TDA7540B Datasheet, PDF (59/75 Pages) STMicroelectronics – AM/FM Car Radio Tuner IC with Stereo Decoder and Intelligent Selectivity System (ISS)

TDA7540B
Software specification
Table 40. Addr 29 Stereodecoder 6
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0 0 Noise rectifier discharge resistor = infinite
0 1 Noise rectifier discharge resistor =56K
1 0 Noise rectifier discharge resistor =33K
1 1 Noise rectifier discharge resistor =18K
00
Multipath detector band pass gain =6dB
01
Multipath detector band pass gain =12dB
10
Multipath detector band pass gain =9dB
11
0
Multipath detector band pass gain =10,5dB
Multipath detector internal influence ON
1
0
1
Multipath detector internal influence OFF
Multipath detector charge current =0,8µA
Multipath detector charge current =0,4µA
00
01
Multipath detector rectifier gain =7,6dB
Multipath detector rectifier gain =4,6dB
10
Multipath detector rectifier gain =0dB
11
Multipath detector rectifier gain disabled
Table 41. Addr 30 Stereodecoder 7
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0 0 0 0 Roll-Off compensation not allowed
0 0 0 1 Roll-Off compensation 17.1%
0 0 1 0 Roll-Off compensation 15.2%
0 0 1 1 Roll-Off compensation 13.3%
0 1 0 0 Roll-Off compensation 11.4%
0 1 0 1 Roll-Off compensation 9.6%
0 1 1 0 Roll-Off compensation 7.8%
0 1 1 1 Roll-Off compensation 6.0%
1 0 0 0 Roll-Off compensation not allowed
1 0 0 1 Roll-Off compensation 4,7%
1 0 1 0 Roll-Off compensation 2.9%
1 0 1 1 Roll-Off compensation 1.3%
1 1 0 0 Roll-Off compensation -0.2%
1 1 0 1 Roll-Off compensation -1.8%
59/75