|  | #set_property LOC R2 [get_ports led] | 
|  | #OBUF_6 | 
|  | set_property DRIVE 12 [get_ports led[0]] | 
|  | #OBUF_7 | 
|  | set_property IN_TERM UNTUNED_SPLIT_40 [get_ports led[1]] | 
|  | set_property SLEW FAST [get_ports led[1]] | 
|  | set_property IOSTANDARD SSTL135 [get_ports led[1]] | 
|  | #OBUF_OUT | 
|  | set_property IN_TERM UNTUNED_SPLIT_50 [get_ports out_a] | 
|  | set_property SLEW FAST [get_ports out_a] | 
|  | set_property IOSTANDARD LVCMOS33 [get_ports out_a] | 
|  | #bottom_inst.OBUF_10 | 
|  | set_property SLEW SLOW [get_ports out_b[0]] | 
|  | set_property IOSTANDARD LVCMOS18 [get_ports out_b[0]] | 
|  | #bottom_inst.OBUF_11 | 
|  | set_property DRIVE 4 [get_ports out_b[1]] | 
|  | set_property SLEW FAST [get_ports out_b[1]] | 
|  | set_property IOSTANDARD LVCMOS25 [get_ports out_b[1]] | 
|  | #bottom_inst.OBUF_9 | 
|  | set_property SLEW FAST [get_ports led[2]] | 
|  | set_property IOSTANDARD DIFF_SSTL135 [get_ports led[2]] | 
|  | #bottom_intermediate_inst.OBUF_8 | 
|  | set_property DRIVE 16 [get_ports led[3]] | 
|  | set_property IOSTANDARD SSTL135 [get_ports led[3]] | 
|  | #set_property INTERNAL_VREF 0.600 [get_iobanks 14] | 
|  | #set_property INTERNAL_VREF 0.675 [get_iobanks 15] | 
|  | #set_property INTERNAL_VREF 0.750 [get_iobanks 16] | 
|  | #set_property INTERNAL_VREF 0.900 [get_iobanks 34] | 
|  | #set_property INTERNAL_VREF 0.900 [get_iobanks 35] | 
|  |  |