TDA7546 Datasheet, PDF (43/68 Pages) STMicroelectronics – Multichip module for TMC tuner applications

TDA7546
Software specifications
Table 19. Addr 8 quality ISS filter
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0 ISS filter control “ON”
1 ISS filter control “OFF”
0
Switch ISS filter “OFF”
1
Switch ISS filter “ON”
0
Switch “OFF” ISS filter 120KHz
1
0
Switch “ON” ISS filter 80KHz
Switch “OFF” ISS filter 30KHz for weatherband
1
Switch “ON” ISS filter 30KHz for weatherband
0
Disable TV offset for weather band
1
0 00
0 01
Enable TV offset for weather band (+4V)
discharge current1μA, charge current mid 74μA narrow124μA
discharge current3μA, charge current mid 72μA narrow122μA
0 10
0 11
discharge current 5μA, charge current mid 70μA narrow 120μA
discharge current 7μA, charge current mid 68μA narrow 118μA
- --
1 11
-
discharge current 15μA,charge current mid 60μA narrow 110μA
Table 20. Addr 9 quality detection adjacent channel
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0/1 Not valid
0
AC highpass frequency 100KHz
1
AC bandpass frequency 100KHz
0
AC gain 32dB
1
AC gain 38dB
000
001
AC wide band threshold 0.25V
AC wide band threshold 0.35V
010
AC wide band threshold 0.45V
-
-
-
-
111
AC wide band threshold 0.95V
00
01
AC narrow band threshold 0.0V
AC narrow band threshold 0.1V
10
AC narrow band threshold 0.2V
11
AC narrow band threshold 0.3V
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