Microprocessor : Assignment 3

Microprocessor (PCEC4301), 5th Sem. EIE Assignment -3

Short Question Type:

1 What are the different modes of operation are present in 8255?(BPUT 07)

2 Which bits of control word determine the modes of operation? (BPUT 08)

3 Design the control word for Port A used as bidirectional I/O and Port B used as Handshake Input.

4 What are the different modes of operation supported by 8254?

5 Explain the rate generator mode of 8254.

6 8254 operate in mode 3 and loaded with the decimal value 15. Determine the time period of square wave? (clk=1.19318MHz, Gate=+5V).

7 What are the different modes of operation can operate by 8237?

8 Specify the control word and the command word for data communication using 8251 with the following specification:

a. Asynchronous mode

b. 1200 baud (TxC# = RxC# = 76.8 kHz)

c. 8-bit character

d. Even parity

e. One stop bit

9 What are the modes of operation of 8279?

10 Explain the instruction cycle?

11 What do you mean by Machine language program and Assembly language program.

12 What do you mean by bus in microprocessor? Also list out different bus present in microprocessor system.

13 What is tristate bus?

14 Name some 8-bit, 16-bit and 32-bit microprocessor.

15 Name one bit-slice processor and why it is different from the microprocessor.

16 What is 8051? Also write some feature of this chip.

17 Write some feature of T-800 T-30 transputer.

Long Question Type:

1 What control word must be written into the control register of the 82C55A such that Port A is configured for bidirectional operation and Port B is set up with mode 1 outputs? Write a sequence of instructions needed to load the control register of an 82C55A with the above control word. Assume that the control register of 82C55A resides at address 0FH of the I/O address space. (BPUT 2009)

2 Design an interface for one input and one output device using I/O mapped I/O scheme using 8255 PPI mode-1. Write a program to read a data byte from input device, if it is less than 10H transfer 00H to output device else transfer FFH.(BPUT 2008)

3 Design an interfacing circuit for generation of a square wave using the 8254 and 8086.

4 Draw the interfacing diagram of 8237 and 8086. Explain the operation of 8237.

5 Design the interfacing diagram of 8251 and 8086. Write initialization instructions to set up 8251 for the asynchronous mode, 300 baud, and 7-bit character with no parity where the clock connected to RxC# and TxC# will be 4.8 kHz.

6 Explain the architecture of 8279.

7 Explain the different data transfer scheme related to I/O device.

8 Write short notes on:

a. Pipelining b. Cache Memory

c. Memory Management d. Virtual memory System