| 摘要 |
PROBLEM TO BE SOLVED: To efficiently transmit and receive data between a main body part and a display operation part. SOLUTION: A transfer unit in communication from a main body part 2 to a display operation part 3 is made different from a transfer unit in communication from the display operation part 3 to the main body part 2. More specially, a transfer unit (for example, 16 bytes) in communication from the main body part 2 to the display operation part 3 is larger than a transfer unit (for example, one byte) in communication from the display operation part 3 to the main body part 2. By this, a transfer unit in communication from the main body part 2 to the display operation part 3 is used as a transfer unit suitable for transmitting image data or the like, and a transfer unit in communication from the display operation part 3 to the main body part 2 is used as a transfer unit suitable for transmitting key-inputting signals or the like. COPYRIGHT: (C)2006,JPO&NCIPI
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