External Audio

NHL-4 is designed to support fully differential external audio accessory connection by using Pop-Port [TM] system connector. Pop-Port [TM] connector has serial data bus called ACI (Accessory Control Interface) for accessory insertion and removal detection and identification and authentication. ACI line is also used for accessory control purposes. See section ACI, Accessory Control Interface. Audio support from Pop-Port [TM] system connector:

4-wire fully differential stereo audio (used also FM-radio antenna connection) 2-wire differential mic input

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