Microprocessor [PCC-EE-18]

8-bit 16-bit and 32-bit Microprocessor Overview

1 Explain how 16 address bus pins and 8 data bus pins are accommodated using time sharing concept in the context of 8085 10
microprocessor.
2 Explain the demultiplexing of address and data bus in the context of 8085 microprocessor. 10
3 Explain the function of ALE pin of 8085 microprocessor in demultiplexing. 5
4 Explain the function of IO/M pin of 8085 microprocessor. 2
5 Explain the operation of RD and WR pins of 8085 microprocessor. 2
6 Explain the operation of SOD and SID pin of 8085 microprocessor. 2
7 What is serial mode of data transfer? Name the pins available in 8085 microprocessor for serial mode operation. 2
8 What are the general process to execute an interrupt request? What is ISR? 5
9 Arrange the available hardware interrupts of 8085 as per the increasing order of priority. 2
10 Write down the steps of operations performed by 8085 when an interrupt request comes through INTR pin. 5
11 Explain the operation of TRAP interrupt in 8085 microprocessor. 2
12 What is masked interrupt? Name the masked interrupts available in 8085 microprocessor 2
13 What is vectored interrupt? Name the vectored interrupts available in 8085 microprocessor. 2
14 Explain the operation of HOLD and HLDA pin of 8085 microprocessor. 2
15 What is DMA operation? Name the pins available in 8085 microprocessor for DMA operation. 2
16 What is pipeline concept introduced in 8086 microprocessor. 2
17 Draw the architecture of 8086 microprocessor and show different functional blocks and registers. 10
18 What are the functions of BIU and EU of 8086 microprocessor? 5
19 What is the utilization of instruction queue in 8086 microprocessor? 2
20 How many memory sagments are possible in 8086 interfacing? What is the size of each segments? How to initialize them? 5

21 How many segment registers are there in 8086 microprocessor? What are their utilization? 5
22 How 20-bit physical address is calculated in 8086 microprocessor? 2
23 What are the differences between minimum and maximum mode of 8086 microprocessor? 2
24 What are the different working modes of Intel 80386 microprocessor? 2
25 Explain Real address mode of 80386 microprocessor. 5
26 Explain Protected Virtual Address Mode of 80386 microprocessor. 5
27 What are the size of physical memory address space and virtual memory address space for 80386 processor in Protected 2
Virtual Address Mode?
28 Explain the concept of paging used in Intel 80386 microprocessor. 2
29 Name the different units in the architecture of 80386 microprocessor 2
Embedded System
1 Can we call a computer as an embedded system? If not, what are the differences? 5
2 What are the different types of embedded system based on performance and functional requirement? Explain each of them 5
briefly.
3 What are the different types of embedded system based on the performance of the microcontroller? Explain each of them 5
briefly.
4 Draw the hardware architecture of an embedded system. What can be the core made up with? 10
5 What are the basic features of RTOS? How it differes from general purpose OS? 10
ARM Processor
1 Explain the major design rules of RISC system design. 5
2 List the special features of ARM processor design. 5
3 With a neat sketch explain ARM core data flow model 10
4 Explain the register file of ARM processor with a neat sketch 10
5 Explain the bit structure of CPSR in ARM processor. 10
6 Explain different processor modes of ARM core 10
Memory Interfacing
1 Explain the differences between static and dynamic memory. 2
2 Calculate the total addressable memory space if the address bus size is 20. 2
3 Show the connection of a 4 byte memory with 2 address line and a 2 to 4 decoder. 2
4 Address bus width of 8008 microprocessor is 14 bit. Calculate the maximum addressable memory size. 2
5 How 2 devices can be accessed using 1 address line with the help of logic gates? 2
6 With a neat sketch show how 4 devices can be connected with 2 address line using a decoder. 5
7 An 8085 microprocessor is connected with 32 KB RAM and 32 KB ROM. Calculate the address range in hex for RAM and 5
ROM.
8 Design an interfacing between 8085 microprocessor and 4 KB EPROM. Calculate the address range also. 10
 Microprocessor [PCC-EE-18]

9 Design the interfacing of a 256 byte of RAM with an 8085 microprocessor such that the address range is 7F00H to FFFFH. 10

10 Four 16 KB memory chips are available. How to conect them them with 8085 microprocessor? Calculate the address 10
assigned to each chip.
11 Calculate the address lines required for 10 K Byte memory chip 5
12 Using 16-bit address line how many 8-bit register can be accessed? 2
13 Consider the number of address lines are 13. Calculate the number of memory chips required to access total address space 5
if each memory chip is 1024 byte.
14 If the memory chip size is 256X1 bits, how many chips are required to make up 1k bytes of memory? 2
Communication
1 Explain the differences between serial and parallel data transfer. 2
2 Explain the differences between synchronous and asynchronous mode of data transfer. 2
3 With a neat sketch explain the I2C communication protocol. 5
4 With a neat sketch explain the SPI communication protocol. 5
5 Give a comparison between I2C and SPI communication protocol. 5
6 Explain UART communication protocol. Show the bit pattern used for data transmit. 5
7 Explain the function of the following pins in the context of DB9 male of RS232 communication - CD, TXD, DSR, RTR 5
8 Explain the function of the following pins in the context of DB9 male of RS232 communication - RxD, DTR, RTS, CTS 5
9 What is piconet in Blue-tooth communication? 2
10 What is frequency hopping in Blue-tooth communication? 2
11 In a Blue-tooth device it is written "Mac No. 000666422152". Find out Organization Unique Identifier (OUI) and unique ID of 2
the device.
12 What are the different steps involved while connecting devices through Blue-tooth? 5
13 What are the different connection mode in Blue-tooth communication? 2
14 Draw different layers of Zigbee architecture. 2
Peripherals
1 List the operating mode of 8255 PPI. 2
2 Explain the control word format for mode 0 in 8255 PPI. 5
3 Explain the control word format for mode 1 in 8255 PPI. 5
4 Explain the control word format for BSR mode in 8255 PPI.
5 Explain the control word format for bidirectional mode in 8255 PPI. 5
6 Write the BSR control word of 8255 to set bits PC7. 2
7 Write initialization instruction for the 8255A to set up- Port A as an o/p port in mode 0, Port B as an o/p port in mode 1 for 10
interrupt I/O, Port C (upper) as an O/P in mode 0.
8 Write the handshaking signals and their functions if port A of 8255 is set up as an input port in mode1. 5
9 Write the handshaking signals and their functions if port B of 8255 is set up as an output port in mode1. 5
10 Explain the control signal used bidirectional mode of 8255 PPI. 5
11 Explain Status Read Back Command in 8254 Timer. 10
12 Explain Counter Latch in 8254 Timer. 10
13 What are the different modes of operation of 8254 timer? 2
14 Draw the block diagram of 8254 timer and describe its different section. 10
15 Explain the control word format of 8254 timer. 10
16 Write a program in 8051 to set Counter 0 of 8254 timer in Mode 1. Choose the address of 8254 chip as per your choice. 10
17 Generate a square wave of 1ms period using 8254 timer. The input frequency is 2MHz? Write the program in 8051 assembly 10
language. Choose the address of 8254 chip as per your choice.
18 How the output frequency of the 8254 determined in rate generator mode? 5
19 What is the difference between hardware triggered strobe and software triggered strobe on 8254? 2
20 How many channel available in 8257 DMA controller? Name the registers available in each channel? 2
21 Explain the mode set register of 8257 DMA controller. 10
22 What is rotating priority mode in 8257 DMA controller? 5
23 Explain the auto load mode of 8257 DMA controller. 5