What Is a Processor Bus?
The CPU bus is the fastest bus in a PC system and the core of the chipset and motherboard. This bus is mainly used by the CPU to transfer information to and from the cache, main memory, and North Bridge (or MCH).
CPU bus
Right!
- Chinese name
- CPU bus
- Foreign name
- CPU bus
- The CPU bus is the fastest bus in a PC system and the core of the chipset and motherboard. This bus is mainly used by the CPU to transfer information to and from the cache, main memory, and North Bridge (or MCH).
- The CPU bus, also known as FSB (Front Side Bus), is the fastest bus in a PC system and the core of a chipset and motherboard. This bus is mainly used by the CPU to transfer information to and from the cache, main memory, and North Bridge (or MCH). The CPU bus currently used in PC systems that can be seen operates at 66, 100, 133, or 200 MHz and is 64 bits (8 bytes) wide.
- It is customary that the local bus directly related to the CPU is called a CPU bus or an internal bus, and the local bus connected to various general expansion slots is called a system bus or an external bus. Specifically, the CPU bus generally refers to a common connection line between a CPU and a chipset, also called a front-side bus (FSB). Whether it is a bus or a local bus, an internal bus, or an external bus, they are all put forward to give play to the comprehensive efficiency of the computer. We can understand them as the main roads and general roads in the city.
1. The function of the CPU bus Generally, the bus can be divided into three types: data bus, address bus, control bus, of course, this is also suitable for the CPU bus. In a microcomputer, the CPU acts as the bus master, sends control signals to each component through the control bus, and uses the address bus to specify the components it needs to access using address signals, such as memory and data buses to transmit data information. The data bus is bidirectional That is, data information can be transmitted from the CPU to other components (write), and also from other components to the CPU (read). The CPU bus is between the chipset and the CPU, and is responsible for the communication between the CPU and all external components, because the CPU communicates with each component through the chipset. In addition, the CPU bus is also responsible for the communication between the CPU and the Cache. As mentioned earlier, the CPU bus is like a trunk road. Data and signals flow from this trunk road to various components and external devices, and also flow back to the CPU (mainly data) from each component.
2.CPU bus control and communication The clock frequency on the CPU bus is usually the FSB frequency that we often say. The currently used FSBs are three types: 66MHz, 100MHz and 133MHz. Although AMD s K7 series CPU also uses a 100MHz FSB, its EV6 CPU bus uses DDR (a clock pulse to transmit data twice) technology to enable data transmission between the CPU and the chipset to be performed at a 200MHz clock. The data transmission efficiency can reach up to 1600MB.