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PCI bridge with improved structure

A main controller, multi-command technology, applied in the direction of instruments, electrical digital data processing, etc., can solve the problems of single function, low circuit efficiency, slow data transmission speed, etc.

Inactive Publication Date: 2005-03-02
NATIONZ TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a PCI main bridge with an improved structure that satisfies the requirements of high transmission efficiency, simple circuit design, and low cost at the same time, to overcome the problems in the prior art that the circuit is repeated, the function of each circuit is too single, The disadvantages of low circuit efficiency, or too much useless cycle overhead, low circuit efficiency, and slow data transmission speed

Method used

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  • PCI bridge with improved structure
  • PCI bridge with improved structure
  • PCI bridge with improved structure

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Embodiment Construction

[0010] Below in conjunction with accompanying drawing, the present invention is further described:

[0011] figure 1 It is a structural block diagram of the PCI main bridge. Including the following parts: PCI master controller; PCI host bridge internal cache FIFO, used to store command and control information from the system bus; system bus slave device; PCI slave device; internal registers, used to store internal control and status information; system The bus master is used to complete the read and write operations of the external devices on the PCI bus to the memory on the system bus; the PCI bus; the system bus; the external bus arbiter of the PCI main bridge is used to control the distribution bus. The PCI master controller mainly completes the CPU’s reading and writing operations on the external devices on the PCI bus through the system bus. When the CPU reads and writes external devices, the system bus slave device sends the first address of the external device to the F...

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Abstract

The invention discloses an improved structure of PCI main bridge in computer area. The PCI main controller in the mainbridge includes PCI main controlling unit, multiplex selector, internal arbitration circuit and 'Or' gate. Several instruction parts share the PCI main control unit. For each instruction part, a relevant group of FIFO is provided for exchanging the time sequence. Output data of each group of FIFO enter the input end of PCI main control unit through the multiplex selector, then passing through the output of multiplex selector that is controlled by the internal arbitration circuit. The invention possesses merits of high transmission efficiency, simple circuit and low cost.

Description

technical field [0001] The invention relates to an electrical digital data processing device, in particular to data exchange between computer peripheral equipment and a central processing unit. Background technique [0002] As computers are more and more widely used in various fields, the performance and calculation speed of computers are getting more and more attention. Among the various factors that affect the speed and efficiency of computers, the data between CPU, memory and external devices The exchange process is a very important element. Usually, in the system, an internal system bus connects the CPU and the memory together, and a PCI bus connects various external devices together, while the internal system bus and the PCI bus are connected by A PCI host bridge is connected. The PCI host bridge basically adopts dual ports, one end is connected to the internal system bus, and the other end is connected to the PCI bus. The PCI main bridge can be used as the master devi...

Claims

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Application Information

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IPC IPC(8): G06F13/14
Inventor 刘华预林家军郭小强王良清
Owner NATIONZ TECH INC
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