JVC UX-M55 Service Manual page 34

UX-M55
TC9257F (IC102) : PLL frequency synthesizer
1. Terminal layout
XT 1 20 FM VT
XT 2 19 AM VT
PRD 3 18 B1
CLK 4 17 B0
DATA 5 16 IF
MUTE 6 15 GND
TUNER 7 14 FM OSC
CD 8 13 AM OSC
AUX 9 12 VDD
ST MONO 10 11 EE
2. Block diagram
FM L
AMP
14
1/2
FM OSC
FM H
13
AM OSC
2
XT
CIRCUIT
1
XT
5
DATA
4
CLK
3
PRD
3. Pin function
Pin No. Symbol I/O
1 XT
2 XT O
3 PRD
4 CLK
5 DATA I/O
6 MUTE O
7 TUNER O
8 CD O
9 AUX O
10 ST MONO I/O
1-34
PSC
2 MODULUS 4bit SWALLOW
PRESCALER
HF
12bit PROGRAMMABLE COUNTER
FM MODE LF
OSC
REFERENCE COUNTER
OSC
1ms
24bit REGISTER
24bit SHIFT REGISTER
4
TEST
ADDRESS
DECODER
24bit REGISTER
4
OUTPUT PORT
OT-4
6 7 8 9
MUTE CD
TUNER AUX
Function
I Crystal oscillator pins
Crystal oscillator pins
I Period signal input
I Clock signal input
Serial data input/output
General-purpose output port
General-purpose output port
General-purpose output port
General-purpose output port
General-purpose I/O port
VDD
12
POWER ON
COUNTER
RESET
12
4
MAX
15
4
UNLOCK
5
24 22
10
4
20bit BINARY COUNTER
UNIVERSAL COUNTER CONTROL
XT 1ms
Pin No. Symbol
11 EE
12 VDD
13 AM OSC
14 FM OSC
15 GND
16 IF
17 B0
18 B1
19 AM VT
20 FM VT
GND
15
RESET
TRI-STATE
19
AM VT
BUFFER
TRI-STATE
20
FM VT
BUFFER
OT4
10
ST MONO
5
11
EE
16
IF
AMP
17
B0
AMP
GATE
18
B1
I/O Function
I/O General-purpose I/O port
- Power supply pin
I Programmable counter input
I Programmable counter input
- Ground pin
I/O General-purpose I/O port
I/O General-purpose I/O port
I/O General-purpose I/O port
O Phase comparator output
O Phase comparator output