| 摘要 |
In a system including a plurality of modules coupled together by a network with a protocol governing communication between the modules, when a module is to be reset it sends a signal to the modules to which it is connected requesting permission to reset. A module receiving a permission request signal completes any communication in progress with the module originating that signal, possibly using short cuts to complete the communication, and then issues a permission granted signal. When it has received permission granted signals from all of the modules to which it sent permission request signals the first-mentioned module is reset. A module connected in a chain of modules may have means for storing an indication that a permission request signal has been received but not answered, so that if the particular module is reset at that time a permission granted signal can be issued after the module is reset. Alternatively, the permission request signal is applied continuously or repeatedly until a permission granted signal is received. <IMAGE> |
