TDA7421N Datasheet, PDF (28/38 Pages) STMicroelectronics – AM/FM TUNER FOR CAR RADIO AND HI-FI APPLICATIONS

TDA7421N
6.8 IF COUNTER REFERENCE CONTROL 2 (MSB) AND IF COUNTER MODE SELECT
MSB
LSB
FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0 MSB = 0
0
0
0
0
0
0
0
1 MSB = 256
0
0
0
0
0
0
1
0 MSB = 512
all combinations allowed
1
1
1
1
0
1 MSB = 15616
1
1
1
1
1
0 MSB = 15872
1
1
1
1
1
1 MSB = 16128
0
0
NOT USED IN APPLICATION MODE
0
1
IF counter FM mode
1
0
IF counter AM mode
1
1
not used
IFCM1 IFCM0 IRC13 IRC12 IRC11 IRC10 IRC9 IRC8 Bit name
Subaddress = 07H
fosc/ftim = LSB + MSB + 1
6.9 IF COUNTER CONTROL 1
MSB
D7
D6
D5
D4
D3
0
1
IFENA
D2
0
0
0
0
1
1
1
1
EW2
D1
0
0
1
1
0
0
1
1
EW1
LSB
FUNCTION
D0
0 don't use
1 don't use
0 don't use
1 EW delta f = ±6.25KHz (FM); ±1KHz (AM)
0 EW delta f = ±12.5KHz (FM); ±2KHz (AM)
1 EW delta f = ±25KHz (FM); ±4KHz (AM)
0 EW delta f = ±50KHz (FM); ±8KHz (AM)
1 EW delta f = ±100KHz (FM); ±16KHz (AM)
IF counter disabled / stand by
IF counter enabled
EW0 Bit name
Subaddress = 08H
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