lm49350rl National Semiconductor Corporation, lm49350rl Datasheet - Page 43

• Manufacturer Part Number: lm49350rl
• Description: High Performance Audio Codec Sub-system With A Ground-referenced Stereo Headphone Amplifier & An Ultra Low Emi Class D Loudspeaker Amplifier With Dual I2s/pcm Digital Audio Interfaces
• Manufacturer: National Semiconductor Corporation

Bits
Bits
Bits
3:0
4
5
0
1
2
3
4
0
1
2
3
4
5
MIC_L_LEVEL
AUX_NEG_6dB
SE_DIFF
HP_NEG_6dB
LS_NEG_6dB
DACR_ADCR
AUXR_ADCR
DACL_ADCL
MICR_ADCR
AUXL_ADCL
MICL_ADCL
CP_FORCE
MUTE
Field
EPMODE
Field
Field
This sets the gain of the left microphone preamp.
If set, the MIC_L negative input is ignored.
If set, the left microphone preamp is muted.
If set the HPR output is driven with the negative input of the HPL output stage.
If set, both HPL and HPR are attenuated by 6dB. This is useful when adding stereo signals
that need more headroom due to being highly correlated.
If set the class D output is attenuated by 6dB. This is useful when adding stereo signals that
need more headroom due to being highly correlated.
If set the AUX output is attenuated by 6dB. This is useful when adding stereo signals that
need more headroom due to being highly correlated.
If set, a -LS_VDD rail will be created on HP_VSS, even if the HP output stage is not required.
The right DAC output is added to the ADC right input.
The left DAC output is added to the ADC left input.
The right MIC input is added to the ADC right input. Setting this bit enables MIC BIAS.
The left MIC input is added to the ADC left input. Setting this bit enables MIC BIAS.
The right AUX input is added to the ADC right input.
The left AUX input is added to the ADC left input.
TABLE 21. OUTPUT_OPTIONS (0x14h)
TABLE 23. MIC_L_INPUT (0x16h)
TABLE 22. ADC_INPUT (0x15h)
MIC_L_LEVEL
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
43
Description
Description
Description
10dB
12dB
14dB
16dB
18dB
20dB
22dB
24dB
26dB
28dB
30dB
32dB
34dB
36dB
Gain
6dB
8dB
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