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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM9712L датащи(PDF) 35 Page - Wolfson Microelectronics plc |
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WM9712L датащи(HTML) 35 Page - Wolfson Microelectronics plc |
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35 / 77 page  Production Data WM9712L w PD Rev 4.5 August 2006 35 AUDIO MIXERS MIXER OVERVIEW The WM9712L has three separate low-power audio mixers to cover all audio functions required by smartphones, PDAs and handheld computers. The diagram below shows the routing of the analogue audio signals into the mixers. The numbers at the mixer inputs refer to the control register bits that control the volume and muting for that particular signal. PHONE_IN PCBEEP LINE_IN Stereo headphone / headset HPOUTL HPOUTR HPVOL (Reg 04h) MONOOUT (PHONE TX) OUT3VOL (Reg 16h) LOUT2 ROUT2 OUT2VOL (Reg 02h) loud speaker OUT3 ear speaker 0Ch [4:0] 10h [12:8,4:0] 18h [12:8,4:0] RECORD SELECT 0Eh [12:8,4:0] MICR MICL DIFF / STEREO/ MONO (Reg 20h) STEREO DAC AUX DAC (12-BIT) 1Ch / ALC 0/20 dB 0Eh [7] M U X MONOOUT VREF 18h [15] 10h [15] 14h [15:12] 14h [11:7] 0Ch [15] 12h [15:12] 18h [13] 10h [13] 0Eh [14,13] 1Ah [13:11] 0Ah [15:12] HEAD PHONE/ EAR SPEAKER MIX PHONE MIX 12h [7:4] 0Ah [7:4] -1 M U X 12h [11:8] 18h [14] 10h [14] 0Ah [11:8] 0Ch [14] BACK SPEAKER MIX SRC (Reg 16h) OUT3SRC (Reg 16h) STEREO ADC M U X PHONE MIX HEADPHONE MIX BACK SPKR MIX INV (Reg 02h) 1Ah [14] 0/20 dB Figure 4 Audio Mixer Overview HEADPHONE MIXER The headphone mixer drives the HPOUTL and HPOUTR outputs. It also drives OUT3, if this pin is connected to an ear speaker (phone receiver). The following signals can be mixed into the headphone path: • PHONE (controlled by register 0Ch, see “Audio Inputs”) • LINE_IN (controlled by register 10h, see “Audio Inputs”) • the output of the Record PGA (see “Audio ADC”, “Record Gain”) • the stereo DAC signal (controlled by register 18h, see “Audio DACs”) • the MIC signal (controlled by register 0Eh, see “Audio Inputs”) • PC_BEEP (controlled by register 0Ah, see “Audio Inputs”) • the AUXDAC signal (controlled by register 12h, see “Auxiliary DAC”) In a typical smartphone application, the headphone signal is a mix of PHONE and sidetone (for phone calls) and the stereo DAC signal (for music playback). |
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