| 摘要 |
PURPOSE:To reduce the number of interfaces and to improve high integration and extension by using only one processing data transferring line between a processing device and a processing device and a processing requesting device to concentrate the line as a bus. CONSTITUTION:A processing requesting device 2 transfers processing data to a processing device 1 through a bus. After receiving the processing data, a transmitting/receiving circuit 4 in the processing device 1 starts a write/read/delete controlling circuit 6 and the processing data are registered in a holding buffer 5 in accordance with the air display of an idle/busy controlling circuit 7 in the holding buffer 5. When the data of retrieving conditions are displayed on a display circuit 9, the processing data selected by a priority selecting circuit 10 is transferred to a processing part 12 to be processed. When the number of processing data reaches the upper limit of the data enabled to be held in the holding buffer 5, a transfer inhibiting signal holding circuit 11 sends a signal for inhibiting the transfer of the processing data to a processing device to a processing requesting device 2. |
