Question

What is the function of the SCON register?

(a) to control SBUF and SMOD registers

(b) to program the start bit, stop bit, and data bits of framing

(c) to control SMOD registers

(d) none of the mentioned

The question was asked in examination.

Question is taken from Serial Port Communication topic in section 8051 Microcontroller of Microcontroller

Answer 1

Right choice is (b) to program the start bit, stop bit, and data bits of framing

For explanation: SCON register is mainly used for programming the start bits, stop bits and data bits of framing. As it consists of bits like RB8, TB8, SM0, SM1, SM2 etc.