BUS INTERFACE SYSTEM, INTEGRATED CIRCUIT DEVICE, AND BUS INTERFACE METHOD

摘要

PROBLEM TO BE SOLVED: To provide a bus interface system, integrated circuit device, and bus interface method which can make data transfer between systems fast. ;SOLUTION: An opposite system 10 outputs bus data 96 by using a bus clock 92 supplied from its own system 20. A 1st buffer 32 buffers an internal clock 90 and outputs a bus clock 92 to the opposite system 10, a 2nd buffer 34 buffers the bus clock 92 and outputs a fetch clock 94 to a DFF 38, and a 3rd buffer 36 buffers the bus data 96 and outputs fetch data 98 to the DFF 38. The DFF 38 fetches the fetch data 98 by using the fetch clock 94. Consequently, the setup time of the DFF 38 can be optimized. Buffers includes in an input and buffer cell are preferably the 1st buffer 32 and 2nd buffer 34.;COPYRIGHT: (C)1997,JPO