Glad you figured it out. Gerald
On Thu, Apr 17, 2014 at 3:36 PM, Ross Morrison <r...@buy-ei.com> wrote: > Never mind again. After digging deeper into the TRM and referring to note > 11 for VDDSHV6 (page 42), that power supply can be 3.3v and therefore B15 > is happy at 3.3v. On the other hand RTC_PORZ can only be at 1.8 (VDDS_RTC). > I understand fully now and the confusion between the BBW and BBB is gone. > > Again, thank you Gerald and team for all the great work. > > Ross > > > > > On 04/17/2014 10:31 AM, Ross Morrison wrote: > >> Hi All (Gerald), >> >> A bit confused about the differences between the BBW and BBB Sitara balls >> B15 and B5 voltage levels. Reviewing the schematic for the BBW it appears >> PORZ (B15) is being driven from the TPS65217B pin PGOOD (26) and PGOOD's >> power supply source VIO is at 3.3v. While on the Sitara RTC_PORZ (B5) is >> being driven at 1.8 v due to the resistor divider R141 and R18. My >> understanding from reading the TRM on the Sitara is that both B15 and B5 >> are 1.8v level pins. >> >> Now on the BBB, both B15 and B5 on the Sitara are being driven directly >> from the TPS65217C who's VIO is at 1.8v and this all makes sense. >> >> Any help in clarifying my confusion would certainly help. >> >> We're in the process of bringing up our new custom board based on the BBB >> and have burned up a Sitara because we pushed 3.3v into the VIO pin of the >> TPS65217C and therefore killed the Sitara via B15 and B5. >> >> Thanks Gerald. >> >> > -- > 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.
