Slide 1 1 KỸ THUẬT SỐ HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering CHƯƠNG 1 GIỚI THIỆU VÀ MÃ Assoc Prof Nguyen Thanh Hai HCMC University of Technology and[.]
HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering KỸ THUẬT SỐ CHƯƠNG 1: GIỚI THIỆU VÀ MÃ Assoc Prof Nguyen Thanh Hai HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering Digital Systems Chương 1: Giới Thiệu Mã Chương 2: Đại Số Bool Cổng Logic Chương 3: Logic Tổ Hợp Chương 4: Logic Tuần Tự Chương 5: Họ TTL-CMOS Chương 6: Mạch Dao Động Chương 7: Bộ Nhớ Chương 8: Chuyển Đổi ADC Assoc Prof Nguyen Thanh Hai HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering Introduction What is analog Representation? What is digital Representation? Volt Amplitude analog signal Analog Continuous time digital signal High Low time Binary number: 1 0 1 0 Digital Discrete Assoc Prof Nguyen Thanh Hai HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering Typical voltage assignments in digital system Typical digital system timing diagram Assoc Prof Nguyen Thanh Hai HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering A digital circuit responds to an input’s binary level (0 or 1) and not to its actual voltage Assoc Prof Nguyen Thanh Hai HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering Introduction Limitations of Digital Techniques -The real world is mainly analog: Most physical quantities are analog in nature such as velocity, temperature, liquid level, flow rate etc -One analog system uses only inputs and outputs to monitor - Input-output conversion Measuring device Temperature (Analog) Analog-to- (Digital) digital converter (Digital) (Analog) Assoc Prof Nguyen Thanh Hai Digital processing Digital-toanalog converter (Analog) Controller Adjust temperature HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering Introduction Some Devices/Equipments Digital circuit Assoc Prof Nguyen Thanh Hai HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering Introduction Some Devices/Equipments Analog circuit Digital circuit Computer, LCD TV, Digital or analog ? Digital or analog ? Assoc Prof Nguyen Thanh Hai HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering Introduction Biomedical appliances X-ray machine CT scanner or MRI CT scanner or MRI Ear thermometer Assoc Prof Nguyen Thanh Hai X-ray machine Ultrasonic machine HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering Introduction Household appliances Projector Car Laptop Air conditioner Player system Assoc Prof Nguyen Thanh Hai 10 HCMC University of Technology and Education Introduction Faculty of Electrical & Electronic Engineering Telecom appliances Mobile phone Telephone exchange Fax machine Assoc Prof Nguyen Thanh Hai PABX and telephone Cordless phone 11 HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering Introduction Stepper motor driver 12 Assoc Prof Nguyen Thanh Hai HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering Introduction Scanned keypad encoder 13 Assoc Prof Nguyen Thanh Hai HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering Example 1: Example 2: Solution: Convert to decimal 110002 212 - Assoc Prof Nguyen Thanh Hai 14 HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering 2.8 Applications Application 1: A typical CD-ROM can store 650 megabytes of digital data Since mega = 220, how many bits of data can a CD-ROM hold? Solution: 650 x 220 x = 5,452,595,200 bits 15 Assoc Prof Nguyen Thanh Hai HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering 2.8 Applications Application 2: A small process-control computer uses octal codes to represent its 12-bit memory addresses Solution: a How many octal digits are required? a 12/3 = b What is the range of addresses in octal? b 00008 to 77778 c How many memory locations are there? c With octal digit, 84= 4096 16 Assoc Prof Nguyen Thanh Hai HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering Application 3: A typical PC uses a 20-bit address code for its memory locations Solution: a How many hex digits are needed to represent a memory address? a 20/4 = hex digits b What is the range of addresses? b 0000016 to FFFFF16 c What is the total number of memory locations? c With hex digits, 165= 1,048,576 17 Assoc Prof Nguyen Thanh Hai HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering Application 4: Most calculators use BCD to store the decimal values as they are entered into the keyboard and to drive the digit displays Solution: a If a calculator is designed to handle 8-digit decimal numbers, how many bits does this require? a x = 32 bits b What bits are stored when the number 375 is entered into the calculators? b 37510 converts to 0011 0111 0101 (BCD) 18 Assoc Prof Nguyen Thanh Hai HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering Parallel transmission between two computers with bits 19 Assoc Prof Nguyen Thanh Hai HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering Series transmission between two computers Assoc Prof Nguyen Thanh Hai 20 ... Faculty of Electrical & Electronic Engineering Digital Systems Chương 1: Giới Thiệu Mã Chương 2: Đại Số Bool Cổng Logic Chương 3: Logic Tổ Hợp Chương 4: Logic Tuần Tự Chương 5: Họ TTL-CMOS Chương 6: