Hi Ben, [quote userid="612913" url="~/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1522337/tms320f28388d-esc-dl-status-register-reflects-connection-on-port-1-with-only-one-phy-in-design/5874806#5874806"]After configuring the ESC_PHY1_LINKSTATUS using the internal pullup enable the ESC is now reflected the correct DL_STATUS but we are still unable to scan the slave.[/quote] What is ESC DL Status (0x0110:0x0111) register value you see now? We only want Port0 to have Link detected, be Open, and with Communication established. All others, including Port1, should be opposite of this. Checking value of ESC DL Control (0x0100:0x0103) to see if Loop Port X are in Auto / Auto Close mode may be good too. Best, Kevin
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