| 摘要 |
PURPOSE:To improve the responsiveness to reception error by extracting a reception error signal from reception data and discriminating the presence or the absence of reception error based on only this reception error signal. CONSTITUTION:An error processing part 9 extracts the reception error signal (error flag) from serial data transmitted from a shift register 35 to a shift register 10 to discriminate the presence or the absence of reception error on the operation part side; and if reception error exists, an error signal is outputted to an address order control part 8. That is, the reception error signal indicating the presence or the absence of reception error is added to transmission data to the main control part side from the operation part side, and the reception error signal is extracted from reception data from the operation part side by the main control part side, and the presence or the absence of reception error on the operation part side is discriminated by this reception error signal. Thus, the probability of erroneous retransmission of data or a failure of required retransmission is reduced. |
