Datasheet
LM49370
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SNAS356D –FEBRUARY 2007–REVISED MARCH 2012
AUX_LEFT CONFIGURATION REGISTER
This register is used to control the left aux analog input.
Table 22. AUX_LEFT (0x0Fh)
Bits Field Description
4:0 AUX_ This programs the gain/attenuation applied to the AUX LEFT analog input to the mixer.
(1)
LEFT_
AUX_LEFT_LEVEL Level (With Boost) Level (Without Boost)
LEVEL
00000
2
−34.5 dB −46.5 dB
00001
2
−33 dB −45 dB
00010
2
−31.5 dB −43.5 dB
00011
2
−30 dB −42 dB
00100 to 11100
2
−28.5 dB to +7.5 dB −40.5 dB to −4.5 dB
11101
2
+9 dB −3 dB
11110
2
+10.5 dB −1.5 dB
11111
2
+12 dB 0 dB
5 AUX_ If set, the gain of the AUX_LEFT input to the mixer is increased by 12 dB (see above).
LEFT_
BOOST
6 AUX_L_MUTE If set, the AUX LEFT input is muted.
7 AUX_OR_DAC_L If set, the AUX LEFT input is passed to the mixer, the default is for the DAC LEFT output to be passed to the
mixer.
(1) The recommended mixer level is 1V RMS. The auxiliary analog inputs can be boosted by 12 dB if enough headroom is available.
Clipping may occur if the analog power supply is insufficient to cater for the required gain.
AUX_RIGHT CONFIGURATION REGISTER
This register is used to control the right aux analog input.
Table 23. AUX_RIGHT (0x10h)
Bits Field Description
4:0 AUX_ This programs the gain/attenuation applied to the AUX RIGHT analog input to the mixer.
(1)
RIGHT_
AUX_RIGHT_LEVEL Level (With Boost) Level (Without Boost)
LEVEL
00000
2
−34.5 dB −46.5 dB
00001
2
−33 dB −45 dB
00010
2
−31.5 dB −43.5 dB
00011
2
−30 dB −42 dB
00100 to 11100
2
−28.5 dB to +7.5 dB −40.5 dB to −4.5 dB
11101
2
+9 dB −3 dB
11110
2
+10.5 dB −1.5 dB
11111
2
+12 dB 0 dB
5 AUX_ If set, the gain of the AUX_RIGHT input to the mixer is increased by 12 dB (see above).
RIGHT_BOOST
6 AUX_R_MUTE If set, the AUX RIGHT input is muted.
7 AUX_OR_DAC_R If set, the AUX RIGHT input is passed to the mixer, the default is for the DAC RIGHT output to be passed to
the mixer.
(1) The recommended mixer level is 1V RMS. The auxiliary analog inputs can be boosted by 12 dB if enough headroom is available.
Clipping may occur if the analog power supply is insufficient to cater for the required gain.
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