TDA7540B Datasheet, PDF (62/75 Pages) STMicroelectronics – AM/FM Car Radio Tuner IC with Stereo Decoder and Intelligent Selectivity System (ISS)

Software specification
TDA7540B
Table 49. Addr 38 Test Stereodecoder Control
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
x x x x x x x 0 Only for testing ( have to be set to 1)
Table 50. Addr39 FM Demodulator Spike Blanker And Stereo Decoder
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
x x x x x x x 0 Spike blanker testing “OFF”
1 Spike blanker testing “ON”
0
Spike blanker window mode: early + late
1
Spike blanker window mode: early - late
0
Spike blanker toggledetector disable
1
Spike blanker toggledetector enable
0
Spike blanker slow attack
1
Spike blanker fast attack
0
Spike blanker S&H mode: ignore restore
1
1
Spike blanker S&H mode: standard
Stereo decoder VCO ON (mandatory in FM mode)
0
Stereo decoder VCO OFF
0
Pilot cancellation mode: always
1
0
Pilot cancellation mode: if pilot > threshold
Stereo decoder VCO set456
1
Stereo decoder VCO free running
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