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IC BLOCK DIAGRAM & DESCRIPTION
IC222 TC9257F (Tuner PLL IC)
FM
L
AMP
2 MODULUS
FM
1/ 2
IN
PRESCALER
FM
HF
H
AM
IN
FM
XT
OSC
CIRCUIT
XT
1ms
DATA
CLOCK
PERIOD
OUTPUT PORT
OT-1
IC440 AN7348K (Play /Rec Pre Amp)
24
A/Rec
B
A/Rec
B
1
PSC
4bit SWALLOW
COUNTER
12bit PROGRAMMABLE COUNTER
MODE LF
4
REFERENCE COUNTER
OSC
24bit REGISTER
24bit SHIFT REGISTER
8
TEST
ADDRESS
24
DECODER
24bit REGISTER
4
4
20bit BINARY COUNTER
UNIVERSAL COUNTER CONTROL
OT-4
XT
OT-3
OT-2
OT-4
23
22
21
20
Mute
PB Amp(L)
PB Amp(R)
Mute
2
4
3
V
GND
DD
POWER ON
RESET
RESET
TRI-STATE
BUFFER
12
TRI-STATE
MAX
BUFFER
15
4
OT-4
UNLOCK
5
5
22
10
GATE
1ms
19
18
17
ALC
Amp(L)
Amp(R)
Logic
A/B
5
6
7
8
- 14 -
DO1
DO2
XT
1
(DO2 / OT-4)
XT
2
PERIOD
3
CLOCK
4
I/O-5
/CLK
DATA
5
OT-1
6
I/O-6
OT-2
7
OT-3
8
OT-4
9
I/O-5
10
/CLK
I/O-9 / IF
IN2
(I/O-6 / IF
)
IN2
AMP
I/O-8 / IF
IN1
(I/O-5 / IF
)
IN1
AMP
I/O-7 / SC
IN
16
14
15
R
P
P
R
Rec
Nor/Cro
& Hi/Lo
Logic
Rec
R
P
Rejection
Logic
Rec/PB
9
10
11
20 DO2
19 DO1
I/O-7
18
/SCIN
17 I/O-8
/IFIN1
16 I/O-9
/IFIN2
15 GND
14 FM
IN
13 AM
IN
12
V
DD
11
I/O-6
13
Ripple
12
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