TLV320AIC3105 Datasheet, PDF (41/103 Pages) Burr-Brown (TI) – LOW-POWER STEREO AUDIO CODEC FOR PORTABLE AUDIO/TELEPHONY

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Device Functional Modes (continued)
MIC2L/LINE2L
LINE2L
MIC1L/LINE1L
LINE1L
TLV320AIC3105
SLAS513C – FEBRUARY 2007 – REVISED DECEMBER 2014
LINE2L ^SW-L2
LINE1L ^SW-L1
SW-L0
LEFT_LOP
LEFT_LOM
MIC1R/LINE1R
LINE1R
MIC2R/LINE2R
LINE2R
LINE2R ^SW-R2
LINE1R ^SW-R1
SW-R0
RIGHT_LOP
RIGHT_LOM
Figure 28. Passive Analog Bypass Mode Configuration
B0174-02
10.4.2 Digital Audio Processing for Record Path
In applications where record only is selected, and DAC is powered down, the playback path signal processing
blocks can be used in the ADC record path. These filtering blocks can support high-pass, low-pass, band-pass or
notch filtering. In this mode, the record only path has switches SW-D1 through SW-D4 closed, and reroutes the
ADC output data through the digital signal processing blocks. Because the DAC digital signal processing blocks
are being re-used, naturally the addresses of these digital filter coefficients are the same as for the DAC digital
processing and are located on page 1, registers 1–52. This record only mode is enabled by powering down both
DACs by writing to page 0, register 37, bits D7–D6 (D7 = D6 = 0). Next, enable the digital filter pathway for the
ADC by writing a 1 to page 0, register 107, bit D3. (Note, this pathway is only enabled if both DACs are powered
down.) This record only path can be seen in Figure 29.
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