Thanks On Wednesday, November 12, 2014 1:18:37 PM UTC-8, Gerald wrote: > > When had issues with noise when the pin was tied low and no cable > attached. Pulling hi solved that issue. > > Gerald > > On Wednesday, November 12, 2014, Keith Brodie <[email protected] > <javascript:>> wrote: > >> Hello All, >> >> On the BBB Rev C schematic the tri-state buffer for UART0, U15, is >> wired with a pull-down for the 1A input (pin 2 on the device). For TTL >> level serial I/O, the high state is idle and ground is the start bit. So >> it seems to me the pin should have been pulled-up, not down, so that the >> input looks idle on start-up. What am I missing? >> >> The reason I ask is I have BBB's mysteriously while performing a >> 'reboot' (no power cycle). When I attach a UART0 console to track it down >> the problem seems to go away, which makes me wonder if it isn't the UART >> itself. >> >> Thanks >> Keith >> >> -- >> 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. >> > > > -- > Gerald > > [email protected] <javascript:> > http://beagleboard.org/ > http://circuitco.com/support/ > >
-- 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.
