TFA9812HN PHILIPS [NXP Semiconductors], TFA9812HN Datasheet - Page 16

• Manufacturer Part Number: TFA9812HN
• Description: BTL stereo Class-D audio amplifier with I2S input
• Manufacturer: PHILIPS [NXP Semiconductors]

NXP Semiconductors
TFA9812_2
Preliminary data sheet
8.5.1.1 Equalizer options
8.5.1.2 Equalizer band function
8.4.2 Digital audio data format control
8.5.1 Equalizer
8.5 Digital signal-processing features
In I
12 kHz, 16 kHz, 22.05 kHz, 24 kHz, 32 kHz, 44.1 kHz, 48 kHz, 64 kHz, 88.2 kHz, 96 kHz,
128 kHz, 176.4 kHz or 192 kHz. The I
Section
In Legacy control mode the following sample frequencies (f
44.1 kHz or 48 kHz.
The BCK-to-WS and MCLK-to-WS frequency ratios are automatically detected, so no
control settings need to be configured for these.
In I
controls for selecting the supported formats can be found in
control mode only a subset of the supported formats can be used. These are shown in
Table 12
See
Table 13.
The equalizer function can be bypassed and the equalizer can be configured to either a
5-band or 10-band function. These settings are for both audio channels simultaneously.
There are 20 bands in the equalizer. These are distributed as follows:
In I
In Legacy control mode the equalizer is bypassed.
The shape of each parametric equalizer band is determined by the three filter parameters:
SCL/SFOR pin value
0
1
•
•
•
•
•
•
•
2
2
2
C control mode the following sample frequency f
C control mode all the formats listed in
Bands A1 to A5 are bands 1 to 5 of output 1 (used in 5-band and 10-band
configuration).
Bands B1 to B5 are bands 1 to 5 of output 2 (used in 5-band and 10-band
configuration).
Bands C1 to C5 are bands 6 to 10 of output 1 (used in 10-band configuration only).
Bands D1 to D5 are bands 6 to 10 of output 2 (used in 10-band configuration only).
C control mode each band can be configured separately using I
(Relative) center frequency
Quality factor Q.
Gain factor G.
Section 8.2.1
9.5.7.
and the required pin control is given in
Digital audio data format selection in Legacy control mode
for details of how to enable Legacy control mode.
Rev. 02 — 22 January 2009
Interface formats (MSB-first)
I
MSB-justified
2
S
=
BTL stereo Class-D audio amplifier with I
2
2
C control for f
f
c
Table 12
f
s
.
Table
s
s
are supported. The appropriate I
can be used: 8 kHz, 11.025 kHz,
selection can be found in
13.
s
) can be used: 32 kHz,
Section
2
9. In the Legacy
C register settings.
© NXP B.V. 2009. All rights reserved.
TFA9812
2
S input
16 of 66
2
C