TDA7540B Datasheet, PDF (60/75 Pages) STMicroelectronics – AM/FM Car Radio Tuner IC with Stereo Decoder and Intelligent Selectivity System (ISS)

Software specification
TDA7540B
Table 41. Addr 30 Stereodecoder 7 (continued)
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
1 1 1 0 Roll-Off compensation -3.4%
1 1 1 1 Roll-Off compensation -5%
000
Level gain 0dB
001
Level gain 0.67dB
010
Level gain 1.34dB
-
-
-
111
-
Level gain 4.7dB
0
AM audio filter “OFF”
1
AM audio filter “ON”
Table 42. Addr 31 Stereodecoder 8
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0 0 Quality noise gain =6dB
0 1 Quality noise gain =9dB
1 0 Quality noise gain =12dB
1 1 Quality noise gain =15dB
0
1
0
1
Enable AFS PIN
Disable AFS PIN
AFS inluence on stereodecoder mute
No AFS inluence on stereodecoder mute
0
1
0
1
0
PD hold activation if AFS<V_th1
PD hold activation if AFS<V_th2
AM audio noise blanker high pass filter frequency 10KHz
AM audio noise blanker high pass filter frequency 20KHz
AM audio noise blanker high pass filter order 1st
1
0
1
AM audio noise blanker high pass filter order 2nd
AM audio delay for noise blanking “OFF”
AM audio delay for noise blanking “ON”
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