#rs232
set_location_assignment PIN_D22 -to txd
- set_location_assignment PIN_D23 -to rxd
+ #set_location_assignment PIN_D23 -to rxd
set_global_assignment -name FMAX_REQUIREMENT "33.33 MHz" -section_id sys_clk
set_instance_assignment -name CLOCK_SETTINGS sys_clk -to sys_clk