Arbiter and method for arbitrating high-performance bandwidth system bus and bus system having arbiter

The present invention relates to a bus system and a control method for improving the slave access bandwidth. Bus system according to the present invention include a system bus, a plurality of bus masters, a plurality of slaves, and arbitration. Bus system is expected to be approved provided the bus ownership to all bus masters, at least if you from one bus master requests for the use of the system bus, the arbiter requested. Bus master are approved by outputting the driving information, and group arbitration, arbiter by using the state information of the driving information and slave actually arbitration so that the data transfer occurs between a bus master and slave request to use the system bus. According to the invention, by thus it operates as if obtained the bus use causes all bus masters requesting a bus use previously acquired the necessary driving information previous arbitration, to ensure that the data access optimization during arbitration improves the bandwidth of the system bus. Bus system, arbiter, the bus master, slave, SDRAM, bank interleaving