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TDA7421 Datasheet(PDF) 32 Page - STMicroelectronics

Part # TDA7421
Description  AM/FM TUNER FOR CAR RADIO AND Hi-Fi APPLICATIONS
PDF  38 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7421 Datasheet(HTML) 32 Page - STMicroelectronics

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FM SOFT MUTE / FM AUDIO MUTE GAIN (subaddress 08H)
MSB
LSB
FUNCTION
FSM3
FSM2
FSM1
FSM0
AUM2
AUM1
AUM0
fmsoftmute
MSB
fmsoftmute fmsoftmute fmsoftmute
LSB
buff1 gain
MSB
buff1 gain buff1 gain
LSB
FM SOFT MUTE
THRESHOLD
0
0
0
0
Maximum sensitivity
XXXX
• • •
1
1
1
1
Minimum sensitivity
all combinations allowed
Audio max mute atten.
(dB) with bit FMHIGH
byte 0 = 1
0
0
1
-2.5
010
-5
1
0
0
-7.5
011
-10
110
-12.5
111
-15
Audio max mute atten.
(dB) with bit FMHIGH
byte 0 = 0
001
-17.5
010
-20
100
-22.5
011
-25
110
-27.5
111
-30
all else not allowed
FM HOLE DETECTOR / FM DETUNING DETECTOR (subaddress 09H)
MSB
LSB
FUNCTION
BWM2
BWM1
BWM0
HDM4
HDM3
HDM2
HDM1
HDM0
BW MSB
BW
BW LSB
Hole det
MSB
Hole det
Hole det
Hole det
Hole det
LSB
MUTING SENSITIVITY
0
0
0
0
0
Minimum (deep hole)
X
XXXX
• • •
1
1
1
1
1
Maximum (shallow hole)
all combinations allowed
RECEPTION
DETUNING MUTE RANGE
0
0
1
10 (KHz)
0
1
0
15 (KHz)
1
0
0
30 (KHz)
all else not allowed
SEEK
CLAMPING WINDOW
0
0
0
Minimal Window
X
X
X
Intermediate values
1
1
1
Maximal Window
all combinations allowed
TDA7421
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