SGTL5000XNAA3 Datasheet, PDF (38/84 Pages) Freescale Semiconductor, Inc – Low Power Stereo Codec with Headphone Amp

SGTL5000
DATASHEET
Please refer to section 6.2.4.2 and section 6.3.5 for a programming example on how
to configure Surround width and how to enable/disable Surround.
5.9.3.
SigmaTel Bass Enhance
SigmaTel Bass Enhance is a royalty-free algorithm that enhances natural bass
response of the audio. Bass Enhance extracts bass content from right and left
channels, adds bass and mixes this back up with the original signal. An optional
complementary high pass filter is provided after the mixer.
Input
(From SGTL Surround)
DAP_BASS_ENHANCE_CTRL
->LR_LEVEL
DAP_BASS _ENHANCE_CTRL
->CUTOFF_HPF
->BYPASS _HPF
High Pass
Filter
Output
(To PEQ/GEQ/TC)
Low Pass
Filter
DAP_BASS_ENHANCE
->CUT_OFF
Bass
Enhance
DAP_BASS_ENHANCE_CTRL
->BASS _LEVEL
Figure 16. DAP- SigmaTel Bass Enhance
The SGTL Bass Enhance can be enabled or configured in pass-through mode (
input will be passed through without any processing).
The cut-off frequency of the low-pass filter (LPF) can be selected based on the
speakers freqeuncy response. The cut-off frequency of the low-pass and high-pass
filters are selectable between 80Hz to 225Hz. Also, the input signal and bass
enhanced signal can be individually adjusted for level before the two signals are
mixed.
Please refer to section 6.2.4.3 and section 6.3.6 for a programming example on how
to configure Bass Enhance and how to enable/disable this feature.
5.9.4.
7-Band Parametric EQ / 5-Band Graphic EQ / Tone Control
One 7-band parametric equalizer (PEQ) and one 5-band graphic equalizer (GEQ)
and a Tone Control (Bass and Treble control) blocks are implemented as mutually
exclusive blocks. Only one block can be used at a given time.
Please refer to section 6.2.4.4 for a programming example that shows how to select
the desired EQ mode.
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SGTL5000 EA2 DS-0-3