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WM9711 Datasheet(PDF) 30 Page - Wolfson Microelectronics plc |
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WM9711 Datasheet(HTML) 30 Page - Wolfson Microelectronics plc |
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30 / 66 page  WM9711L Production Data w PD Rev 4.1 April 2004 30 LOUDSPEAKER OUTPUTS – LOUT2 AND ROUT2 The LOUT2 and ROUT2 outputs are designed to differentially drive an 8 Ω mono speaker. They can also be used as a stereo line-out or headphone output. For speaker drive, the LOUT2 signal must be inverted (INV = 1), so that the left and right channel are added up in the speaker [R–(-L) = R+L]. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 15 MUTE 1 Mute LOUT2 and ROUT2 1: Mute (OFF) 0: No Mute (ON) 13:8 LOUT2VOL 00000 (0dB) LOUT2 Volume 000000: 0dB (maximum) 000001: -1.5dB … (1.5dB steps) 011111: -46.5dB 1xxxxx: -46.5dB 7 ZC 0 Zero Cross Enable 0: Change gain immediately 1: Change gain only on zero crossings, or after time-out 6 INV 0 LOUT2 Invert 0 = No Inversion (0 ° phase shift) 1 = Signal inverted (180 ° phase shift) 02h LOUT2/ROUT2 Volume 5:0 ROUT2VOL 00000 (0dB) ROUT2 Volume Similar to LOUT2VOL 16h 8 SRC 0 Source of LOUT2/ROUT2 signals 0: speaker mixer (for BTL speaker) 1: headphone mixer (for stereo output) Table 17 LOUT2 / ROUT2 Control Note: 1. For BTL speaker drive, it is recommended that LOUT2VOL = ROUT2VOL. |
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