JVC UX-G6 Service Manual page 41

LC72136N (IC2) : PLL frequency synthesizer
1. Pin layout
XT 1
22
FM/AM 2
21
CE 3
20
DI 4
19
CLOCK 5
18
DO 6
17
FM/ST/VCO 7
16
AM/FM 8
15
9
14
10
13
SDIN 11
12
2. Block diagram
1
22
16
1/2
15
3
4
C B
2
I/F
5
6
Power
on
17
Reset
21
3. Pin function
Pin
I/O
No. Symbol
X'tal oscillator connect (75kHz)
XT I
1
LOW:FM mode
FM/AM O
2
When data output/input for 4pin(input) and
CE I
3
6pin(output): H
Input for receive the serial data from
DI I
4
controller
Sync signal input use
CLOCK I
5
Data output for Controller
O
6 DO
Output port
"Low": MW mode
FM/ST/VCO O
7
Open state after the power on reset
O
8 AM/FM
Input/output port
LW I/O
9
Input/output port
MW I/O
10
Data input/output
I/O
SDIN
11
XT
GND
LPFOUT
LPFIN
PD
VCC
FMIN
AMIN
IFCONT
IFIN
Reference
Driver
Swallow Counter Swallow Counter
1/16,1/17 4bit 1/16,1/17 4bit
12bit
Programmable
DriverS
Data Shift Register & Latch
11 13
7 8 2
Function
Phase
Detector
18
Charge Pump
19
20
Unlock
Detector
12
Universal
Counter
Pin
Symbol I/O
No.
IF counter signal input
IFIN I
12
IF signal output
13 IFCONT O
Not use
14 -
AM Local OSC signal output
AMIN I
15
FM Local OSC signal input
16 FMIN I
Power suplly(VDD=4.5-5.5V)
VCC -
17
When power ON:Reset circuit move
PLL charge pump output(H: Local OSC
18 PD O
frequency Height than Reference frequency.
L: Low Agreement: Height impedance)
Input for active lowpassfilter of PLL
LPFIN I
19
Output for active lowpassfilter of PLL
20 LPFOUT O
Connected to GND
21 GND -
X'tal oscillator(75KHz)
I
22 XT
UX-G6/FS-G6
Function
2-25