TDA7540N Datasheet, PDF (60/76 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system (ISS)

Software specification
TDA7540N
Table 39. Addr 27 stereodecoder 4 (continued)
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
10
Stop level High Cut at 25.7% VHCH
11
0
Stop level High Cut at 33% VHCH
Strong multipath influence on peak discharge OFF
1
Strong multipath influence on peak discharge ON (MPF = 0!!)
Table 40. Addr 28 stereodecoder 5
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0 0 0 Stereoblend control at 29% REF5V
0 0 1 Stereoblend control at 33% REF5V
0 1 0 Stereoblend control at 38% REF5V
0 1 1 Stereoblend control at 42% REF5V
1 0 0 Stereoblend control at 46% REF5V
1 0 1 Stereoblend control at 50% REF5V
1 1 0 Stereoblend control at 54% REF5V
1 1 1 Stereoblend control at 58% REF5V
00
01
Audio noise blanker field strength adjust 2.0V
Audio noise blanker field strength adjust 1.6V
10
Audio noise blanker field strength adjust 1.4V
11
Audio noise blanker field strength adjust OFF
00
Quality detector coefficient a=0.6
01
10
Quality detector coefficient a=0.75
Quality detector coefficient a=0.9
11
Quality detector coefficient a=1.05
0
Multipath influence on peak discharge OFF
1
Multipath influence on peak discharge ON (-1V/ms) (MPF = 0!!)
Table 41. 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
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