Programming Techniques 1. Explain DAA instruction. Ans. It stands for ‘decimal adjust accumulator’. Execution of DAA instruction converts the content of the accumulator into two BCD values. The system utilises the AC flag (not accessible by the programmer, but is used internally for DAA operation) for this conversion by following the procedures stated below: (a) […]
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Posts by Farahat
8085 Interrupts
8085 Interrupts 1. Mention the interrupt pins of 8085. Ans. There are five (5) interrupt pins of 8085—from pin 6 to pin 10. They represent TRAP, RST 7.5, RST 6.5, RST 5.5 and INTR interrupts respectively. These five interrupts are ‘hardware’ interrupts. 2. Explain maskable and non-maskable interrupts. Ans. An interrupt which can be disabled […]
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Instruction Types and Timing Diagrams
Instruction Types and Timing Diagrams 1. What is an instruction? Ans. An instruction is a command given to the microcomputer to perform a specific task or function on a given data. 2. What is meant by instruction set? Ans. An instruction set is a collection of instructions that the microprocessor is designed to perform. 3. […]
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The 8085 Microprocessor
The 8085 Microprocessor 1. Draw the pin configuration and functional pin diagram of μP 8085. Ans. The pin configuration and functional pin diagram of μP 8085 are shown below: 2. In how many groups can the signals of 8085 be classified? Ans. The signals of 8085 can be classified into seven groups according […]
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Microprocessor, Microcomputer and Associated Languages
Microprocessor, Microcomputer and Associated Languages 1. On which model is based the basic architecture of a digital computer? Ans. The basic architecture of a digital computer is based on Von Neumann model. 2. What is meant by distributed processing? Ans. Distributed processing involves the use of several microprocessors in a single computer system. For example, […]
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AC motor What It Does,How It Works,Variants,Values,How to Use it and What Can Go Wrong
The distinction between AC and DC motors has become blurred as controllers for DC motors make increasing use of pulse-width modulation, which can be viewed as a form of alternating current. All motors that consume DC power are referenced in the DC motor section of this encyclopedia, regardless of whether they modulate the power internally. […]
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DC motor What It Does,How It Works,Variants,Values,How to Use it,What Can Go Wrong
In this section, the term “traditional DC motor” is used to describe the oldest and simplest design, which consists of two brushes delivering power via a rotating, sectioned com mutate to two or more electromagnetic coils mounted on the motor shaft. Brushless DC motors (in which DC is actually converted to a pulse train) are […]
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diode What It Does,How It Works,Variants,Values,How to Use it and What Can Go Wrong
The term diode almost always means a semiconductor device, properly known as a PN junction diode, although the full term is not often used. It was formerly known as a crystal diode. Before that, diode usually meant a type of vacuum tube, which is now rarely used outside of high-wattage RF transmitters and some […]
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field effect transistor What It Does,How It Works,Variants,Values,How to Use it and What Can Go Wrong
The term field-effect transistor encompasses a family primarily consisting of the junction field-effect transistor (or JFET, which is the simplest generic type) and the metal-oxide semiconductor field-effect transistor (or MOSFET, also sometimes known as an insulated- gate field-effect transistor, or IGFET). Because the principles of operation overlap considerably, the entire -FET family is grouped in […]
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bipolar transistor What It Does,How It Works,Variants,Values,How to Use it and What Can Go Wrong
The word transistor, on its own, is often used to mean bipolar transistor, as this was the type that became most widely used in the field of discrete semiconductors. However, bipolar transistor is the correct term. It is sometimes referred to as a bipolar junction transistor or BJT. What It Does A bipolar transistor amplifies […]
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