is there any particular reason for diving ground into 3 pieces?
from the eval board schematic which is given by TI (the name of schematic is "PROC076A(001)_Sch")
there are 3 ground nets which are GND_RTN, GND, GND_BS
and wondering there aren't any conncetions between those grounds,
well. GND_RTN and GND are connected by capacitor C33(2200pF) but they still not connected electrically(DC open).
so, my questions are (in shortly)
1. why the grounds are separted?
2. and why those grounds are not connected?
look forward your answer
as soon as possible