公开(公告)号：US20140075054A1

公开(公告)日：2014-03-13

申请号：US14077115

申请日：2013-11-11

Applicant: Apple Inc.

Inventor： Gregory T. Lydon ,  Lawrence G. Bolton ,  Anand Dalal

IPC: G06F13/38

CPC classification number: G06F13/387 ,  G06F13/385

Abstract: A portable communication device (PCD) can automatically switch into different operating modes of an asymmetric communication protocol (such as USB) depending on the type of accessory connected. For example, the accessory can signal whether the PCD should operate in a first mode or a second mode using a hardware indicator such as identification resistor across two pins of a multi-pin connector and/or a software indicator such as a command protocol. The PCD can detect the accessory's signal and switch to the operating mode requested by the accessory.

Abstract translation: 便携式通信设备（PCD）可以根据连接的附件的类型自动切换到不对称通信协议（例如USB）的不同操作模式。 例如，附件可以使用诸如多针连接器的两个引脚之类的诸如识别电阻器的硬件指示器和/或诸如命令协议的软件指示器来指示PCD是否应该以第一模式或第二模式操作。 PCD可以检测附件的信号并切换到附件要求的操作模式。