Quiz on UART and Serial Communication

Identify the acronym for UART

• Universal Asynchronous Relay Transfer

• Universal Asynchronous Receiver Transfer

• Universal Asynchronous Relay Transmitter

• Universal Asynchronous Receiver Transmitter

identify the type of data flow?

• Simplex

• Duplex

• Triplex

• Quadplex

Choose the primary function of the SBUF register?

• To hold data for serial communication

• To set the baud rate

• To enable multiprocessor communication

• To control data transfer rates

In RS-232, the high and low bits are represented by____________

• frequency modulation

• current levels

• pulse width modulation

• flowing voltage ranges

What is the purpose of the start bit in asynchronous communication?

• To signal an error

• To confirm data integrity

• To indicate the end of data

• To initiate data reception

Which register controls data communication in the 8051 microcontroller?

• SBUF register

• PCON register

• SCON register

• TMOD register

What does the TI flag in the SCON register indicate?

• A byte has been completely transmitted

• A byte has been completely received

• Data is being transmitted

• An error has occurred

Which mode of operation allows for variable baud rate in the 8051?

• Mode 1

• Mode 2

• Mode 0

• Mode 3

What is the function of the PCON register?

• To initiate data transmission

• To set the timer mode

• To hold received data

• To control data transfer rates

How many bits are transmitted in Mode 1 of the 8051 UART?

• 12 bits

• 8 bits

• 10 bits

• 16 bits