It is impossible for 8051 to read data from transmitting SBUF. ( )
8051 Timer 0 can be used as the baud-rate generator. ( )
The TI flag is set by serial port hardware at the completion of receiving of a byte. ( )
The P2 port of 8051 can be used for general I/O or as the high byte of the address bus for access external memory with MOVX instruction. ( )