Datasheet

LM49350, LM49350RLEVAL
www.ti.com SNAS359D –SEPTEMBER 2008–REVISED JUNE 2012
Table 34. Input Levels 2 (0x41h)
Bits Field Description
1:0 ADC_L_LVL This programs the input level of the data arriving from the left ADC channel.
ADC_L_LVL Level
00 0dB
01 –6dB
10 –12dB
11 –18dB
3:2 ADC_R_LVL This programs the input level of the data arriving from the right ADC channel.
ADC_R_LVL Level
00 0dB
01 –6dB
10 –12dB
11 –18dB
5:4 INTERP_L_LVL This programs the input level of the data arriving from the left DAC's interpolator output.
INTERP_L_LVL Level
00 0dB
01 –6dB
10 –12dB
11 –18dB
7:6 INTERP_R_LVL This programs the input level of the data arriving from the right DAC's interpolator output.
INTERP_R_LVL Level
00 0dB
01 –6dB
10 –12dB
11 –18dB
Table 35. Audio Port 1 Input (0x42h)
Bits Field Description
1:0 L_SEL This selects which input is fed to the Left TX Channel of Audio Port 1.
L_SEL Selected Input
00 None
01 ADC_L
10 PORT2_RX_L
11 DAC_INTERP_L
3:2 R_SEL This selects which input is fed to the Right TX Channel of Audio Port 1.
R_SEL Selected Input
00 None
01 ADC_R
10 PORT2_RX_R
11 DAC_INTERP_R
4 SWAP If set, this swaps the Left and Right outputs to Audio Port 1. The swap bit can be used to control which
microphone is being used for audio port transmit. For example, if LEFT_MIC is used as a primary handset
microphone and RIGHT_MIC is used a headset microphone, the SWAP bit allows the audio port to select
one of the microphones at a time for audio port transmit via the ADC.
5 MONO If set, the right channel is ignored and the left channel becomes (left+right)/2.
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