-7-
IC Block Diagrams
IC3601 < MTS Decoder > CXA2104S
2
1
3
4
6
5
7
8
10
9
12
13
14
17
18
19
20
21
MAIN IN
27
15
16
11
MAIN OUT
SAP IN
ST IN
SUB OUT
PCINT1
COMP IN
Vcc
PLINT
PCINT2
NOISETC
SAPTC
SAP OUT
IREF
VG
R
DGND
SCL
SD
A
30
LPF
MATRIX
VCA
RMSDET
RMSDET
SPECTRAL
VE
HPF
LPF
LPF
DeEm
AMP
(+4dB)
SW
LOGIC
NRSW/FOMO/SAPC
IREF
I
2
C BUS I/F
LPF
BPF
SAPVCO
SAPIND
NOISE
DET
"PONRES"
"SAP"
"NOISE"
VCA
WIDE BAND
1/2
LPF
LPF
LPF
STIND
DeEm
VCA
VCO
1/4
LFLT
STLPF
FLT
ATT/INSW
(+6dB)
"STEREO"
VE
VEWGT
VETC
VEOUT
VCAIN
VCA
WGT
VCA
TC
TVOUT-L
TVOUT-R
SOUT
22
23
28
24
25
26
GND
IC3451 < Audio processor > STV8216
2
1
10
9
14
18
19
15
MONO IN
62
SIF
23
28
24
Sound IF
73
78
AL1L
AL1R
AL2L
AL2R
AL3L
AL3R
Input Scar
ts
0.5V
rms
2V
rms
2V
rms
2V
rms
Audio
Stereo
A/D
Input Analog A
u
dio Matr
ix
AGC
A/D
Multi-Standard
Digital Stereo
Demodulator
FM, AM, A2
& NICAM
Demodulation
69
52
IRQ
ST
Interr
upt
Request
Stereo
Flag
Source preprocessing
Stereo
Flag
Digital A
udio Matr
ix
I
2
S Interface
I
2
C Interface
63
61
SDO
WS
64
WS
40 39
SD
A
SCL
B
US0
(BBE)
68 65
B
US1
(MA
CH-3)
HPD
35
Headphone
Detection
Audio Processing
Loudspeaker Audio Processing
Smart Volume Control, ST Wide
Surround, 5-band Equalizer &
Loudness, Beeper & Subwoofer Out
Headphone Audio Processing
Smart Volume Control,
Bass/Treble & Beeper
Audio Matrixing
Signal Crystal
Clock generation
Power Supply Management
DC Regulators, Standby mode
XTI
XT
O
30
53
LSL
LSR
SW
HPR
AO1L
AO1R
Audio
Stereo
D/A
Audio
Stereo
D/A
Audio
Stereo
D/A
Vol.
Bal
Gain
Vol.
Bal
Output Analog
Au
d
io matr
ix
Low Noise
Audio
Mute
Low Noise
Audio
Mute
Low Noise
Audio
Mute
Low Noise
Audio
Mute
1V
rms
2V
rms
2V
rms
Loudspeaker
AO2L
AO2R
HPL
29
1V
rms
32
31
I
2
C Bus Expander
Headphone
Output Scar
ts
Sub woofer
