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MPXDCFDB
CPOUT
OSCTNK
V
VCOGND
DGND
AFSAMPLE
FREF
TRDSMUTE
AMAFIF2
V
V
V
V
i.c.
41
OSCFDB
AFHOLD
RDSMPX FMMPX
DDA5
59
MODDET
DDA4
DDD
tune
42
DDA3
44
50
43
45 46
47
48 49
51
52 53
RDS
54
57
58
60
61
55
56
40
DAAIN
V
DDA6
AMPLIFIER
x1/ x15
POWER
SUPPLY
WB
VCO
TUNING SYSTEM
UPDATE
2
I C-bus
39 ANTENNA
DAA
62
63
DAATD
IFBWFLAG
SDA
AM STEREO
RDS
MUTE
2
MUX
I C-BUS
38
37
64
DAAOUT
SCL
AM
TEA6848H
2
TKEYEDAGC
TFMAGC
IFMAGC
I C-bus
IF
COUNT
AM
DEMOD
FM
AGC
36
35
2
LEVEL
I C-bus
WB/JAPAN/OIRT
34
33
FM
AM
WBFLAG
FMMIXIN2
i.c.
RFGND
÷1/ ÷2/
÷3
65
66
32
31
30
V
×
BUFFER
MPXOUT
IFBW
FM
IF2GND
90°
I/Q MIXER 1
67
FMMIXIN1
CINT
×
IF
FILTER
29
FM
DEMOD
BANDWIDTH
CONTROL
AM NOISE
DETECTOR
V
90°
ref(MIX)
FM
MIXER 2
68
MODETOUT
TACD
69
70
28
27
IAMAGC
LEVEL
V
THFAMAGC
level(AMFM)
71
72
73
26
25
XTAL1
2
TAFAMAGC
VAMCAS
I C-bus
CRYSTAL
PEAK/
AVERAGE
AM
20.5 MHz
XTALGND
÷2
OSCILLATOR
AGC
24
LEVEL
XTAL2
VAMCASFB
74
75
V
level(ACD)
2
×
AM
I C-
BLANK
PULSE
÷10/
÷20
LEVEL
DAA
STABI
ACDTHRES
bus
2
2
I C-bus
I C-bus
MIXER 2
23
76
77
78
AMMIX1IN
IREF
AMMIX2OUT1
×
AM
22
21
AMMIX2OUT2
MIXER 1
AMMIX1DEC
SWFLAG
79
80
CAGC
V
ref(lim)
14
13
17
12
11 10
20
19
18
16
15
9
8
7
5
4
3
2
1
6
MHC436
MIX1OUT2
IF2FILI
IFAMPDEC
IFAMPIN
V
AMNBHOLD AMIF2DEC FMLIMDCFDB1
AMIF2IN
IF1GND
DDA1
IFAMPOUT
MIX1OUT1
IF2FILQ
IREFFMIF2
FMLIMDCFDB2
V
DDA2
IFCDAATEST
FMMIX2DEC FMMIX2IN
COFFSET
Fig.1 Block diagram.
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NXP [ NXP ]
