DIPLOMA COURSE IN ELECTRONICS AND COMMUNICATION ENGINEERING
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1 Department of Technical Education DIPLOMA COURSE IN ELECTRONICS AND COMMUNICATION ENGINEERING Third Semester Subject: Digital Electronics & Introduction to Microprocessors Contact Hrs/Week:4 Hrs Contact Hrs/Sem: 64 Hrs Contents No. of Hrs UNIT-1 19 Bipolar and Unipolar Digital IC s 07 Data Conversion circuits 12 UNIT-2 19 Memory Devices 12 Programmable Logic Devices 07 UNIT-3 18 Microprocessors and Microcontrollers 14 Display devices 04 Industry Innovations 04 Tests 04 Total 64 GENERAL EDUCATIONAL OBJECTIVES: 1 Know the significance of ADCs and DACs 2 Appreciate the need for memory devices and understand various semiconductor memories 3 Understand various Programmable logic devices. 4 Understand the general features of microprocessors and microcontrollers 5 Understand various display devices DETAILS OF CONTENTS 1. Bipolar and Unipolar Digital ICs Introduction, Logic level Voltage ranges, Current and voltage parameters, fan out, Propagation delays, power requirements, speedpower product, noise immunity, Invalid Voltage levels, Current-Sourcing and current-sinking Action, The TTL Logic family, Circuit operation of TTL NAND gate. Basic MOSFET switch. Circuit Operation of CMOS NAND gate, need for low voltage technology, Open Collector and Open Drain Outputs, Open Collector/ Open Drain buffer/ Drivers, IEEE/ ANSI Symbol for Open Collector / Drain outputs, Tristate Logic Outputs- Advantage, Tristate buffers and Tristate ICs, IEEE/ANSI symbol, High Speed bus interface Logic. 2. Data conversion circuits Digital to Analog converters, D/A converter specifications, Types of D/A converters, Modes of Operation, D/A converter applications, Mention some DAC IC s. A/D converters- Specifications, A/D converter 1
2 terminology, Types of A/D converters, mention some ADC IC s, A/D converter applications. 3 Memory Devices Introduction, Memory Terminology, General memory operations, Random Access Memory, Read only memory, Expanding memory capacity, Secondary storage, Special memory functions 4 Programmable logic devices Fixed logic verses programmable logic- advantages and Disadvantages, Programmable logic devices- PLA, PAL, GAL, CPLD and FPGA, Programmable Array Logic Architecture and Numbering System, implementation examples. Generic Array Logic, Complex Programmable Logic devices, Field Programmable Gate Arrays 5 Microprocessors and Microcontrollers Introduction, Evolution, Inside a Microprocessor, Programming system- machine, assembly program, assembler directives, compilers and operating system, instruction format, basic Microprocessor instructions, Addressing modes, Architectural advancements of processors- pipelining, cache memory operation, memory management, virtual memory system list microprocessors based on word length, Microprocessor selection, Programming Microprocessors, RISC verses CISC, Introduction to Microcontrollers, inside the Microcontroller, list microcontrollers based on word length. 6 DISPLAY DEVICES Operation of seven segment Display, alphanumeric / matrix display, LCD and its types, advantages and disadvantages of LCD's, Comparison between LED's and LCD's, multiplexed displays, 7 segment decoder/driver for LCD display. TEXT BOOKS 1. Digital Electronics Principles and Integrated Circuits- Anil K Maini- Wiley India 2. Digital Systems- Principles and Applications- Ronald J Tocci, Niel S Widmer, Gregory L Moss- Pearson Publications 3. Microprocessotrs and Microcontrollers- Krishna Kant- PHI Reference Books 1. Digital Electronics & Introduction to Microprocessors- By K Shashidhar, Sapna Publications 2
3 2. Digital Electronics - By A. P. Godse 3. Fundamentals of Digital circuits - Anand Kumar PHI 4. Digital Electronics - By D. C. Green 5. Digital Electronics and Logic Design - By B. Somanathan Nair 6. Digital Electtonics - By Tokchim schaum series 7. Digital Principles & applications- Malvino & Leech 8. Digital fundamentals FLOYD & JAIN 9. Digital principles & applications - Thomas.C.Bartee SPECIFIC INSTRUCTIONAL OBJECTIVES: 1. Bipolar and Uni-polar Digital IC s 1.1 Introduction 1.2 To know about Logic level Voltage ranges, Current and voltage parameters, fan out, Propagation delays, power requirements, speedpower product, noise immunity of TTL & CMOS gates. To know about invalid Voltage levels, Current-Sourcing and current-sinking Action. Circuit operation of TTL NAND gate- low, high state, current-sinking and sourcing action, Totem pole output circuit. Basic MOSFET switch. Circuit Operation of CMOS NAND gate 1.7 Need for Low Voltage Technology. Voltage requirements of few 74 low voltage CMOS ICs. 1.8 To understand open Collector and Open Drain Outputs 1.9 To know the use of Open Collector/ Open Drain circuits as buffer/ Drivers 1.10 IEEE/ ANSI Symbol for Open Collector / Drain outputs 1.11 Tristate Logic Outputs- Advantage, Tristate buffers and Tristate IC s, IEEE/ANSI symbol 1.7 To know about High Speed bus interface Logic 2 Data conversion circuits 2.1 Digital to Analog converters Resistive divider network for D/A conversion Binary ladder network for D/A conversion. 2.2 D/A converter specifications- Resolution, Accuracy, Settling time, dynamic range, Monotonocity, Non-linearity and Differential nonlinearity. Simple problems on DAC s 2.3 To know the Types of D/A converters-multiplying type,bipolaroutput and Companding 2.4 Modes of Operation- current steering mode & voltage switching mode of operation. Discuss D/A converter applications- as Multiplier, Divider, Programmable integrator, Low frequency function generator and digitally controlled filters (text 1), 2.6 Mention some DAC ICs. 2.7 A/D converters Specifications- Resolution, Accuracy, Gain and Offset Errors, Gain & Offset Drifts, Sampling frequency and aliasing phenomenon, Quantization errors, Nonlinearity, differential non- 3
4 linearity, Conversion time, aperture & acquisition times, code width. Simple problems on ADC s. 2.8 To know A/D converter terminology- Uni-polar & Bipolar mode operation, Coding, low byte & high byte, right justified and left justified data, Command register, status register and control lines 2.9 Discuss Types of A/D converters- Flash, counter type, successive approximation, single and dual slope A/D converters, 2.10 Mention some ADC ICs, study the internal architecture of ADC Discuss A/D converter applications- Data acquisition (Text 1) 3 Memory Devices 3.1 Introduction 3.2 TO know Memory Terminology- Memory cell, Word, Byte, Capacity, Density, Address, Read operation, Write operation, Access time, Volatile & Non volatile Memory, RAM, SAM, RWM, ROM, SRAM, DRAM, Main memory, Auxiliary memory. 3.3 Explain General memory operations- CPU-memory connectionswrite operation, read operation Explain the working of Random Access Memory- static and dynamic memory-basic cell Structure. Explain the working of Read only memory- Architecture, types of ROM Masked programmed ROM, PROM, EPROM, Flash memory study of cell structure and their applications Expanding memory capacity- word size expansion and memory location expansion, simple problems. Secondary storage Magnetic storage devices- principle of operation of hard disk To know about Magneto-optical storage devices, CD ROM, WORM, CD-R, CD-RW, DVD-ROM,USB Flash drive. Discuss Special memory functions- power down storage, cache memory, first-in first-out memory, circular buffers. ( refer for text1, remaining text 2) 4 Programmable logic devices 4.1 Fixed logic versus programmable logic- advantages and disadvantages 4.2 To understand different Programmable logic devices like PLA, PAL, GAL, CPLD and FPGA 4.3 Programmable Array Logic Architecture and Numbering System Implement Boolean functions using PAL 4.4 Generic Array Logic 4.5 Complex Programmable Logic devices- Architecture and applications 4.6 Field Programmable Gate Arrays- Architecture and applications 5 Microprocessors and Microcontrollers 5.1 Introduction 5.2 Evolution 5.3 Block diagram description of microprocessor. 5.4 Programming system- machine, assembly program, assembler 4
5 directives, compilers and operating system 5.5 Instruction format- Basic Microprocessor instructions- data transfer instructions, logic, control transfer and machine control instructions 5.6 Addressing modes- memory direct, immediate, register direct, register indirect, indexed, implicit and relative addressing modes 5.7 Architectural advancements of processors- pipelining, cache memory operation, memory management, virtual memory system 5.8 List 8, 16, 32 bit Microprocessors 5.9 Microprocessor selection- selection criteria and selection table for common applications Programming Microprocessors-steps involved in executing assembly /high level language programs RISC versus CISC processors Block diagram description of Microcontroller Applications 5.14 List 8, 16, 32 bit Microcontrollers 5.15 Differentiate Microprocessors and Microcontrollers (For 5.4 &5.7 refer text 3) 6 DISPLAY DEVICES 6.1 Explain the operation of seven segment display common anode and common cathode type. 6.2 Explain the alphanumeric / matrix display. 6.3 Explain the LCD and its types. 6.4 Explain the dynamic scattering type and field effect type 6.5 List out advantages and disadvantages of LCD's. 6.6 Comparison between LED's and LCD's 6.7 Explain multiplexed displays 6.8 Explain 7 segment decoder/driver for LCD display 5
6 MODEL QUESTION PAPER TIME :3 HRS MAX.MARKS :100 Note: 1)Section A is compulsory. 2) Answer any two main questions from each of the remaining Sections SECTION: I 1 a Fill in the blanks with suitable words 5X1 (i) The number of comparators required to build an 8-bit flash ADC is (ii) Register which keeps track of instruction execution is (iii) MC68000 is a bit processor (iv) RISC stands for (v) A basic memory cell in a DRAM is b Write a note on Generic Array Logic 5 SECTION: II 2 a Explain the circuit operation of TTL Nand gate for low and high state 10 b What three characteristics of real wires add up to distort signals that move through them 03 c What is the IEEE/ANSI symbol for tristate outputs 02 3 a Explain the working of Binary ladder network for converting the digital to analog data 08 b Define the terms Resolution & Accuracy as applied to DAC 04 c Determine the resolution of a 12-bit A/D converter having a full scale analog input voltage of 5v a Explain the working of Successive approximation type ADC with block diagram 08 the digital to analog data b Define quantization error in ADC s 03 c Explain the working of low frequency function generator using DAC 04 SECTION: III 5 a Define the terms i) memry cell ii) memory word iii) Access time 06 b With A CPU memory connection block diagram explain the steps that take place when the CPU writes to memory 06 c Explain the construction of basic SRAM memory cell 03 6 a Two 16MB RAMs are used to build a RAM capacity of 32MB. Show the configuration and also state the address inputs for 6
7 which the two RAMs will be active. The two RAMs have common i/o pins, a write enable i/p that is active low and a active high chip select i/p. 08 b Write a note on Cache memories 04 c mention the differences between fixed logic and programmable logic 03 7 a With neat block diagram explain the internal architecture of CPLD 08 b c Implement the Boolean function Y= A BC+ A B C+ABC using PAL 05 Mention the number of i/o lines in PAL device designated as PAL-16L8 02 SECTION: IV 8 a Explain the inside of a Microprocessor with a neat schematic 07 b Explain the following addressing modes i) Immediate ii) Indexed 04 c List the differences between RISC and CISC processors 04 9 a List the differences between Microprocessor and Microcontroller 04 b Explain the inside of a Microcontroller with a neat schematic 07 c List the advantages and disadvantages of LCD a Explain the operation of seven segment display. 06 b Explain the operation dynamic scattering type of LCD. 06 c Write a note on multiplexed displays. 03 7
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