| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem in a process of transferring data from an image processing circuit A to an image processing circuit B wherein the image data may be held in a write buffer in a bus bridge when the image processing circuit A completes transfer of data and notifies the fact to the image processing circuit B, so that the data read by the image processing circuit B may be invalid. SOLUTION: When a large number of masters are connected to one bus, the bus needs to be divided by a bus bridge, while the bus bridge is provided with means for determining a special command when the master 1 accesses a specific address in an unused region and returning the acknowledgment of the access to the master 1 after the data in a write buffer in the bridge disappears so that read does not precede write in transferring data between the masters across the bridge. COPYRIGHT: (C)2008,JPO&INPIT
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