Hindustan Institute of Technology and Science (HITE) 2006 B.E Computer Science Microprocessor And Microcontroller - exam paper

MICROPROCESSOR AND MICROCONTROLLER

PART A:
1.Name any 2 important methods available for fault correction during serial connection?
2.Write the BSR control word format in 8255?
3.What is meant by DMA operation?State its advantages?
4.What is meant by time multiplexed LED display?
5.Why instrumentation amplifier is needed while interfacing analog signals with microprocessor?
6.What is meant by burst mode of data in DMA?
7.Write down the function of OBF in 8255?
8.What are modes of operation supported by 8255?
9.What are the various registers available in a channel of DMA controller?
10.What is internal operating frequency of 8279?

PART B:
11.Explain in detail with a neat diagram,how 8259 can be used ofr interupt generation and control?
12.What are the capabilities of 8251A-USART for synchronous communication purpose?Explain its operation with a neat diagram?
13.(a)Describe the DMA controller?
(b)Explain the architecture of 8085?
OR
(c)Explain programmable periphral interface-8255IC?
(d)Explain the architecture of 8086 and its operation?
14.With a block diagram discuss the working of programmable interrupt controller?
15.(a)Write a program to demonstrate mode three operation of timer 8254?
(b)Draw the block diagram of Intel 8255.Mention the operating modes?
OR
(c)Bring about the features of 8251 and 8259?
(d)Draw the hardware circuit needed for interfacing a 4 phase stepper motor to a microprocessor?

Earning:   Approval pending.