Serial Communication in 8051-2

Which register in the 8051 is used to configure the serial communication mode (8-bit or 9-bit) during serial data transmission?

• • SBUF

• • TCON

• • SCON

• • PCON

In the 8051, what is the role of the SM0 and SM1 bits in the SCON register?

• • Baud rate selection

• • Serial mode selection

• • Start bit detection

• • Stop bit detection

In 8051 serial communication, which interrupt flag is set when a byte is completely received?

• • RI (Receive Interrupt)

• • TI (Transmit Interrupt)

• • IE (Interrupt Enable)

• • EA (Enable All)

What is the function of the REN bit in the SCON register of the 8051?

• • Register Enable

• • Receive Enable

• • Reset Enable

• • Read Enable

What is the role of the SCON register's SM2 bit in the 8051 serial communication?

• • Baud rate generation

• • Stop bit configuration

• • Multiprocessor communication

• • Start bit detection

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