tda9874aps NXP Semiconductors, tda9874aps Datasheet - Page 46

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

Philips Semiconductors
7.4.2
Table 75 NICAM status register (subaddress 1)
Table 76 Description of the NICAM status register bits; notes 1 and 2
Notes
1. The TDA9874A does not support the extended control modes. Therefore, the program of the first sound carrier
2. When a NICAM transmitter is switched off, the device will lose synchronization. In that case the program of the first
7.4.3
Bits B7 to B0 contain the number of errors occurring in the previous 128 ms period. The register is updated every
128 ms.
Table 77 NICAM error count register (subaddress 2)
2000 Aug 04
Digital TV sound demodulator/decoder
(i.e. FM mono or AM) is selected for reproduction in case bit C3 is set to logic 1, independent of bit AMUTE in the
NICAM configuration register being set or not.
sound carrier is selected for reproduction, independent of bit AMUTE being set or not.
BIT
C4
B7
7
7
6
5
4
3
2
1
0
7
NICAM S
NICAM E
SYMBOL
TATUS
RROR
S/MB
D/SB
OSB
CFC
C3
C4
C3
C2
C1
B6
6
6
C
R
OUNT
EGISTER
NICAM application control bits: these bits correspond to the control bits C1 to C4 in the
NICAM transmission.
Synchronization bit: if bit OSB = 1 it indicates that the device has both frame and C0
(16 frame) synchronization. If bit OSB = 0 it indicates that the audio output from the
NICAM part is digital silence.
Configuration change: if bit CFC = 1 it indicates a configuration change at the 16 frame
(C0) boundary.
Identification of NICAM stereo: if bit S/MB = 1 it indicates stereo mode.
Identification of NICAM dual mono: if bit D/SB = 1 it indicates dual mono mode.
R
EGISTER
(NSR)
C2
B5
5
5
(NECR)
C1
B4
4
4
46
OSB
B3
3
3
DESCRIPTION
CFC
B2
2
2
S/MB
B1
1
1
Product specification
TDA9874A
D/SB
B0
0
0