tda9874aps NXP Semiconductors, tda9874aps Datasheet - Page 37

• Manufacturer Part Number: tda9874aps
• Description: Digital Tv Sound Demodulator/decoder
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 54 Auto-select function (bit TVSM = 1 and bit IDSWFM = 1): FM mode/NICAM mode for stereo DAC
Note
1. X = don’t care.
Signal source selection bits SDOS1 and SDOS0 must be set to logic 0X for FM mode (including FM mode by switching
if auto-mute select is set to logic 0) or to logic 01 for NICAM mode, when using the auto-select function.
7.3.19
The default setting after Power-on reset is 0000 0000.
Table 55 Digital audio interface configuration register (subaddress 21)
Table 56 Description of the digital audio interface configuration register bits
2000 Aug 04
Digital TV sound demodulator/decoder
OUTPUT CHANNEL SELECTION
CSM2
BIT
0
0
7
0
7
6
5
4
3
2
1
0
D
IGITAL
A
I2SFORM
SYMBOL
SYSOUT
MODE
CSM1
SYSCL1
SYSCL0
I2SOUT
UDIO
0
1
6
0
I
NTERFACE
these bits are not used and should be set to logic 0
System clock frequency select: these bits select the frequency of the system clock;
see Table 57.
System clock output on/off: if bit SYSOUT = 1 it enables the output of a system (or
master) clock signal at pin SYSCLK. If bit SYSOUT = 0 the output will be off, thereby
improving EMC performance.
Serial output format: if bit I2SFORM = 1 it selects an MSB-aligned, MSB-first output
format, i.e. a level change at the word select pin indicates the beginning of a new audio
sample. If bit I2SFORM = 0 it selects the standard I
I
plus serial bit clock and word select in a format determined by the bit I2SFORM.
The TDA9874A then is an I
be 3-stated, thereby improving EMC performance.
2
CSM0
S-bus output on/off: if bit I2SOUT = 1 it enables the output of serial audio data (2 pins)
X
C
0
(1)
ONFIGURATION
5
0
MONO
FM IDENT/NICAM SOUND MODE
M/M
M/M
SYSCL1
R
4
EGISTER
2
37
STEREO
S-bus master. If bit I2SOUT = 0 the outputs mentioned will
(DAICONR)
L/R
L/R
SYSCL0
3
DESCRIPTION
DUAL
A/A
B/B
SYSOUT
2
2
S-bus output format.
AUTO-MUTE = HIGH;
I2SFORM
CH2MOD = 10
FM/AM: M/M
FM/AM: M/M
1
Product specification
TDA9874A
I2SOUT
0