| 摘要 |
PCT No. PCT/JP84/00425 Sec. 371 Date May 6, 1985 Sec. 102(e) Date May 6, 1985 PCT Filed Sep. 5, 1984 PCT Pub. No. WO85/01168 PCT Pub. Date Mar. 14, 1985.A data communication apparatus of a start-stop synchronizing system in which a bidirectional data communication between a master apparatus (10) and a slave apparatus (20) can be carried out through a single communication line (30). The transmission period of the master apparatus (10) and the transmission period of the slave apparatus (20) are formed as one block and this one block is repeated. Start signals X1 and X2 for use in transmitting and receiving data are transmitted only from the master apparatus (10). Since it is sufficient to provide a single communication line between the two apparatus, the construction of the system can be simplified.
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