JAJSMF1G April 2006 – July 2021 TLV320AIC3106
PRODUCTION DATA
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The DAC channel consists of optional filters for de-emphasis and bass, treble, midrange level adjustment, speaker equalization, and 3-D effects processing. The de-emphasis function is implemented by a programmable digital filter block with fully programmable coefficients (see Page-1/Reg-21-26 for left channel, Page-1/Reg-47-52 for right channel). If de-emphasis is not required in a particular application, this programmable filter block can be used for some other purpose. The de-emphasis filter transfer function is given by:
where the N0, N1, and D1 coefficients are fully programmable individually for each channel. The coefficients that should be loaded to implement standard de-emphasis filters are given in Table 10-3.
SAMPLING FREQUENCY | N0 | N1 | D1 |
---|---|---|---|
32-kHz | 16950 | –1220 | 17037 |
44.1-kHz | 15091 | –2877 | 20555 |
48-kHz(1) | 14677 | –3283 | 21374 |
In addition to the de-emphasis filter block, the DAC digital effects processing includes a fourth order digital IIR filter with programmable coefficients (one set per channel). This filter is implemented as