I desgin a board with an IMX28 and I only use 3V3 and 1V8 from the IMX power supply. I didn't use VDD1P5 neither VDDD.
So, how can I connect VDD1P5 ? Can I leave it unconnected without capacitors or do I need to connect it to capacitors (10n, 100n 1u, 10u and 25u) ?
And what about VDDDx and DCDC_VDDD :
- Can I leave them unconnected ?
- Do I need to connect them together but without capacitors ?
- Or do I need to connect them together and with capacitors ?
This is my current schematic :
Do I need C1-C5 and C14-C21 ?
Many thanks for your help.