Other Parts Discussed in Thread: DLPC3478
today I came across strange issue. DLPA2005 is used as a PMIC for DLPC3478. When PROJ_ON is pulled low, the 1V8_DLPC on LS_OUT falls just to 0V95 while I would expect 0V as the other voltage for DLPC (1.1V). When pull-down is applied (e.g 4k7), the voltage decreases and jumps back when pull-down is removed.
The DLPC is being supplied just by 1V1 and 1V8_DLPC from DLPA. However, there is a couple of 1V8 signals that goes from MCU to DLPC (GPIO, parallel stream interface) that comes from different 1V8 supply. Really cant find any external pull-up that would back feed this 1V8 to 1V8_DLPC, is possible that this happens through the internal chip structure? Does this affect chip lifetime/reliability/functinality somehow?