Datenblatt-Suchmaschine für elektronische Bauteile |
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AD1981A Datenblatt(PDF) 11 Page - Analog Devices |
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AD1981A Datenblatt(HTML) 11 Page - Analog Devices |
11 / 24 page REV. 0 AD1981A –11– PHV[4:0] Phone Volume: Allows setting the phone volume attenuator in 32 volume levels. The LSB represents 1.5 dB, and the range is +12 dB to –34.5 dB. The default value is 0 dB with mute bit enabled. PHM Phone Mute: When this bit is set to “1,” the phone channel is muted. Mic Volume (Index 0Eh) MCV[4:0] MIC Volume Gain: Allows setting the mic volume attenuator in 32 volume levels. The LSB represents 1.5 dB, and the range is +12 dB to –34.5 dB. The default value is 0 dB with mute enabled. M20 MIC Gain Boost: This bit allows setting additional MIC gain to increase the microphone sensitivity. The nominal gain boost by default is 20 dB; however, bits D0 and D1 (MBG[1:0]) on the miscellaneous control bits register (76h) allow changing the gain boost to 10 dB or 30 dB if necessary. 0 = Disabled; Gain = 0 dB 1 = Enabled; Default Gain = 20 dB (see Register 76h, bits D0, D1) MCM MIC Mute: When this bit is set to “1,” the MIC channel is muted. Line In Volume (Index 10h) Reg Num Name D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default 10h Line In Volume LM X X LLV4 LLV3 LLV2 LLV1 LLV0 RM * X X RLV4 RLV3 RLV2 RLV1 RLV0 8808h *For AC ‘97 compatibility, Bit D7 (RM) is only available by setting the MSPLT bit Register 76h. The MSPLT bit enables separate mute bits for the left and right channels. If MSPLT is not set, RM bit has no effect. RLV[4:0] Line In Volume Right: Allows setting the line in right channel attenuator in 32 volume levels. The LSB represents 1.5 dB, and the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled. RM Right Channel Mute: Once enabled by the MSPLT Bit in Register 76h, this bit mutes the right channel separately from the LM bit. Otherwise, this bit will always read “0” and will have no effect when set to “1.” LLV[4:0] Line In Volume Left: Allows setting the line in left channel attenuator in 32 volume levels. The LSB represents 1.5 dB, and the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled. LM Line In Mute: When this bit is set to “1,” both L/R channels are muted unless the MSPLT Bit in Register 76h is set to “1,” in which case this mute bit will only affect the left channel. CD Volume (Index 12h) *For AC ‘97 compatibility, Bit D7 (RM) is only available by setting the MSPLT bit Register 76h. The MSPLT bit enables separate mute bits for the left and right channels. If MSPLT is not set, RM bit has no effect. RCV[4:0] Right CD Volume: Allows setting the CD right channel attenuator in 32 volume levels. The LSB represents 1.5 dB, and the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled. RM Right Channel Mute: Once enabled by the MSPLT Bit in Register 76h, this bit mutes the right channel separately from the CM bit. Otherwise, this bit will always read “0” and will have no effect when set to “1.” LCV[4:0] Left CD Volume: Allows setting the CD left channel attenuator in 32 volume levels. The LSB represents 1.5 dB, and the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled. CM CD Volume Mute: When this bit is set to “1,” both L/R channels are muted, unless the MSPLT Bit in Register 76h is set to “1,” in which case, this mute bit will only affect the left channel. Reg Num Name D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default 0Eh Mic Volume MCM XXXXX X X X M20 X MCV4 MCV3 MCV2 MCV1 MCV0 8008h Reg Num Name D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default 12h CD Volume CM X X LCV4 LCV3 LCV2 LCV1 LCV0 RM * X X RCV4 RCV3 RCV2 RCV1 RCV0 8808h |
Ähnliche Teilenummer - AD1981A_15 |
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Ähnliche Beschreibung - AD1981A_15 |
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