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Micro USB如何辨識2線/4線/5線

Sep 5th 2013, 22:49

網路文章片段=>廠商為降低成本會以銅包鋼或銅包鈻的導體來當純銅綫; USB 2.0線材有分兩線、四線、五線，兩線就是只有Vcc跟Gnd，其他空掉 ; 四線的加上D+及D-，五線的加上ID; 原廠的充電器內部有短路（D+跟D-短路），因此你如果用兩線的線材，手機偵測不到短路，會當作一般USB充電，充電值400~500mA, 只能慢充; 如果用四線或五線的，搭配原廠充電器，手機就會辨識充電，充電值可達800mA~1A, 充電速度快!

我的手機S3.我只能用原場附的MICRO USB線~才能連接電腦與充電.
如果我用另外買ㄉMICRO USB線~都只有充電功能(連不到電腦)
所以我想應該是差在2線或4/5線...
那在外購買線時...洞小又有包裝...有辦法直接辨識ㄇ

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