Importance

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Abstract

An information feedback method can include: transmitting, by a master device, an instruction to acquire specific information, where each of a plurality of slave devices when receiving the instruction serves as the current slave device; configuring the current slave device in the communication link in the first mode to receive the instruction from the master device or a previous slave device, and forwarding the instruction to a next slave device; connecting input port SDI and output port SDO of the current slave device by controlling the current slave device in the second mode to form a first pathway; determining, by the current slave device, whether the specific information is present in the current slave device to obtain a corresponding determination result; and then selectively configuring, by the current slave device, a potential of the first pathway of the current slave device to be at a first level.

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First Claim