Where are you looking exactly? Gerald
On Thu, Mar 20, 2014 at 8:51 AM, Kees k <keeskwekkeb...@gmail.com> wrote: > > > The 5V is fine (maybe a little spike of 0.8V after 60 ms PS). > > However, the 3.3V gives a strange 2-stage powerup cycle. I compared a > revision A5C to a revision A6, see plots below. > > As can be seen the A5C has a 'normal ' powerup cycle on the 3.3V, but the > A6 a 2-stage powerup cycle. May this cause any problems with PHY? > > > > > <https://lh6.googleusercontent.com/-oYQffwcsuTE/Uyrx4haRJUI/AAAAAAAACC8/cW3xQual_Q8/s1600/20140320_143534.jpg> > > > <https://lh3.googleusercontent.com/-_veLX8dOp6w/Uyrx2A6EsRI/AAAAAAAACC0/fOMrXaeqSfE/s1600/20140320_142321.jpg> > > > On Thursday, March 20, 2014 2:44:33 PM UTC+1, c...@isbd.net wrote: >> >> Robert Nelson <robert...@gmail.com> wrote: >> > On Thu, Mar 20, 2014 at 4:48 AM, Kees k <keeskwe...@gmail.com> >> > wrote: >> > > I have seen this problem repeatedly by A6 revision hardware, but not >> with >> > > revision A5C hardware (I am running exactly the same software on >> both). >> > > >> > > Noteworthy is that the "PHY problem" only appears when powering the >> BBB via >> > > the headers. Powering via USB does not give any problems. >> > >> > Well, if it works via USB, but not with the headers. (I didn't check >> > if the Ethernet can be powered from the headers.) >> > >> I'm powering my BBB using P9 pins 1/2 for 0v and 5/6 for +5v, I'm >> using the 'real' ethernet connection and it works fine. It has run >> with no problems for at least 24 hours, staying connected (ssh) to my >> desktop computer. >> >> -- >> Chris Green >> ยท >> >> -- > 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/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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
