As this year only percentiles are given as if these are matched with past year marks data the cutoff fir CSE should be around 99.8 percentile and for ECE around 98.4 percentile . The person who secured 287 marks last year got the seat in first round this year at 287 he is at around 99.8 percentile .But rank is around 2000 and seats are limited to 90.

Hey.

Here is the opening and closing marks for admission in IIIT Hyderabad in each branch in the previous year. You can expect a similar cut off this year.

CSE  335  268  

CSD  268  255

 ECE  261  224  

 ECD  223  214  

CND  255  213  

Best of luck