| 摘要 |
A data communication system has a host bus connected to a central processing unit and a system memory, a peripheral component interconnect bus connected to a communication device equipped with a first state machine and a second state machine independently requesting a right to use the peripheral component interconnect bus and a bus bridge circuit connected between the host bus and the peripheral component interconnect bus and having a first-in-first-out memory for data read-out, and the bus first-in-first-out memory for data write-in and another bridge circuit assigns the right to use the peripheral component interconnect bus to the second state machine so as to transfer write-in data codes through the peripheral component interconnect bus to the first-in-first-out memory for data write-in until completion of a data transfer from the system memory through the host bus to the first-in-first-out memory for data read-out, thereby improving the throughput of the peripheral component interconnect bus.
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