UNIT II- Peripherals and Interfacing PIO 8255 The parallel input-output port chip 8255 is also called as programmable peripheral input-output port. The Intel’s 8255 is designed for use with Intel’s 8-bit‚ 16-bit and higher capability microprocessors. It has 24 input/output lines which may be individually programmed in two groups of twelve lines each‚ or three groups of eight lines. The two groups of I/O pins are named as Group A and Group B. Each of these two groups contains a subgroup of eight
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DM74LS47 BCD to 7-Segment Decoder/Driver with Open-Collector Outputs October 1988 Revised March 2000 DM74LS47 BCD to 7-Segment Decoder/Driver with Open-Collector Outputs General Description The DM74LS47 accepts four lines of BCD (8421) input data‚ generates their complements internally and decodes the data with seven AND/OR gates having open-collector outputs to drive indicator segments directly. Each segment output is guaranteed to sink 24 mA in the ON (LOW) state and withstand 15V in the
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resources are used as factor inputs in the production process. The interaction of the household and the input market begins when the mentioned factor inputs are offered to the input market. By then‚ Edna’s Footwear will buy the land‚ hire factory workers‚ gain capital from past employment‚ and the raw materials are bought as well to be used for the production of the shoes. The firm is where the production of the shoes takes place. The goods (shoes) are then brought to the output market and sold to the
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bottleneck Input-‐Output for 7-‐step process # 1 2 3 4 5 6 Mass reduction Loss yield Output Inflow (t/h) Input for 100 final output (multiplier) Bottleneck Comment Given in Appendix Given in Appendix Calculated as (1-‐Mass Reduction) * (1-‐Loss Yield) If the 2-‐Reactor is used at 100% (maximum)‚ 4h reaction time Process Inflow / Final Output Pre Heater
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Midterm 2 Report • Highest: 100 • Lowest: 45 • Average: 83 1 Chapter 7 Input/Output Input/Output Problems • Wide variety of peripherals – Delivering different amounts of data – At different speeds – In different formats • Slower than CPU and RAM • Need I/O modules Input/Output Module Input/Output Module • Interface to CPU and Memory • Interface to one or more peripherals Generic Model of I/O Module I/O Module Function • • • • • Control & Timing CPU
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decode four binary-coded inputs into one of sixteen mutually exclusive outputs when both the strobe inputs‚ G1 and G2‚ are LOW. The demultiplexing function is performed by using the 4 input lines to address the output line‚ passing data from one of the strobe inputs with the other strobe input LOW. When either strobe input is HIGH‚ all outputs are HIGH. These demultiplexers are ideally suited for implementing high-performance memory decoders. All inputs are buffered and input clamping diodes are provided
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ConstruCtion CellPhone-oPeRated land RoveR P RaghavendRa PRaSad and . K. SuSRam Rahul C onventionally‚ wireless-controlled robots use RF circuits‚ which have the drawbacks of limited working range‚ limited frequency range and limited control. Use of a mobile phone for robotic control can overcome these limitations. It provides the advantages of robust control‚ working range as large as the coverage area of the service provider‚ no interference with other controllers and up to twelve
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circuit that follows certain logical relationship between the input and output voltages. Therefore‚ they are generally known as logic gates — gates because they control the flow of information. The five common logic gates used are NOT‚ AND‚ OR‚ NAND‚ NOR. Each logic gate is indicated by a symbol and its function is defined by a truth table that shows all the possible input logic level combinations with their respective output logic levels. Truth tables help understand the behavior of logic gates
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Topic 3: Input Output Devices MULTIPLE CHOICE: 1-QWERTY.(d) 2-mouse.(b) 3-multitouch.(c) 4-scanners.(d) 5-MICR.(a) 6-microphone.(c) 7-contrast ratio.(b) 8-e-book readers.(a) 9-mobile DTV.(d) 10-ergonomics.(a) MATCHING: 1-toggle key.(i) 2-mouse.(e) 3-stylus.(h) 4-scanners.(g) 5-UPC.(j) 6-digital camera.(b) 7-dot pitch.(c) 8-active display area.(a) 9-plotters.(f) 10-MagicJack.(d) OPEN-ENDED 1-Input : is any data or instruction that are used by a computer. Input devices:
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EXERCISE 2.2 Exercises 2.2 and 2.3 involve you examining a range of input and output devices in order to understand how they influence interaction. A typical computer system is comprised of a QWERTY keyboard‚ a mouse‚ and a colour screen. There is usually some form of loudspeaker as well. You should know how the keyboard‚ mouse and screen work - if not‚ read up on it. What sort of input does the keyboard support? What sort of input does the mouse support? Are these adequate for all possible applications
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