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ADAU1761BCPZ-R7 数据表(PDF) 73 Page - Analog Devices |
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ADAU1761BCPZ-R7 数据表(HTML) 73 Page - Analog Devices |
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73 / 93 page ![]() ADAU1761 Rev. C | Page 72 of 92 R28: Playback L/R Mixer Mono Output (Mixer 7) Control, 16,418 (0x4022) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Reserved MX7[1:0] MX7EN Table 62. Playback L/R Mixer Mono Output (Mixer 7) Control Register Bits Bit Name Description [2:1] MX7[1:0] L/R mono playback mixer (Mixer 7). Mixes the left and right playback mixers (Mixer 3 and Mixer 4) with either a 0 dB or 6 dB gain boost. Additionally, this mixer can operate as a common-mode output, which is used as the virtual ground in a capless headphone configuration. Setting Gain Boost 00 Common-mode output (default) R29: Playback Headphone Left Volume Control, 16,419 (0x4023) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 LHPVOL[5:0] LHPM HPEN Table 63. Playback Headphone Left Volume Control Register 01 0 dB output (−6 dB gain on each of the two inputs) 10 6 dB output (0 dB gain on each of the two inputs) 11 Reserved 0 MX7EN Mixer 7 enable. 0 = disabled (default). 1 = enabled. Bits Bit Name Description [7:2] LHPVOL[5:0] Headphone volume control for left channel, LHP output. Each 1-bit step corresponds to a 1 dB increase in volume. See Table 95 for a complete list of the volume settings. Setting Volume 000000 −57 dB (default) … … 111001 0 dB … … 111111 6 dB 1 LHPM Headphone mute for left channel, LHP output (active low). 0 = mute. 1 = unmute (default). 0 HPEN Headphone volume control enable. Logical OR with the HPMODE bit in Register R30. If either the HPEN bit or the HPMODE bit is set to 1, the headphone output is enabled. 0 = disabled (default). 1 = enabled. |
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