| 摘要 |
PURPOSE:To send data at a high speed to an eraser with a small number signal lines and to improve reliability and accuracy by switching to I/O interface mode only at the time of transmission of data to the eraser by a serial asynchronous system. CONSTITUTION:When data addressed to a block B is sent from a TXD in the serial asynchronous system from a control block B relating to sequence and operation, the block B uses a serial data input terminal PC1 of a microcomputer 31 to receive the data. When the reception is finished, the data is sent from a serial data output terminal PC0, the block A uses the PC1 to receive it. After the reception of data of the block A from the block B, in the timing of data transmission to the eraser, the mode is switched to the I/O interface mode and the data is sent by 8 bytes to the eraser control block C. The mode is switched again into the asynchronous mode after the end and the data to the block B is sent. Thus, the data transmission to the eraser is attained at a high speed with a small number of signal lines and the reliability and accuracy are improved. |
