lm4935rlx National Semiconductor Corporation, lm4935rlx Datasheet - Page 43

• Manufacturer Part Number: lm4935rlx
• Description: Audio Sub-system With Dual-mode Stereo Headphone And Mono High Efficiency Loudspeaker Amplifiers And Multi-purpose Adc
• Manufacturer: National Semiconductor Corporation

Bits
12.0 Status & Control Registers
12.21 AUX_RIGHT CONFIGURATION REGISTER
This register is used to control the right aux analog input.
4:0
Note 22: 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.
5
6
7
AUX_OR_DAC_R
RIGHT_BOOST
AUX_R_MUTE
RIGHT_
LEVEL
AUX_
AUX_
Field
Programs the gain/attenuation applied to the AUX RIGHT analog input to the mixer. (Note 22)
If set the gain of the AUX_RIGHT input to the mixer is increased by 12 dB (see above).
If set the AUX RIGHT input is muted.
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.
AUX_RIGHT_LEVEL
00100 to 11100
00000
00001
00010
00011
11101
11110
11111
2
2
2
2
2
2
2
TABLE 22. AUX_RIGHT (0x10h)
2
(Continued)
43
−28.5 dB to +7.5 dB
Level (With Boost)
Description
−34.5 dB
−31.5 dB
+10.5 dB
−33 dB
−30 dB
+12 dB
+9 dB
Level (Without Boost)
−40.5 dB to −4.5 dB
−46.5 dB
−43.5 dB
−1.5 dB
−45 dB
−42 dB
−3 dB
0 dB
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