"H:\Product\LK\FPGA\LK-Xilinx-TB\VerilogHDL\RS485\top.v" Line 42: Port CLK180 is not connected to this instance Node <data_tx_3> of sequential type is unconnected in block <top>. Node <data_tx_4> of sequential type is unconnected in block <top>. Node <data_tx_5> of sequential type is unconnected in block <top>. Node <data_tx_6> of sequential type is unconnected in block <top>. Node <data_tx_7> of sequential type is unconnected in block <top>. The small RAM <Mram_data_buffer_index[2]_X_1_o_wide_mux_11_OUT> will be implemented on LUTs in order to maximize performance and save block RAM resources. If you want to force its implementation on block, use option/constraint ram_style. Node <data_tx_3> of sequential type is unconnected in block <top>. Node <data_tx_4> of sequential type is unconnected in block <top>. Node <data_tx_5> of sequential type is unconnected in block <top>. Node <data_tx_6> of sequential type is unconnected in block <top>. Node <data_tx_7> of sequential type is unconnected in block <top>. FF/Latch <timer_cnt_state_31> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_30> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_29> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_28> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_27> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_26> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_25> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_24> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_23> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_22> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_21> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_20> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_19> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_18> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_17> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_16> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_15> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process. FF/Latch <timer_cnt_state_14> has a constant value of 0 in block <top>. This FF/Latch will be trimmed during the optimization process.