They are identical actions. Same result. Using reset is easier than waiting on the voltage. The desired action is after voltage. Reset gives you a signal that is easy to use in order to complete the desired function. This is not a "bug".
This is about DRIVING INTO these pins form external circuitry. It is not about setting up SW to prevent damage from the condition. The processor i sin reset and unable to do anything with the pins until after reset. There is no DANGER if you do either of these method. Gerald On Thu, Oct 16, 2014 at 3:17 PM, Britton Kerin <[email protected]> wrote: > The SRM contains the following conflicting information: > > The System Reference Manual (SRM) says you're supposed to gate all GPIO > (and other inputs) such that they aren't driven until either the SYS_RESET > line goes high (according to SRM section 7.1, 8.0, and possibly others) or > until the VDD_3V3B rail is up (according to SRM 8.6.2). Are these > conditions > identical in practice? If not which is the right one? > > Also, the reference manual section 8.3.1 says this: > > If you plan to use any of these signals, then on power up, these pins > should not be driven. If you do, it can affect the boot mode of the > processor and could keep the processor from booting or working > correctly. > > while not wrong this paragraph is going to create a dangerous wrong > impression > for most readers: that the boot pins are special and are the ones you have > to > worry about driving early. I think it would be good to change this > paragraph > or add a pointer to the other warnings that apply to all pins or something. > > Britton > > -- > 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.
