TDA7512 Datasheet, PDF (30/42 Pages) STMicroelectronics – AM/FM CAR RADIO TUNER IC WITH INTELLIGENT SELECTIVITY SYSTEM ISS

TDA7512
2.3.13 Addr 13 Softmute Control 2
Table 21.
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
1111
AC mute “OFF”
0
AC mute filter 110KHz
1
AC mute filter 100KHz
2.3.14 Addr 14 VCODIV/PLLREF
Table 22.
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0 0 not valid (only for testing)
0 1 VCO frequency divided by 2
1 0 VCO frequency divided by 3
1 1 original VCO frequency
0
VCO” I” signal 0 degree
1
VCO “I” signal 180 degree
100
PLL reference frequency 50KHz
101
PLL reference frequency 25KHz
110
PLL reference frequency 10KHz
111
PLL reference frequency 9KHz
000
PLL reference frequency 2KHz
0
Select FM mode
1
Select AM mode
0
Select PLL low pass filter FM
1
Select PLL low pass filter AM
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