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TDA7540B Datasheet, PDF (45/75 Pages) STMicroelectronics – AM/FM Car Radio Tuner IC with Stereo Decoder and Intelligent Selectivity System (ISS)
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TDA7540B
Software specification
Table 16. Addr 5 IF Counter Control 1
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0
0
0 tSample = 20.48ms (FM)128ms (AM )
0
0
1 tSample = 10.24ms (FM)64ms (AM )
0
1
0 tSample = 5.12ms (FM)32ms (AM )
0
1
1 tSample = 2.56ms (FM)16ms (AM )
1
0
0 tSample = 1.28ms (FM)8ms (AM )
1
0
1 tSample = 640µs (FM)4ms (AM )
1
1
0 tSample = 320µs (FM)2ms (AM)
1
1
1 tSample = 160µs (FM)1ms (AM )
0
IF counter disable / stand by
1
IF counter enable
00
Not valid
01
IF counter FM mode
10
IF counter AM mode (450KHz)
11
IF counter AM mode (10.7MHz)
0
Disable mute & AGC on hold in FM mode
1
Enable mute & AGC on hold in FM mode
0
Lock detector disable
1
Lock detector enable
Table 17. Addr 6 IF Counter Control 2
MSB
LSB
d7 d6 d5 d4 d3 d2 d1 d0
Function
0 0 0 0 0 fCenter = 10.60625MHz (FM) / 10.689MHz ; 449KHz (AM)
0
0
0
0
1 fCenter = 10.61250MHz (FM) / 10.690MHz ; 450KHz (AM)
-
-
-
-
-
-
-
--
0
1
0
1
1 fCenter = 10.67500MHz (FM) / 10.700MHz ; 460KHz (AM)
0
1
1
0
0 fCenter = 10.68125MHz (FM) / 10.701MHz ; 461KHz (AM)
0 1 1 0 1 fCenter = 10.68750MHz (FM) / 10.702MHz ; 462KHz (AM)
0
1
1
1
0 fCenter = 10.69375MHz (FM) / 10.703MHz ; 463KHz (AM)
0
1
1
1
1 fCenter = 10.70000MHz (FM) / 10.704MHz ; 464KHz(AM)
-
-
-
-
-
-
-
--
1
1
1
1
1 fCenter = 10.80000MHz (FM) / 10.720MHz ;480KHz (AM)
000
Not valid
001
Not valid
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