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Understanding Data Transmission Modes: Simplex, Half-Duplex, and Full-Duplex Explained

Explore the crucial modes of data transmission: Simplex, Half-Duplex, and Full-Duplex. Learn how these modes operate through 2-wire and 4-wire systems, detailing the roles of transmitters and receivers. Discover the differences between parallel and serial data lines, and delve into the concepts of asynchronous and synchronous transmission. Understand the importance of clock dependency, idle lines, and key components like start bits, stop bits, and parity bits. This comprehensive overview will enhance your knowledge of communication modes essential for effective data transmission.

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Understanding Data Transmission Modes: Simplex, Half-Duplex, and Full-Duplex Explained

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Presentation Transcript

  1. Data Transmission

  2. Communication mode • Simplex 2-wires loop Tranmitter Receiver earth-return Tranmitter Receiver • Half-duplex 2-wires Tranmitter/ Receiver Tranmitter Receiver • Full-duplex Tranmitter/ Receiver Tranmitter Receiver 4-wires

  3. Parallel v.s. Serial data line parallel sender receiver data line serial sender receiver

  4. Serial Transmission Mode • Asynchronous transmission • clock independent • Synchronous transmission • clock dependent

  5. line idle line idle start bit stop bit parity bit 7-8 data bits 1-2 bits Time Direction of transmission Asynchronous Transmission

  6. SYN SYN DLE STX DLE DLE DLE DLE DLE ETX Synchronous Transmission : Character Oriented Synchronization : Bisync character synchronization start of frame data end of frame transmitted addtional stuff

  7. Synchronous Transmission : Bit Oriented Synchronization closing flag opening flag data 01111110 01111110 01111101101111100 addtional bit inserted

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