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发帖数: 13752 | 1 【 以下文字转载自 PDA 讨论区 】
发信人: digua (姚之FAN), 信区: PDA
标 题: Re: 果子牛大发，charging cable用了auth chip
发信站: BBS 未名空间站 (Mon Sep 24 20:10:42 2012, 美东)
这个网评看起来很欢乐啊。楼上的一些评论也很欢乐。
"This could mean that it's less nefarious than a authentication system, that
it's just for power regulation - but it looks like a serious
microcontroller of some sort, it doesn't look like a garden variety voltage
regulator that I've ever seen. It has a mirror-finish shiny metal exterior
with lasered numbers on it, it does not look like a generic black IC. If it
really costs $3.50 for a lightning plug, then it could be something quite
high tech. Whatever it is, it's expensive and highly miniaturized. And the
cable isn't going to function without it, that I can tell at this point."
按苹果的说法，lightning接口是全数字接口，每个引脚对应一个信号。
USB是用两个数据引脚来传送一个差分信号。USB信号不可能直
接送到lightning接口上，就象USB不能直接和普通的数据总线相联。
那个microcontroller应该是用来在lightning之间和USB之间做数据转换的。
它把lightning上来往的数据，转换成USB数据包。 |
