Well ece is quite a popular branch at pes and faces as much stiff competition as cse does from all over india , with a rank of 1645 you are on borderline of getting/not getting ece as cut off rank for round one generally goes upto 1500 for 1st round and for 2nd round it goes upto 1599-1700 (according to previous years analysis) so you might or might not get ece at pes depending upon current years merit list no of students opting for ece etc, though with this rank you can get branches like ee,me,civil.