 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/cWGCEtg9syY/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > beagleboard+unsubscr...@googlegroups.com. > 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
