TDA7540N Datasheet, PDF (51/76 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system (ISS)

TDA7540N
Software specification
Table 23. Addr 11 quality deviation detection
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0
Disable ISS filter to fixed bandwith (ISS80) in automatic
control
1
Enable ISS filter to fixed bandwith (ISS80) in automatic
control
Table 24. Addr 12 softmute control 1
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0 0 0 Startpoint mute 0 in application about 3dBµV antenna level
0 0 1 Startpoint mute 1 in application about 4dBµV antenna level
-
-
--
1 1 1 Startpoint mute 7 in application about 10dBµV antenna level
0000
Mute depth 0 in application 18dB
0001
Mute depth 1 in application 20dB
0010
Mute depth 2 in application 22dB
0011
Mute depth 3 in application 24dB
-
-
-
-
1111
- (logarithmically behaviour)
Mute depth 15 in application 36dB
0
FM mute disable, (has to be 0 in AM mode)
1
FM mute enable
Table 25. Addr 13 softmute control 2
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0 Disable mute threshold for ISS filter “ON”
1 Enable mute threshold for ISS filter “ON”
00
AC mute depth 10dB
01
AC mute depth 8dB
10
AC mute depth 6dB
11
AC mute depth 4dB
0000
AC mute threshold 60mV
0001
AC mute threshold 80mV
0010
AC mute threshold 100mV
-
-
-
-
-
0111
AC mute threshold 340mV
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