When you select the Mode option as runtime switchable, the cmac_usplus_0_trans_debug module will be present in the example design. This cmac_usplus_0_trans_debug module is responsible for performing the DRP write operation to switch the transceiver operation mode, that is, CAUI-10 to CAUI-4/CAUI-4 to CAUI-10. When you set the switch_caui_mode signal High for at least two clock cycles and make it Low, it starts the DRP write operation for the GT common and GT channel and resets the core. The state transition occurred during this process is shown in This Figure .
