@User Are vccd1 and vccd2 (1.8 V supply )pins on caravan isolated or shorted ? same with vssa1 and vssa2?

These are two isolated voltage domains. The VSSD1/2 are shorted through the substrate, but there is no low-impedence connection between the two. VCCD1/2 are effectively isolated. VDDA1/2 are similarly situated, in the 3.3V domain, with VSSA1/2 shorted through substrate but not directly tied through metal.

Thank you very much.