I have some uncertainties about connecting this PMIC and i.MX7D. In datasheet, diagrams on page 3-4. (link below),
- NVCC_GPIO1 and VDD_LPSR input on i.MX7D share 1.8V VOLPSR rail from PMIC,
- But on MCIMX7D-SABRE schematic NVCC_GPIO1 shares 3.3V with NVCC_GPIO2.
First option seams OK because its the same in i.MX7D datasheet (screenshot attached)
Now question is what reference should I follow?