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ADAU1361BCPZ-R7 Arkusz danych(PDF) 55 Page - Analog Devices |
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ADAU1361BCPZ-R7 Arkusz danych(HTML) 55 Page - Analog Devices |
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55 / 81 page ![]() ADAU1361 Rev. C | Page 54 of 80 R11: ALC Control 0, 16,401 (0x4011) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 PGASLEW[1:0] ALCMAX[2:0] ALCSEL[2:0] Table 38. ALC Control 0 Register Bits Bit Name Description [7:6] PGASLEW[1:0] PGA volume slew time when the ALC is off. The slew time is the period of time that a volume increase or decrease takes to ramp up or ramp down to the target volume set in Register R8 (left differential input volume control) and Register R9 (right differential input volume control). Setting Slew Time 00 24 ms (default) 01 48 ms 10 96 ms 11 Off [5:3] ALCMAX[2:0] The maximum ALC gain sets a limit to the amount of gain that the ALC can provide to the input signal. This protects small signals from excessive amplification. Setting Maximum ALC Gain 000 −12 dB (default) 001 −6 dB 010 0 dB 011 6 dB 100 12 dB 101 18 dB 110 24 dB 111 30 dB [2:0] ALCSEL[2:0] ALC select. These bits set the channels that are controlled by the ALC. When set to right only, the ALC responds only to the right channel input and controls the gain of the right PGA amplifier only. When set to left only, the ALC responds only to the left channel input and controls the gain of the left PGA amplifier only. When set to stereo, the ALC responds to the greater of the left or right channel and controls the gain of both the left and right PGA amplifiers. These bits must be off if manual control of the volume is desired. Setting Channels 000 Off (default) 001 Right only 010 Left only 011 Stereo 100 Reserved 101 Reserved 110 Reserved 111 Reserved |
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