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TDA7421 Datasheet(PDF) 24 Page - STMicroelectronics

Part # TDA7421
Description  AM/FM TUNER FOR CAR RADIO AND Hi-Fi APPLICATIONS
PDF  38 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7421 Datasheet(HTML) 24 Page - STMicroelectronics

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IF COUNTER REFERENCE CONTROL 2 (MSB) AND IF COUNTER MODE SELECT
MSB
LSB
FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
0000
000
0
MSB = 0
0000
000
1
MSB = 256
0000
001
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
IF COUNTER CONTROL 1
MSB
LSB
FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
don’t use
0
0
1
don’t use
0
1
0
don’t use
0
1
1
EW delta f =
±6.25KHz (FM); ±1KHz (AM)
1
0
0
EW delta f =
±12.5KHz (FM); ±2KHz (AM)
1
0
1
EW delta f =
±25KHz (FM); ±4KHz (AM)
1
1
0
EW delta f =
±50KHz (FM); ±8KHz (AM)
1
1
1
EW delta f =
±100KHz (FM); ±16KHz (AM)
0
IF counter disabled / stand by
1
IF counter enabled
IFENA
EW2
EW1
EW0
Bit name
Subaddress = 08H
TDA7421
24/38



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