TDA7402_07 Datasheet, PDF (62/71 Pages) STMicroelectronics – Car radio signal processor

I²C bus interface
TDA7402
Table 31. Noiseblanker II (24)
MSB
LSB
D₇ D₆ D₅ D₄ D₃ D₂ D₁ D₀
Function
PEAK charge current
0 low
1 high
00
01
10
11
Fieldstrength adjust
2.3V
1.8V
1.3V
OFF
00
01
10
11
Blank Time FM / AM
38µs / 1.2ms
25.5µs / 800µs
32µs / 1.0s
22µs / 640µs
00
01
10
11
0
1
Noise rectifier discharge resistor
R = infinite
R_DC = 56k
R_DC = 33k
R_DC = 18k
Strong multipath influence on PEAK 18k
off
on (18k discharge if V_MPout< 2.5V)
Table 32. AM / FM noiseblanker (25)
MSB
LSB
D₇ D₆ D₅ D₄ D₃ D₂ D₁ D₀
Function
Stereo decoder mode
0 FM
1 AM
000
001
010
011
100
101
110
111
AM rectifier gain
6dB
8dB
10dB
12dB
14dB
16dB
18dB
20dB
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