公开(公告)号：US20160154446A1

公开(公告)日：2016-06-02

申请号：US15004740

申请日：2016-01-22

Applicant: APPLE INC

Inventor： Scott Mullins ,  Alexei Kosut ,  Jeffrey J. Terilizzi

IPC: G06F1/26

CPC classification number: G06F1/26 ,  G06F1/266 ,  G06F1/3203 ,  H02J7/0021 ,  H02J7/0029 ,  H02J2007/0001 ,  H02J2007/0096 ,  H04M1/72527

Abstract: Methods, systems, and apparatus for enabling a power path between a power source and a host device via an accessory. A host device may send, to an accessory arranged within the power path, via a first data pin arranged in the host device, a request for an accessory identifier. The accessory identifier identifies the accessory. The host device may then determine whether the accessory identifier is received from the accessory within a specified period of time or whether a received accessory identifier is valid. If the accessory identifier is not received from the accessory within the specified period of time, or a received accessory identifier is not valid, the host device sends a new request for the accessory identifier to the accessory via a second data pin different than the first data pin.