Come funziona il cavo di illuminazione collegato in ogni modo?

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AppleLightninginterfaceisadaptive-thecontrollerchipdynamicallyassignpinsfunctionaccordingtopluggeddevice.

TheAppleLightningconnectorplugcanbeinsertedwitheithersidefacingup(theprocessorinsidetheplugdetectstheplug'sorientationandroutestheelectricalsignalstothecorrectpins).Twodifferentialpairlanes(L0p/nandL1p/n)mayswapinICofdeviceconnector(lanesdon'tswapifaccessoryidentificationchipconnecttoID0pin).

Da: Analisi dei sistemi del cavo Apple Lightning to USB

The BQ2025’s one data pin is connected to two Lightning cable pins. Why two? Recall that the Lightning cable is designed to work no matter which way it is inserted into the phone (USB anyone?). Some may call it lazy to not have to think when plugging something in, but we feel that it is a subtle improvement in usability that shows attention to detail.

The figure below shows the Lightning cable in two orientations (there’s a little white triangle on the diagram to help you visualize the rotation). The coloured lines indicate electrically equivalent pins. We know from our circuit board analysis that the BQ2025 connects to the black signal. Effectively then, the BQ2025 is connected to two Lightning cable pins. We’ve labelled them A1 and B5.

The phone itself only monitors the bottom row of pins. If the user has inserted the cable right-side-up, the phone needs to use the pin, which is fifth from the left, to communicate with the BQ2025. That’s where the black signal is. Furthermore, if the user has inserted the cable upside-down (or is it right-side-up?), the phone needs to use the left-most pin. The BQ2025’s one data pin is connected to two Lightning cable pins. Why two? Recall that the Lightning cable is designed to work no matter which way it is inserted into the phone (USB anyone?). Some may call it lazy to not have to think when plugging something in, but we feel that it is a subtle improvement in usability that shows attention to detail.