| 摘要 |
PURPOSE:To improve the efficiency of data communication by providing a response generating section and a response analysis section to a transmission and reception buffer of a communication processor receiving a transmission command from a data processor so as to detect earlier collision between the transmission and reception of data while using various flags. CONSTITUTION:A data processor 16 transmits a transmission command to a transmission data buffer 3 of a communication processor, sets a command end waiting flag 5 and a data transmission waiting flag 6 at the START and the data transmitted to the buffer 3 is transmitted from a transmission section 1 to a transmission line 17. When the data from an opposite party is inputted to a reception buffer 4 via a reception section 2, it is informed to the processor 16 through a DVR line on the condition that the flag 5 is not set, the data reception flag 9 is set to allow the processor 16 to fetch a reception data. A response generating section 10 and a response analysis section 11 are provided to the transmission section 1 and reception section 2, a data collision flag 8 is set to detect earlier the collision between the data transmission and reception thereby improving the efficiency of data communication. |
