| 摘要 |
An image reading apparatus and method capable of allowing a memory that stores image data to be accessed by a plurality of data control units. The image reading apparatus includes a memory and a plurality of data sources. Further, a serial-to-parallel converter converts serial image data from a first data source into parallel image data. An input buffer latches the converted data. A first write mechanism writes a set of data latched in the input buffer into the memory, and a first read mechanism reads the set of data stored in the memory. An output buffer latches the set of the data read from the memory, and a data output mechanism outputs the set of the data in the output buffer, e.g. block by block and in sequence. A second write mechanism writes data from a second data source into the memory. A second write mechanism is selectively used with the first write mechanism, and a second read mechanism reads the set of the data in the memory and transfer the data to the second data source. The second read mechanism is selectively used with the first read mechanism. The first data control controls the first write and read mechanisms and the second data control unit controls the second write and read mechanisms.
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