TDA7541B Datasheet, PDF (55/77 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system

TDA7541B
Software specification
Table 27. Addr 10 Quality MUX/FSU (FM 0Eh, AM 0Fh)
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
MUX<1:0>
0 0 Detected multipath information at PIN 23
-
-
-
-
-
-
0
1 Detected adjacent channel information at PIN 23
1 0 Quality information stereo decoder at PIN 23
1 1 FMON=1: Stereo indication at PIN 23
FMON=0: AM IF2 signal at PIN 23
SACCE
-
-
-
-
-
0-
- Strong adjacent channel correction disable
1
Strong adjacent channel correction enable
SACCT
-
-
-
-0
-
-
- Strong adjacent channel correction threshold = 2.9 V
1
Strong adjacent channel correction threshold = 3.0V
SSTH<7:4>
0
000
SSTOP = IFC (IF counter status)
0
001
SSTOP = H if IFC = H & FS > (FM: 0.6 V / AM: 1.2 V)
0
010
-
-
-
- SSTOP = H if IFC = H & FS >
0
011
SSTOP = H if IFC = H & FS >
0
100
SSTOP = H if IFC = H & FS >
1
111
SSTOP = H if IFC = H & FS > (FM: 4.1 V / AM: 4.8 V)
Table 28. Addr 11 Weak Signal Mute (FM A8h)
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
ISSON
-
-----
-
0 ISS filter internal control
1 ISS filter forced “ON”
WBON
-
- - - - - 0 - Weather band disable
1
Weather band enable
WMTH<4:2>
000
Startpoint mute 0
001
Startpoint mute 1
-
- - 010 -
- Startpoint mute 2
110
Startpoint mute 6
111
Startpoint mute 7
WMD<7:5>
0 00
Mute depth 0
0
01 -
-
-
-
- Mute depth 1
1 01
Mute depth 5
1 11
Mute depth 7
Doc ID 16048 Rev 1
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