Matthijs, Did you try any change in the EN pin of U4 (enable signal of 3V3B)? I'm about to try SYS_RESETn (PMIC_PGOOD after U16), but I'm concerned about the 20ms turn on delay (plus 10ms due to the RC). The other option is to go back to use 3V3AUX, and add a 1k load resistor to reduce the discharge time. Thanks, Max
On Friday, May 1, 2015 at 4:35:04 PM UTC-7, Matthijs van Duin wrote: > > On Friday, 1 May 2015 19:01:06 UTC+2, Matthijs van Duin wrote: >> >> I've captured the shutdown sequence on DC versus BAT power in more detail >> > > Just a quick clarification to avoid confusion: > > Unlike the scope images in my original post, these were captured with > BATMON connected to BAT even in the DC-powered case. As I mentioned in my > original post this somewhat changes the behaviour of the TPS65217, and in > particular prevents BAT from ever dropping below 0V, which would be out of > view in these images. > > The vertical range of these images is 0V...4V, grid lines are spaced 0.5V > and 5ms, minor ticks 0.125V and 1ms. > > The images in my original post have vertical range -1V...6V, grid lines > spaced 1V and 20ms, minor ticks 0.25V and 4ms. They were taken with serial > cable attached. > > Matthijs > -- 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.
