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AD1986AJCP Fiches technique(PDF) 46 Page - Analog Devices |
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AD1986AJCP Fiches technique(HTML) 46 Page - Analog Devices |
46 / 56 page AD1986A Rev. 0 | Page 46 of 56 Register Function LOHPEN Enables the headphone drive on the LINE_OUT pins. Disabling the headphone drive is the same as powering it down (see the PR6 bit (0x26 D14)). LOHPEN Function 0 LINE_OUT headphone drive is disabled Default 1 LINE_OUT headphone drive is enabled LVREF [2:0] (Line In VREF_OUT) Sets the voltage/state of the LINE_IN VREF_OUT signal. VREF_OUT is used to power microphone style devices plugged into the connected jack circuitry. The VREF_OUT pin must be connected to both the left and right channels through external resistors to function properly. Selections other than those defined are invalid and should not be programmed. LINE_IN VREF_OUT Setting LVREF [2:0] 5.0 AVDD 000 Hi-Z Default 001 2.25 V 010 0V 100 3.70 V This bit allows the LINE_OUT output amplifiers to be driven by the mixer or the surround DACs. The main purpose for this is to allow swapping of the front and surround channels to make better use of the SURR/HP_OUT output amplifiers. This bit should normally be used in tandem with the HPSEL bit (following in table). LOSEL (LINE_OUT Amplifiers Input Select) LOSEL LINE_OUT Select 0 LINE_OUT amplifiers are driven by the analog mixer outputs Default 1 LINE_OUT amplifiers are driven by the surround DAC SENSE_A: Select the style of switch used on the audio jacks connected to Sense A. JSINVA Jack Sense Invert JSINVA Jack Sense Invert—SENSE_A 0 SENSE_A configured for normally-open (NO) switches Default 1 SENSE_A configured for normally-closed (NC) switches This bit allows the headphone power amps to be driven from the surround DACs, C/LFE DACs, or from the mixer outputs. HPSEL [1:0] HP_OUT Selection 00 Outputs are driven by the mixer outputs Default 01 Outputs are driven by the surround DACs HPSEL [1:0] (Headphone Amplifier Input Select) 1x Outputs are driven by the C/LFE DACs |
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Description similaire - AD1986AJCP |
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