iPhone 15 使用 USB 2.0 的原因

原文连接

原文: Exactly how Apple is implementing USB on the cheaper handset isn't clear. However, the fact it's limited to USB 2.0 speeds, and that the legacy Lightning interface likewise tops out at the same 480Mbps, makes sense in the context of the absent USB controller. Very likely, there's some kind of conversion going on between the new USB-C connector and the old Lightning controller, limiting the former to the latter's peak bandwidth.

翻译: 苹果究竟是如何在更便宜的手机上实现 USB 的尚不清楚。然而，它仅限于 USB 2.0 速度，并且传统的 Lightning 接口同样以相同的 480Mbps 达到最高，在没有 USB 控制器的情况下是有意义的。很可能，新的 USB-C 连接器和旧的 Lightning 控制器之间正在进行某种转换，将前者限制为后者的峰值带宽。

感觉可能主要是芯片原因导致的,明年 16 应该就是 USB 3.0 的传输速度了