TDA9875 Philips Semiconductors, TDA9875 Datasheet - Page 45

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

Philips Semiconductors
10.3.14 NICAM
10.3.14.1 Description
When the auto-mute function is enabled (bit AMUTE in the NICAM configuration register) and the NICAM bit error count
is higher than the value contained in this register, the signal of the first sound carrier (i.e. FM mono or AM sound) is
selected for reproduction.
The difference between upper and lower error limit constitutes a hysteresis to avoid frequent switching between NICAM
and the program on the first sound carrier.
10.3.14.2 Definition
Table 35 Subaddress 17 (notes 1 and 2)
Notes
1. The default setting at power-up is 01010000.
2. The lower bit error rate limit
10.3.15 A
10.3.15.1 Description
When any of these bits are set HIGH, the corresponding pair of output channels will be muted. A LOW bit allows normal
signal output.
There is a soft-mute facility for the Main and Auxiliary output channels to provide click-free muting independent of the
volume control. This is switched on/off by bits MUTMAIN and MUTAUX.
10.3.15.2 Definition
Table 36 Subaddress 18 (note 1)
Note
1. The default setting at power-up is 11111111.
1998 Feb 13
Digital TV Sound Processor (DTVSP)
MSB
B7
7 (MSB)
0 (LSB)
BIT
6
5
4
3
2
1
UDIO MUTE CONTROL REGISTER
UPPER ERROR LIMIT REGISTER
B6
MUTMAIN
MUTLINE
MUTDAC
MUTAUX
MUTI
MUTI
MUTSC2
MUTSC1
NAME
subaddress 16
2
2
S2
S1
B5
B4
1.74
45
10
5
.
B3
mute SCART 2 outputs
mute SCART 1 outputs
mute Auxiliary outputs
mute Main channels
mute internal DAC
mute I
mute I
mute line outputs
DESCRIPTION
2
2
S2 outputs
S1 outputs
B2
Preliminary specification
B1
TDA9875
LSB
B0