USB Identification Pin Switching for 1-Wire Accessory Detection

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Solution Overview

Problem

Existing portable electronic devices face challenges in correctly detecting and identifying accessory devices and communicating with them effectively due to varying communication capabilities.

Innovation Solution

A portable electronic device equipped with a universal serial bus (USB) connector and a processing unit that uses an identification pin to detect and identify accessory devices, and switches to enable 1-wire communication when supported, allowing for communication and operation parameter management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a universal serial bus connector is used to connect accessory devices, then the device can support multiple accessory types and communication protocols, but it becomes difficult to correctly detect and identify the specific accessory device and its communication capabilities

Engineering Contradiction:

Improvesupport for multiple accessory typesVSAvoiddetection and identification of accessory device

Core Design Contradiction:

Adaptability or versatilityVSDifficulty of detecting and measuring

Solution Approach 1:

The USB connector is segmented into multiple functional pins, with the identification pin specifically dedicated to accessory detection and identification. This segmentation allows the system to separate the identification function from other USB functions (power, data), enabling reliable accessory detection while maintaining support for multiple accessory types through the standard USB interface.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If the identification pin is used for both traditional USB functions and 1-wire communication, then communication capability with 1-wire accessories is enabled, but the switchable coupling configuration adds device complexity

Engineering Contradiction:

Improve1-wire communication capabilityVSAvoidswitchable coupling configuration

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The identification pin's coupling configuration is made dynamic and switchable rather than fixed. The processing unit can selectively couple the identification pin to different receiving terminals based on the detected accessory type and communication protocol requirements. This dynamic reconfiguration enables the system to adapt between traditional USB functions and 1-wire communication, supporting multiple protocols without requiring separate dedicated pins for each function.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS9268728B2Portable electronic device and accessory device thereof, and operating method for the portable electronic device

Publication Date: 2016.02.23 HTC CORP

AI summary

A portable electronic device and an accessory device thereof, and an operating method for a portable electronic device. According to the disclosure, an accessory device coupled at a universal serial bus connector of a portable electronic device is detected and identified via the identification pin of the universal serial bus connector. When it is identified that the accessory device supports 1-wire communication via the identification pin, the accessory device is accessed via the 1-wire communication via the identification pin.