tda9870ah NXP Semiconductors, tda9870ah Datasheet - Page 74
tda9870ah
Manufacturer Part Number
tda9870ah
Description
Digital Tv Sound Processor Dtvsp
Manufacturer
NXP Semiconductors
Datasheet
1.TDA9870AH.pdf
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Philips Semiconductors
10.3.40 B
This register is used to select from a few sample bass boost settings to modify the frequency characteristics of the Main
channel (shelving filter). Bits B3 to B0 apply to the left channel, bits B7 to B4 apply to the right channel. This function
must be used with care in order to avoid clipping distortion at high volume settings.
More sophisticated control of the bass boost filter can be exercised in the expert mode (see Section 10.5). The user then
has full control over this second-order filter and can, within limits, realize bass equalizers with arbitrary centre
frequencies, Q factors and boost/cut settings.
Table 78 Subaddress 45 (note 1)
Note
1. The default setting at power-up is 00000000.
Table 79 Gain setting of right channel
1999 Dec 20
7 (MSB)
0 (LSB)
Digital TV Sound Processor (DTVSP)
B7
1
1
1
0
0
0
0
0
0
0
0
BIT
6
5
4
3
2
1
ASS BOOST CONTROL REGISTER
B6
0
0
0
1
1
1
1
0
0
0
0
NAME
B7
B6
B5
B4
B3
B2
B1
B0
B5
1
0
0
1
1
0
0
1
1
0
0
VALUE
B4
0
1
0
1
0
1
0
1
0
1
0
gain setting of right channel (see Table 79)
gain setting of left channel (see Table 80)
GAIN SETTING (dB)
20
18
16
14
12
10
8
6
4
2
0
74
DESCRIPTION
CORNER FREQUENCY (Hz)
350
350
350
350
350
350
350
350
350
350
350
Product specification
TDA9870A
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