Thanks. And just to verify my second question: When SYS_RESETn is high but the GPIOs are not multiplexed since the firmware is not fully started: is it allowed to have a HIGH-signal on a GPIO pint that is not already programmed as input?
On Thu, Dec 26, 2013 at 4:51 PM, Gerald Coley <ger...@beagleboard.org> wrote: > The reset line is roughly 10mA. When it is LOW, do not connect any signal to > the pins. No voltage of any kind can be driven into the pins until reset > goes high. > > Gerald > > > On Mon, Dec 23, 2013 at 6:05 AM, Satz Klauer <satzkla...@googlemail.com> > wrote: >> >> >> Hi, >> >> just to verify some things before I order design of my capes: according to >> http://elinux.org/Beagleboard:BeagleBoneBlack#Expansion_Header_Usage it is >> not allowed to have an input signal on any of the GPIO-pins during power-up >> or during boot. Resulting from that I think about using SYS_RESETn as signal >> to enable my capes. So my question: >> >> - which current can be pulled out ot SYS_RESETn / how much GPIO-inputs can >> I drive with this signal? >> >> - when SYS_RESETn is HIGH the GPIOs may not be programmed as input >> (because firmware is not fully started at this point) but the Cape-hardware >> possibly sets an input signal to them (because SYS_RESETn already enabled >> it). Is this a problem? Can I use SYS_RESETn to enable input signals too or >> should I use an additional GPIO as output which enables such signals much >> later than SYS_RESETn would do that? >> >> Thanks for clarification! >> >> -- >> 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/groups/opt_out. > > > -- > 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/aLQo68EGT68/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/groups/opt_out. -- 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/groups/opt_out.
