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]> 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] > <javascript:_e(%7B%7D,'cvml','beagleboard%[email protected]');> > . > For more options, visit https://groups.google.com/d/optout. > -- Gerald [email protected] 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.
