https://community.nxp.com/t5/PowerQUICC-Processors/Power-and-IO-shorts-spontaneously-developing-on-P1021/m-p/1440574#M4125 <P>We have seen several field failures of a product containing the P1021 processor.&nbsp; Apparently spontaneously, while the system is up and running, the system shuts down.&nbsp; Board level analysis shows dead shorts to ground of the 1.0V and 3.3V rails.&nbsp; Upon removal of the processor, dead shorts are found on the Vddc (Core 0 and platform supply), the OVdd (IO subset supply), and on 8 or so IO pins in a tight cluster in the vicinity of the OVdd pins.</P><P>This would appear to be the result of some kind of over-voltage stress, but we can not find an obvious cause.&nbsp; Does this seem more likely from an event on the OVdd line or on one of the failing IOs?&nbsp; Note OVdd, BVdd, and CVdd are all tied to the 3.3V rail, and only IO associated with OVdd are found with shorts.&nbsp; No other parts on the board are found to be damaged - many others share the 3.3V rail.&nbsp; No other devices share the 1.0V rail.</P><P>Any thoughts on possible causation given these symptoms?</P> Thu, 07 Apr 2022 12:25:34 GMT gregbuchannan 2022-04-07T12:25:34Z https://community.nxp.com/t5/PowerQUICC-Processors/Power-and-IO-shorts-spontaneously-developing-on-P1021/m-p/1440574#M4125 <P>We have seen several field failures of a product containing the P1021 processor.&nbsp; Apparently spontaneously, while the system is up and running, the system shuts down.&nbsp; Board level analysis shows dead shorts to ground of the 1.0V and 3.3V rails.&nbsp; Upon removal of the processor, dead shorts are found on the Vddc (Core 0 and platform supply), the OVdd (IO subset supply), and on 8 or so IO pins in a tight cluster in the vicinity of the OVdd pins.</P><P>This would appear to be the result of some kind of over-voltage stress, but we can not find an obvious cause.&nbsp; Does this seem more likely from an event on the OVdd line or on one of the failing IOs?&nbsp; Note OVdd, BVdd, and CVdd are all tied to the 3.3V rail, and only IO associated with OVdd are found with shorts.&nbsp; No other parts on the board are found to be damaged - many others share the 3.3V rail.&nbsp; No other devices share the 1.0V rail.</P><P>Any thoughts on possible causation given these symptoms?</P> Thu, 07 Apr 2022 12:25:34 GMT https://community.nxp.com/t5/PowerQUICC-Processors/Power-and-IO-shorts-spontaneously-developing-on-P1021/m-p/1440574#M4125 gregbuchannan 2022-04-07T12:25:34Z