| 摘要 |
PURPOSE:To attain processing in each word and to speed up the processing by combining two vertical/horizontal converting circuits with selectors validating the processing of these circuits. CONSTITUTION:When a transfer mode is an input raster scanning mode, data obtained through a data selector 11 are successively written in a direct buffer RAM 15 until the data for 8 lines are completely obtained. After obtaining the data for 8 lines, following input data are written in the other buffer RAM 15 and the already written data are read out from the former buffer RAM 15. The read data are inputted to the vertical/horizontal converting circuit 14, where vertical/horizontal conversion is executed every word. In case of an output scanning mode, the input data are vertically/horizontally converted every word. Thus, the raster scanning data can be obtained from the buffer RAM 15. |
