TDA7541 Datasheet, PDF (49/76 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system

TDA7541
Software specification
Table 20. Addr 4 TV/IF Counter (FM ACh , AM 1Ch)
Addr25 MSB
LSB
d7 d6 d7 d6 d5 d4 d3 d2 d1 d0
Function
TVM
0 TV is tracking with PLL
1 TV is independing on PLL
TVO+
0
Disable additional TV offset
1
Enable additional TV offset + 3.175V
ISSENA
0
ISS Filter switched off (bypass of filter, wide)
1
ISS filter control enable
IFS<4:3>
1
00
t_Sample = 20.48ms (FM) 128ms (AM )
1
01
t_Sample = 10.24ms (FM) 64ms (AM )
1
10
t_Sample = 5.12ms (FM) 32ms (AM )
1
11
t_Sample = 2.56ms (FM) 16ms (AM )
0
00
t_Sample = 1.28ms (FM) 8ms (AM )
0
01
t_Sample = 0.64ms (FM) 4ms (AM )
0
10
t_Sample = 0.32ms(FM) 2ms (AM )
0
11
t_Sample = 0.16ms (FM) 1ms (AM )
EW<6:5>
1
00
Δf = 12.5kHz (FM) 2kHz (AM)
1
01
Δf = 25kHz (FM) 4kHz (AM)
1
10
Δf = 50kHz (FM) 8kHz (AM)
1
11
Δf = 100kHz (FM) 16kHz (AM)
0
00
Not valid
0
01
Not valid
0
10
Not valid
0
11
Δf = 6.25kHz (FM) 1kHz (AM)
FMON
0
Select AM mode
1
Select FM mode
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