TDA9875 Philips Semiconductors, TDA9875 Datasheet - Page 75

• Manufacturer Part Number: TDA9875
• Description: Digital TV Sound Processor DTVSP
• Manufacturer: Philips Semiconductors

Philips Semiconductors
10.3.40 B
10.3.40.1 Description
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 2nd-order filter and can, within limits, realize bass equalizers with arbitrary centre frequencies,
Q factors and boost/cut settings.
10.3.40.2 Definition
Table 88 Subaddress 45 (note 1; see Table 89)
Note
1. The default setting at power-up is 00000000.
Table 89 Gain setting
1998 Feb 13
Digital TV Sound Processor (DTVSP)
B7, B3
MSB
B7
1
1
1
0
0
0
0
0
0
0
0
ASS BOOST CONTROL REGISTER
B6, B2
B6
0
0
0
1
1
1
1
0
0
0
0
B5, B1
B5
1
0
0
1
1
0
0
1
1
0
0
B4, B0
B4
0
1
0
1
0
1
0
1
0
1
0
75
B3
GAIN SETTING
(dB)
20
18
16
14
12
10
8
6
4
2
0
B2
CORNER FREQUENCY
Preliminary specification
B1
TDA9875
(Hz)
350
350
350
350
350
350
350
350
350
350
350
LSB
B0