MICROPROCESSORS

What is the bit transmitting or receiving capability of mode 1 in serial communication?
(i) 8 bits
(ii) 10 bits
(iii) 11 bits
(iv) 12 bits

Which serial modes possess the potential to support the multi-processor type of communication?
(i) Modes 0 & 1
(ii) Modes 1 & 2
(iii) Modes 2 & 3
(iv) All of the above

Which byte has the capability to interrupt the slave when SM2 bit is assigned to be '1' after the initialization process in the multiprocessor mode of communication?
(i) Address byte
(ii) Data byte
(iii) Both (i) and (ii)
(iv) None of the above

What is the required baud rate for an efficient operation of serial port devices in 8051 microcontroller?
(i) 1200
(ii) 2400
(iii) 4800
(iv) 9600

Which pin of RS232 connector is used for Transmit Data (TXD)?
(i) Pin 2
(ii) Pin 1
(iii) Pin 4
(iv) Pin 3

I2C uses how many lines?

(i) 1
(ii)
(iii) 2
(iv) 8

Which lines are utilized during the enable state of hardware flow control in DTE and DCE devices of RS232?
(i) CD and IR
(ii) DSR and DTR
(iii) RTS and CTS
(iv) None of the above

How many lines are used in the basic SPI communication?
(i) 5
(ii) 2
(iii) 4
(iv) 3

Which protocol supports multi-master configuration?
(i) UART
(ii) I2C
(iii) RS232
(iv) SPI

Which protocol is commonly used for sensor interfacing?

(i) I2C
(ii) FTP
(iii) HTTP
(iv) SMTP

Which of the following statement is false regarding the RTS and CTS signals?
(i) RTS is on the receiver side
(ii) CTS is on the transmitter side
(iii) RTS is made low at first
(iv) CTS is made low at first

Which protocol standard of serial communication specifies the bi-directional and half-duplex form of data transmission by allowing various numbers of drivers and receivers in bus configuration?
(i) RS232
(ii) RS2485
(iii) RS422
(iv) RS423

Write a program for 8051 to transmit "WELCOME TO INDIA" at the display connected to port 1 at 9600 baud for external crystal frequency of 11.0592 MHz.

Determine if an 8051 in mode 1 can communicate with an 8051 in mode 3.

Character transmission can be done by using a time delay greater than the character time before moving a new byte to SBUF. Explain why character reception must use an interrupt flag if all characters are to be received.

Assume you are determined to use mode 0 as a communication mode from one 8051 to another. Outline a system of hardware and software that would allow this.

Explain the interfacing of Bluetooth and Zigbee with the 8051 microcontroller.

Discuss the RS232 communication interface with neat diagrams.

Explain the interfacing of wireless communication protocols in embedded systems.

Explain serial ports of 8051 microcontroller. Also discuss about registers used in serial communications.

Discuss Zigbee protocol and its advantages.