These Computer Organization & Architecture (COA) Unit 5 handwritten notes are specially designed for MCA students, strictly following the AKTU MCA syllabus. The notes are also highly useful for MCA students of CCSU, SCRIET, and other Indian universities.
Unit 5 explains how a computer system communicates with external devices, how data transfer is managed efficiently, and how the CPU handles multiple I/O operations using interrupts and direct memory access techniques. This unit is conceptual and scoring, with several questions frequently appearing in MCA exams.
🔍 Topics Covered in Unit 5 (As Per MCA Syllabus):
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Peripheral devices
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Input / Output interface
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I/O ports
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Interrupts and interrupt hardware
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Types of interrupts and exceptions
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Modes of data transfer
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Programmed I/O
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Interrupt-initiated I/O
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Direct Memory Access (DMA)
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I/O channels
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I/O processors
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Serial communication
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Synchronous communication
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Asynchronous communication
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Standard communication interfaces