In 8051 MC, Which Register is used for Serial Communication?

By K Balaji|Updated : October 6th, 2022
  1. TMOD
  2. SCON
  3. SBUF
  4. PCON

In 8051 MC, SBUF register is used for serial communication. SBUF is an 8-bit register used for serial communication.

Basics of Serial Communication involves:

  • Serial communication is substantially more affordable because only one data line is required.
  • A parallel-in-serial-out register must be used to convert a byte of data into serial bits before it can be sent over a single data line.
  • A shift register with serial-in-parallel-out capability must be present at the receiving end.

For serial communication, the 8051 employs the SBUF register, which is described below:

SBUF registration

  • A byte of data must be put in the SBUF Register before it can be communicated over the transmitted line.
  • As soon as a byte is written into SBUF, it is serially communicated over the transmission line while being framed with the start and stop bits.
  • When a byte of data is received by the 8051 Receiver Line, SBUF keeps it.
  • The 8051 de-frames the bits after they are received serially via the Receiver by removing the stop and start bits, converting the received data into a byte, and then putting it in SBUF. As a result, Choice (3) is accurate.

Summary:-

In 8051 MC, Which Register is used for Serial Communication 1. TMOD 2. SCON 3. SBUF 4. PCON

SBUF register was used in 8051 MC for serial communication. It is a 8-bit register which is used for the purpose of communication

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