Priority Interrupt . Priority interrupt is one of the methods of data transfer from CPU to peripheral devices Data is transferred from CPU to I/O devices on the initiation of CPU. But‚ the CPU cannot start the transfer unless the device is completely ready for communication with the CPU. The readiness of the device is checked only by the interrupt given by the device. The CPU responds to the request by storing the returned address from PC into the memory stack. Then the next job is of program to
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CHAPTER 1: INTRODUCTION TO INTERRUPTS 1.1 What Is An Interrupt? Before we move into a detailed study of the 8085 Interrupts we must at first get an idea about what an Interrupt is. Looking at the literal meaning of interrupt‚ one can say that interrupting something or someone is stopping the thing or person from their normal course of action. This is the same in the case of a microprocessor too. The Intel 8085 microprocessor has this feature called the Interrupt which enables the user
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[pic] [pic] STUDY OF SOLAR POWERD VEHICLE SEMINAR REPORT SUBMITTED BY JEEVAN ABRAHAM 090111127023 In partial fulfillment of the requirements for the award of the degree Of BACHELOR OF ENGINEERING In MECHANICAL ENGINEERING TAMIL NADU COLLEGE OF ENGINEERING COIMBATORE-641659ANNA UNIVRSITY: CHENNAI 600 025 APRIL 2012
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Wolmer’s Trust High School for Girls CAPE COMPUTER SCIENCE Grade 11 Teacher: Mrs. McCallum-Rodney Operating System Function – PROCESS MANAGEMENT Introduction to Process Management • A process does nothing unless its instructions are executed by the CPU. • A process can be thought of as a program in execution. • A process needs certain resources‚ including CPU time‚ memory‚ files and I/O devices‚ to accomplish its tasks. These resources are either given to the process
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HAND GLOVE MOUSE here we designed and built a wireless computer pointing device with accelerometer based movement control. Our implementation allows the user to wear a set of hardware (a glove and connected armband) and control a cursor through different hand orientations and finger presses. Users can operate their computers with their hands in midair without the hassle of desks surfaces or wires. The motivation for this project was to create an intuitive glove-based pointing device for multiple
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POWER SAVER FOR ADVERTISEMENT HOARDINGS USING RTC In this competitive world human cannot spare his time to perform his daily activities manually without any fail. The most important thing he forgets is to switch off the room lights wherever not required. With this‚ even the power will be wasted up to some extent. This can be seen more effectively in the case of commercial sign boards. This project gives the best solution for electrical power wastage. Also the manual operation is completely eliminated
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and outputs 1.8 Accessing programmable digital blocks 1.9 Global input lines 1.10 Digital programmable blocks 1.11 Analog programmable blocks 1.12 Referent voltage generators 1.13 Switch mode pump 1.14 MAC 1.15 Decimator 1.16 I2C controller 1.17 Interrupt controller 1.18 Address space Introduction When developing more complex projects‚ there is often a need for additional peripheral units‚ such as operational and instrument amplifiers‚ filters‚ timers‚ digital logic circuits‚ AD and DA convertors
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Threshold time for sensor is set. When a vehicle passes on road ‚ sensor placed underneath the road starts sensing the vehicle. If condition prevails for more than threshold time‚ interrupt signal from the sensor is sent to microcontroller. Microcontroller detects and services the interrupt. Display messages are stored in interrupt service routine. Microcontroller sends corresponding message to alert congestion to GSM modem. The message is also displayed on LCD display. GSM modem transmits the message in
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20 Fig 3.10 Gear Motor - Helical Gear……………………………………..……………….………21 Fig 3.11 LCD Display……………………………………………………………………………22 Fig 4.1 Circuit Diagram………………………………………………………...……….……….26 Fig 4.2 Led Connections…………………………………………………………………………27 Fig 4.3 External Interrupt Connections………………………..……………..…………………..28 Fig 4.4 Max 232 Connections…………………………………..………………………..………29 LIST OF TABLES Table 3.1 Different voltages………………………….………………………..……………………………6 Table 6.1 Data types……………………………………………………………………………………….34 Table 6.2 Memory
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Coordinating the Machine’s Activities One of the most fundamental concepts of modern operating systems is the distinction between a program and the activity of executing a program. The former is a static set of directions‚ whereas the latter is a dynamic activity whose properties change as time progresses. The activity of executing a program under the control of the operating system is known as a process. Associated with a process is the current status of the activity‚ called the process state
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