What is MFi------- Apple Inc.'s MFi Program ("Made for iPhone/iPod/iPad") is a licensing program for developers of hardware and software peripherals that work with Apple's iPod, iPad and iPhone, the so-called iDevices. The name is a shortened version of the original long-form Made For iPod. The program covers various iDevice connectors including the headphone jack, original dock connector and the newer Lightning connector, as well as AirPlay support. Companies joining the MFi program and passing certification tests are able to display certain MFi-related logos on their product packaging, like the "Made for iPod" badge. The original Made for iPod was launched at the Macworld Expo on 11 January 2005, although some products released just before the announcement carried a "Ready for iPod" label instead.[1] It was reported at that time that Apple would be charging a 10% cut for all products with the logo, and the press described this as a "tax".iPods use an extended headphone jack that allows additional control inputs like mute and volume adjustments, and licenses were available for products plugging into the jack or the dock connector. When using the dock connector, devices are able to control the iPod using a simple serial protocol known as the Apple Accessory Protocol (AAP). This uses a (normally) 19,200 bit/s 8N1 communications signal to send short packets containing commands like "take voice note" or "volume up". With the introduction of the 3rd generation iPods, AAP was available to the headphone connection as well. These signals are used by many Made for iPod devices to allow remote control, including car integration systems.
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