What is the bus division in a microcomputer system?

Multi-** display software] input and output interface buses for microcomputer systems.

The three types of buses are data bus, address bus, and control bus.

1. "Data Bus DB" is used to transmit data information. The data bus is a bidirectional three-state bus, that is, it can not only transfer data from the CPU to other components such as memory or I-O interfaces, but also transfer data from other components to the CPU.

2. "Address Bus AB" is specially used to transmit addresses, because the address can only be transmitted from the CPU to the external memory or IO port, so the address bus is always one-way tri-state. For example, if the address bus of an 8-bit microcomputer is 16 bits, the maximum addressable space is 2 16=64KB.

3. "Control bus CB" is used to transmit control signals and timing signals. Among the control signals, some are sent by the microprocessor to the memory and IO interface circuits, such as read and write signals, chip selection signals, interrupt response signals, etc.; There are also other components that are fed back to the CPU, such as: interrupt request signal, reset signal, bus request signal, device ready signal, etc.

Therefore, the transmission direction of the control bus is determined by the specific control signal, which is generally bidirectional, and the number of bits of the control bus should be determined according to the actual control needs of the system.

Data bus, address bus and control bus.

Databus: Transfers data back and forth between the CPU and RAM that needs to be processed or stored.

Controlbus: Transmits signals from the microprocessor control unit (ControlUnit) to peripheral devices.

Extended information: Computer system refers to computer hardware, software and network systems used for database management.

Database systems require a large capacity of primary memory to store and run operating systems, database management system programs, applications, databases, directories, system buffers, etc., while secondary memory requires a large capacity of direct access devices. In addition, the system should have strong network capabilities.

A computer system consists of a hardware (sub)system and a software (sub)system. The former is an organic combination of various physical parts composed of electricity, magnetism, light, machinery and other principles, and is the entity on which the system works. The latter are procedures and documents that are used to direct the work of the whole system in accordance with the specified requirements.