|  | #OBUF_6 | 
|  | set_property PACKAGE_PIN D10 [get_ports {led[0]}] | 
|  | set_property DRIVE 12 [get_ports {led[0]}] | 
|  | #OBUF_7 | 
|  | set_property PACKAGE_PIN A9 [get_ports {led[1]}] | 
|  | 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 PACKAGE_PIN E3 [get_ports out_a] | 
|  | 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 PACKAGE_PIN C2 [get_ports {out_b[0]}] | 
|  | set_property SLEW SLOW [get_ports {out_b[0]}] | 
|  | set_property IOSTANDARD LVCMOS18 [get_ports {out_b[0]}] | 
|  | #bottom_inst.OBUF_11 | 
|  | set_property PACKAGE_PIN R2 [get_ports {out_b[1]}] | 
|  | 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 PACKAGE_PIN M6 [get_ports {led[2]}] | 
|  | set_property SLEW FAST [get_ports {led[2]}] | 
|  | set_property IOSTANDARD DIFF_SSTL135 [get_ports {led[2]}] | 
|  | #bottom_intermediate_inst.OBUF_8 | 
|  | set_property PACKAGE_PIN N4 [get_ports {led[3]}] | 
|  | set_property DRIVE 16 [get_ports {led[3]}] | 
|  | set_property IOSTANDARD SSTL135 [get_ports {led[3]}] | 
|  | #OBUFTDS_2 | 
|  | set_property PACKAGE_PIN N2 [get_ports signal_p] | 
|  | set_property PACKAGE_PIN N1 [get_ports signal_n] | 
|  | set_property SLEW FAST [get_ports signal_p] | 
|  | set_property IOSTANDARD DIFF_SSTL135 [get_ports signal_p] | 
|  |  |