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Interface device

阅读:15发布:2022-11-06

专利汇可以提供Interface device专利检索,专利查询,专利分析的服务。并且PURPOSE:To improve the processing capability of a system by decreasing the time when an interface device occupies a system bus and reducing the number of switching times of bus use right. CONSTITUTION:Line memories 9-11 are controlled by a DMA controller 13, and the device is controlled to any one of data storage operation from the system bus, data read operation to a laser printer 4 or no operation by using control signal lines 19, 20, 21. A DMA controller 13 reads the picture data of the 1st line from a bit map memory 2 and stores it in the line memory 9. Then the memory control signal lines 19, 20 receive a signal and the picture data of the 2nd and 3rd line is stored respectively in the line memories 10, 11 in synchronizing with the leading of a transmission unblank signal. Then the picture data storage is conducted to one line so as to decrease the time for occupying the system bus 5.,下面是Interface device专利的具体信息内容。

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