I saw that. Gerald
On Mon, Jan 12, 2015 at 7:22 AM, Lawrence Menten <[email protected]> wrote: > I just posted a similar (same?) problem. Funky voltage measurements on > TPs similar or the same as yours. Just tried the system again this AM > after reporting problem to rma just to discover that BBB booted up > perfectly and is now operational again. > > On Monday, November 18, 2013 at 8:00:55 PM UTC-5, James Littlefield wrote: >> >> New to BBB but experienced with embedded systems. >> >> I'm working on a project using the BBB. Supplying +5V (up to 3A) >> directly to the pins on P9 from a quality bench supply. I've found that >> briefly switching the +5V supply OFF and then back on can pretty reliably >> leave the BBB in an odd state characterized by... >> a) No LEDs on >> b) Very little current drawn from supply (10mA or less) >> c) +5 present on P9.5 and P9.6 >> d) 0.687V on P9.7 and P9.8 ( should be SYS_5V ). >> e) P9.9 = 3.57V >> f) P9.10 = 0V >> >> I've found that once the system is in this mode no amount of >> pressing/holding the momentary BBB pushbuttons will get the system working >> again. Removing input power, waiting 10 sec or so, then restoring power >> will get things working again. >> >> Has anyone else seen this? It seems sort of like an issue with >> the TPS65217C chip but I've not found any reported errata on that part. >> >> Thanks >> Jim >> >> >> -- > 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] 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.
