Home > categories > Telecommunications > Fiber Optic Equipment > Devices communicate via buses. What types of buses do they have?
Question:

Devices communicate via buses. What types of buses do they have?

Devices communicate via buses. What types of buses do they have?

Answer:

According to whether the clock signal is independent, it can be divided into synchronous bus and asynchronous bus. The clock signals of the synchronous bus are independent of the data, while the clock signals of the asynchronous buses are extracted from the data. SPI and I2C are synchronous serial buses, and RS232 adopts asynchronous serial bus.
According to the way of data transmission, it can be divided into serial bus and parallel bus. In serial bus, the binary data is transmitted to the destination device bit by bit through a data line. The parallel bus usually has more than 2 data lines. The common serial buses are SPI, I2C, USB and RS232.
The bus system, the bus said in the usual sense, and generally contains three kinds of different functions of the bus, the data bus DB (Data Bus), AB (Address Bus) address bus and control bus CB (Control Bus). In some systems, the data bus and the address bus are multiplexed, i.e., the signals at some point in the bus represent the data, while others represent the addresses at any time, while some systems are separate. The address bus and data bus of the 51 series singlechip are multiplexed, while the buses in the general PC are separated.
Bus according to the function and specification can be divided into three types: (1) (Chip Bus, C-Bus chip bus) bus is also called the component level, various chips are connected together to form a specific function module (CPU module) of the information transmission channel. (2) I-Bus Bus (Internal), also called system bus or board level bus, is the information transmission channel between the plug-in units (modules) in the microcomputer system. For example, the transmission path between the CPU module and the memory module or the I/O interface module. (3) external bus (External Bus, E-Bus) is also called the communication bus, the microcomputer system or between computer system and other systems (instruments, instrumentation and control devices etc.) path between the transmission of information, such as EIA, RS-232C, IEEE-488 and so on.

Share to: