tda7421n STMicroelectronics, tda7421n Datasheet - Page 34

• Manufacturer Part Number: tda7421n
• Description: Am/fm Tuner For Car Radio And Hi-fi Applications
• Manufacturer: STMicroelectronics

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