TDA7540N Datasheet, PDF (59/76 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system (ISS)

TDA7540N
Software specification
Table 38. Addr 26 stereodecoder 3
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0 0 0 Audio noise blanker low threshold 280mV
0 0 1 Audio noise blanker low threshold 261mV
0 1 0 Audio noise blanker low threshold 242mV
0 1 1 Audio noise blanker low threshold 223mV
1 0 0 Audio noise blanker low threshold 204mV
1 0 1 Audio noise blanker low threshold 185mV
1 1 0 Audio noise blanker low threshold 166mV
1 1 1 Audio noise blanker low threshold 147mV
00
Audio noise blanker noise controlled threshold 1200mV
01
Audio noise blanker noise controlled threshold 950mV
10
Audio noise blanker noise controlled threshold 700mV
11
Audio noise blanker noise controlled threshold 450mV
0
Audio noise blanker OFF
1
Audio noise blanker ON
00
Deviation adjust 2.0V
01
Deviation adjust 1.5V
10
Deviation adjust 1.0V
11
Deviation detector off
Table 39. Addr 27 stereodecoder 4
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0 High Cut OFF
1 High Cut ON
00
max. High Cut 10dB
01
max. High Cut 5.5dB
10
max. High Cut 7.5dB
11
00
max. High Cut 8.5dB
Start level High Cut at 42% REF5V
01
Start level High Cut at 50% REF5V
10
Start level High Cut at 58% REF5V
11
Start level High Cut at 66% REF5V
00
01
Stop level High Cut at 11% VHCH
Stop level High Cut at 18.3% VHCH
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