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TDA7541 数据表(PDF) 55 Page - STMicroelectronics |
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TDA7541 数据表(HTML) 55 Page - STMicroelectronics |
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55 / 76 page  TDA7541 Software specification 55/76 Table 26. Addr 10 Quality MUX/FSU (FM 0Eh , AM 0Fh) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 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 1 Not used 1 Not used SSTH<7:4> 0 0 0 0 SSTOP = IFC (IF counter status) 0 0 0 1 SSTOP = H if IFC = H & FS > (FM: 0.6V / AM: 1.2V) 0 0 1 0 SSTOP = H if IFC = H & FS > 0 0 1 1 SSTOP = H if IFC = H & FS > 0 1 0 0 SSTOP = H if IFC = H & FS > -- - - 1 1 1 1 SSTOP = H if IFC = H & FS > (FM: 4.1V / AM: 4.8V) Table 27. Addr 11 Weak Signal Mute (FM A8h) MSB LSB Function d7 d6 d5 d4 d3 d2 d1 d0 ISSON 0 ISS filter internal control 1 ISS filter forced “ON” WBON 0 Weather band disable 1 Weather band enable WMTH<4:2> 0 0 0 Startpoint mute 0 0 0 1 Startpoint mute 1 0 1 0 Startpoint mute 2 --- - 1 1 0 Startpoint mute 6 1 1 1 Startpoint mute 7 WMD<7:5> 0 0 0 Mute depth 0 0 0 1 Mute depth 1 -- - - 1 0 1 Mute depth 5 -- - - 1 1 1 Mute depth 7 |
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