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WM8993 bảng dữ liệu(PDF) 97 Page - Wolfson Microelectronics plc |
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WM8993 bảng dữ liệu(HTML) 97 Page - Wolfson Microelectronics plc |
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97 / 229 page  Production Data WM8993 w PD, November 2010, Rev 4.0 97 LINEOUT1N LINEOUT1P + LINEOUT1NMIX LINEOUT1PMIX MIXOUTLVOL MIXOUTRVOL Min = -57dB Max = +6dB Step = 1dB Min = -57dB Max = +6dB Step = 1dB 0dB or -6dB 0dB or -6dB LINEOUT2N LINEOUT2P + LINEOUT2NMIX LINEOUT2PMIX 0dB or -6dB 0dB or -6dB + + MIXOUTLVOL IN1L IN1R MIXOUTRVOL IN1R IN1L MIXOUTLVOL MIXOUTLVOL IN1L IN1R MIXOUTRVOL IN1R IN1L MIXOUTRVOL IN1L IN1R IN1L IN1R Ground Loop Noise Rejection Ground Loop Noise Rejection Ground Loop Noise Rejection Ground Loop Noise Rejection LINEOUT1N_MUTE=0, LINEOUT1P_MUTE=0 LINEOUT2N_MUTE=0, LINEOUT2P_MUTE=0 LINEOUT1_MODE=1 MIXOUTL_TO_LINEOUT2N=1 MIXOUTR_TO_LINEOUT2P=1 LINEOUT_VMID_BUF_ENA=1 LINEOUT1N LINEOUT1P + LINEOUT1NMIX LINEOUT1PMIX MIXOUTLVOL MIXOUTRVOL Min = -57dB Max = +6dB Step = 1dB Min = -57dB Max = +6dB Step = 1dB 0dB or -6dB 0dB or -6dB LINEOUT2N LINEOUT2P + LINEOUT2NMIX LINEOUT2PMIX 0dB or -6dB 0dB or -6dB + + MIXOUTLVOL IN1L IN1R MIXOUTRVOL IN1R IN1L MIXOUTLVOL MIXOUTLVOL IN1L IN1R MIXOUTRVOL IN1R IN1L MIXOUTRVOL IN1L IN1R IN1L IN1R Ground Loop Noise Rejection Ground Loop Noise Rejection Ground Loop Noise Rejection Ground Loop Noise Rejection LINEOUT1N_MUTE=0, LINEOUT1P_MUTE=0 LINEOUT2N_MUTE=0, LINEOUT2P_MUTE=0 LINEOUT1_MODE=1 LINEOUT2_MODE=1 MIXOUTL_TO_LINEOUT1N=1 and/or MIXOUTL_TO_LINEOUT1P=1 MIXOUTR_TO_LINEOUT2N=1 and/or MIXOUTR_TO_LINEOUT2P=1 LINEOUT_VMID_BUF_ENA=1 Figure 32 Stereo Single-Ended Line Out from MIXOUTL and MIXOUTR to LINEOUT2 Figure 33 Mono Line Out to LINEOUT1N, LINEOUT1P, LINEOUT2N, LINEOUT2P The line outputs incorporate a common mode, or ground loop, feedback path which provides rejection of system-related ground noise. The return path, via LINEOUTFB, is enabled separately for LINEOUT1 and LINEOUT2 using the LINEOUT1_FB and LINEOUT2_FB bits as defined in Table 63. Ground loop feedback is a benefit to single-ended line outputs only; it is not applicable to differential outputs, which already inherently offer common mode noise rejection. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R55 (37h) Additional Control 7 LINEOUT1_FB 0b Enable ground loop noise feedback on LINEOUT1 0 = Disabled 1 = Enabled 6 LINEOUT2_FB 0b Enable ground loop noise feedback on LINEOUT2 0 = Disabled 1 = Enabled Table 63 Line Output Ground Loop Feedback Enable |
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