| 摘要 |
The present invention relates to the operation of an accessory device, and especially disclosed are an accessory device for supporting hierarchical connection, a system including the accessory device, a terminal, and other accessory devices, and an accessory operating method, wherein the accessory device comprises: a terminal connection interface for connecting to the terminal; at least one connection interface for connecting to at least one other accessory device; and a device controlling unit for controlling the setting of the device to recognize the resistance value corresponding to the specific accessory device depending on whether the other accessory device is connected. [Reference numerals] (241) ID switch; (271) First switch; (282) Protecting device; (407) Device controlling unit |
