SPRUII0F May 2019 – June 2024 TMS320F28384D , TMS320F28384D-Q1 , TMS320F28384S , TMS320F28384S-Q1 , TMS320F28386D , TMS320F28386D-Q1 , TMS320F28386S , TMS320F28386S-Q1 , TMS320F28388D , TMS320F28388S
The UART can be placed into an internal loopback mode for diagnostic or debug work by setting the LBE bit in the UARTCTL register. In loopback mode, data transmitted on the UnTx output is received on the UnRx input. Note that the LBE bit must be set before the UART is enabled.