Arbitration device and arbitration method thereof

Abstract

The present invention provides an arbitrator and its arbitration method. The main equipment in the bus system can be divided into important main equipment and secondary main equipment. Said arbitrator has first and second stage arbitration modules, in which the second stage arbitration module can be used for arbitrating bus service request sent by secondary main equipment, and the first stage arbitration module can be used for arbitrating the arbitrated result of the second stage arbitration module and the bus service request sent by important main equipment together, so that the different arbitration opportunities can be set up according to different bus service request grades so as to raise arbitration efficiency and bus service efficiency.

Description

technical field [0001] The invention relates to an arbiter and an arbitration method, in particular to an arbiter and an arbitration method which are applied in a multi-device system to quickly and effectively arbitrate the bus use requests sent by each device, thereby improving bus efficiency. Background technique [0002] The rapid development of semiconductor production technology has greatly promoted the development of integrated circuit design industry, especially the emergence of deep submicron technology in semiconductor production technology has pushed single-chip system design to the forefront of integrated circuit design. Single-chip system technology is to integrate multiple processors that were previously scattered on multiple different chips on the same chip to form a complete system with complete functions and optimized performance. Compared with the multi-chip system, the physical area and package pins of the single-chip system are greatly reduced, so that the...

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Problems solved by technology

However, this kind of out-of-order return of read data may also cause different slave devices to use the bus to release the read data at the same time, thus causing conflicts between read data when returning

This will increase the access delay and reduce the efficiency of the bus

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