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Yoctopuce plug is the public communication backbone for transmitting information between various functional components of a computer. It is a transmission bundle composed of wires. According to the types of information transmitted by the computer, the computer bus can be divided into data bus, address bus, and control bus, which are used to transmit data, data addresses, and control signals respectively. The bus is an internal structure; it is the common channel for cpu, memory, input, and output devices to transmit information. The various components of the host are connected via the bus, and external devices are connected to the bus through corresponding interface circuits, thereby forming the computer hardware system. In a computer system, the public path for transmitting information between components is called the bus. Microcomputers connect various functional components using a bus structure.

Yoctopuce plug principle

The bus is a shared data transmission device. Although multiple devices can be connected to the bus, typically only one pair of devices participates in data transmission at any given time. According to the form of information transmission, buses can be divided into parallel buses and serial buses. A parallel bus transmits n bits of binary information simultaneously using n transmission lines. Its characteristics include high transmission speed, but the system structure is more complex; it is used for connections between components within a computer system. A serial bus shares a single transmission line for multi-bit binary information, with bits passing through the bus in chronological order. Its characteristics include a simple structure, but slower transmission speed. The bus must have clear specifications: bus timing protocols, meaning certain timing rules must be followed when transmitting information on the bus, such as synchronous bus timing, asynchronous bus timing, and semi-synchronous bus timing. The physical characteristics of the bus include the electrical characteristics of signals, power, and addresses, as well as the mechanical characteristics of wiring and connectors. Bus bandwidth is the maximum transmission rate achievable by the bus, with the unit being MB/S.

Yoctopuce plug type

1) 232-C is a serial physical interface standard established by the American EIA (Electronic Industry Association). RS is the abbreviation for "Recommended Standard," 232 is the identifier number, and C indicates the revision number. The RS-232-C bus standard has 25 signal lines, including a main channel and an auxiliary channel. In most cases, the main channel is primarily used. For general full-duplex communication, only a few signal lines are required, such as one transmit line, one receive line, and one ground line. The RS-232-C standard specifies that the driver allows a capacitive load of 2500pF. The communication distance is limited by this capacitance. For example, when using a communication cable with 150pF/m, the maximum communication distance is 15m; if the capacitance per meter of cable decreases, the communication distance can increase. Another reason for the short transmission distance is that RS-232 uses single-ended signal transmission, which suffers from common ground noise and cannot suppress common-mode interference, so it is generally used for communication within 20m. 2) RS-485 bus: When communication distances range from tens of meters to over a kilometer, the RS-485 serial bus standard is widely adopted. RS-485 uses balanced transmission and differential reception, thus having the ability to suppress common-mode interference. Additionally, the bus transceiver has high sensitivity and can detect voltages as low as 200mV, allowing transmission signals to be recovered over distances beyond a kilometer. RS-485 operates in half-duplex mode, meaning only one point can be in the transmit state at any time; therefore, the transmit circuit must be controlled by an enable signal. RS-485 is very convenient for multi-point interconnection, saving many signal lines. Applying RS-485 allows networking to form distributed systems, permitting up to 32 drivers and 32 receivers to be connected in parallel.

Yoctopuce plug data exchange method

Data Bus (DataBus). It defines methods for data sharing and exchange in homogeneous and heterogeneous systems within large integrated application systems, serving as a standard for inter-system data exchange. It can be used to transmit information between microprocessors and memory, and between microprocessors and input/output interfaces. The width of the data bus is an important indicator determining computer performance. The data buses of microcomputers are mostly 32-bit or 64-bit. 1) Business entity data exchange: Each subsystem has a business entity layer in its architectural hierarchy. The data exchange mechanism establishes a layer transparent to all application systems at the business entity level. Regardless of the specific technical implementation, subsystems can share and interact through the business entity layer, establishing a structure for continuous integration and business expansion between subsystems, thereby realizing a scalable, complete, integrated information system. 2) WebService data exchange: This is a Web service standard. Web services provide solutions for sharing and exchanging data between heterogeneous systems and can also be used for data sharing and exchange using unified interface standards in product integration.

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