TDA7421N Datasheet, PDF (34/38 Pages) STMicroelectronics – AM/FM TUNER FOR CAR RADIO AND HI-FI APPLICATIONS

TDA7421N
7.8 FM DEMODULATOR ADJUSTMENT (subaddress 06H)
MSB
LSB
FUNCTION
DEM6 DEM5 DEM4 DEM3 DEM2 DEM1 DEM0
demadj demadj demadj demadj demadj demadj demadj ADJUSTMENT CAPACITOR
MSB
LSB
0
0
0
0
0
0
00
0
0
0
0
0
0
1
C_{demod (= 50fF)}
0
0
0
0
0
1
0
2C_demod
0
0
0
0
1
0
0
4C_demod
0
0
0
1
0
0
0
8C_demod
0
0
1
0
0
0
0
16C_demod
0
1
0
0
0
0
0
32C_demod
1
0
0
0
0
0
0
64C_demod
1
1
1
1
1
1
1
127C_demod
all combinations allowed
7.9 FM SOFT MUTE / FM IF AMPLIFIER/FM AUDIO MUTE GAIN (subaddress 07H)
MSB
LSB
FUNCTION
FSM3 FSM2 FSM1 FSM0 FBL1 FBL0 AUM1 AUM0
FM
FM
FM
FM
softmute softmute softmute softmute
MSB
LSB
buff2
gain
buff2
gain
Mute
Depth
MSB
Mute FM SOFT MUTE THRESHOLD
Depth
LSB
0
0
0
0
Maximum sensitivity
X
X
X
X
1
1
1
1
Minimum sensitivity
all combinations allowed
Audio max mute attenuation
0
0 -5
0
1 -7.5
1
0 -10
1
1 -12.5
all comb. allowed
Buffer 2 Gain (dB)
0
0
10
0
1
6
1
0
8
all else not allowed
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