| 摘要 |
<p>PROBLEM TO BE SOLVED: To guarantee the operation of a device and prevent normal processing from being interrupted without using any complicated expensive circuit such as an error detecting circuit even for a high speed bus. SOLUTION: In addition to control bus line 0/1 systems 106 and 107, a hot-line insertion and extraction bus line 108 is provided with a common bus dedicated to hot-line insertion and extraction, and the hot-line insertion and extraction bus line 108, a bus selection control line 119, and control bus line 0/1 systems 106 and 107 are stored in the long pin 112, intermediate pin 113, and short pin 114 of connectors 111 of controlled packages (1) 1000-(n) 118. When a package is inserted or extracted in hot-line mode, a switch 116 sends a switching signal for selecting the bus line to the bus selection control line stored in the intermediate pin and then when the bus is switched temporarily to the hot-line insertion and extraction bus line 108 which is noiseless when noise is superposed on the control bus lines 0/1 systems 106 and 107.</p> |
