TDA7540N Datasheet, PDF (50/76 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system (ISS)

Software specification
TDA7540N
Table 22. Addr 10 quality detection multipath
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0 Multipath control “ON”
1 Multipath control “OFF”
0
MP bandpass frequency 19KHz if MPION=1, NBSMP=1,
MPPC=1, than has to be 0
1
0
MP bandpass frequency 31KHz
MP gain 12dB
1
MP gain 23dB
00
MP threshold 0.50V
01
10
MP threshold 0.75V
MP threshold 1.00V
11
MP threshold 1.25V
00
Application mode 1
01
Application mode 2
0
Multipath eliminates ac
1
Multipath eliminates ac and ac+
Table 23. Addr 11 quality deviation detection
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0 0 0 charge current 39µA, discharge current 1µA
0 0 1 charge current 38µA, discharge current 2µA
0 1 0 charge current 37µA, discharge current 3µA
0 1 1 charge current 36µA, discharge current 4µA
-
-
--
1 1 1 charge current 32µA, discharge current 8µA
00
DEV threshold for ISS narrow/wide 30kHz
01
DEV threshold for ISS narrow/wide 45kHz
10
DEV threshold for ISS narrow/wide 60kHz
11
DEV threshold for ISS narrow/wide 75kHz
00
DEV threshold for ISS filter “OFF” ratio 1.5
01
DEV threshold for ISS filter “OFF” ratio 1.4
10
DEV threshold for ISS filter “OFF” ratio 1.3
11
DEV threshold for ISS filter “OFF” ratio 1
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