tda9874h NXP Semiconductors, tda9874h Datasheet - Page 32

• Manufacturer Part Number: tda9874h
• Description: Digital Tv Sound Demodulator/decoder
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7.3.19
This register is used to define both the signal source to be output at the I
for signal selection.
The two combinations of FM and NICAM shown in Table 52 apply to the (rare) condition that three different languages
are being broadcast in an FM + NICAM system. They allow for a two-out-of-three selection for special applications. Note
that the controlling microprocessor has to assure that the FM dematrix is set to the mono position.
The default setting at power-up is 0000 0000.
Table 49 I
Table 50 Description of the I
Table 51 Mode of the digital matrix for signal selection
Table 52 Signal source left and right
2000 Jun 26
Digital TV sound demodulator/decoder
ICSM2
ISS1
BIT
7
7
6
5
4
3
2
1
0
0
0
0
0
1
0
0
1
1
I
2
S-
2
S-bus output select register (subaddress 22)
BUS OUTPUT SELECT REGISTER
SYMBOL
ICSM2
ICSM2
ICSM1
ICSM0
ICSM1
ISS1
ISS0
ISS0
6
0
0
1
1
0
0
1
0
1
2
S-bus output select register bits
this bit is not used and should be set to logic 0
Output channel selection mode: these 3 bits select the output channel selection mode
(see Table 51).
these bits are not used and should be set to logic 0
Signal source: these bits select the signal source (see Table 52).
ICSM1
ICSM0
5
0
1
0
1
0
NICAM left
FM mono
FM mono
ICSM0
FM left
LEFT
4
L OUTPUT
32
R input
R input
L input
L input
L
------------- -
+
2
R
SIGNAL SOURCE
3
DESCRIPTION
2
S-bus port and the mode of the digital matrix
2
NICAM right
NICAM M1
NICAM M2
FM right
RIGHT
ISS1
R OUTPUT
1
R input
R input
L input
L input
L
------------- -
Product specification
+
2
TDA9874H
R
ISS0
0