JVC MX-KA6 Series Service Manual page 32

MX-KA6
LC72136N (IC2) : PLL Frequency synthesizer
1.Terminal layout
XTI
FM
CE
DI
CLOCK
DO
VCOSTOP
AM/FM
LW
MW
SDIN
2. Block diagram
1
22
16
15
3
4
C B
2
I/F
5
6
Power
on
17
Reset
21
3. Pin function
Pin
I/O
No. Symbol
XTI I
1
FM O
2
I
3 CE
DI I
4
I
5 CLOCK
DO O
6
O
7 VCOSTOP
AM/FM O
8
-
9 NC
NC -
10
SDIN I/O
11
1-32
1
XT
22
2
GND
21
3
LPFI
20
4
LPFO
19
5
PD
18
6 VCC
17
7 FMIN
16
8 AMIN
15
9 NC
14
10 IFCNT
13
11 IFIN
12
Reference
Driver
Swallow Counter Swallow Counter
1/2
1/16,1/17 4bit 1/16,1/17 4bit
12bit
Programmable
DriverS
Data Shift Register & Latch
11
7 8 2
Function
X'tal oscillator connect (75KHz)
LOW:FM mode
When data output/input for 4pin(input) and
6pin(output): H
Input for receive the serial data from
controller
Sync signal input use
Data output for Controller
Output port
"Low": MW mode
Open state after the power on reset
Input/output port
Input/output port
Data input/output
Phase
Detector
18
Charge Pump
19
20
Unlock
Detector
12
Universal
Counter
13
Pin
Symbol I/O
No.
12 IFIN
13 IFCNT O
NC
14
15 AMIN
FMIN
16
17 VCC
PD O
18
LPFO O
19
LPFI
20
21 GND
22 XT
Function
IF counter signal input
I
IF signal output
Not use
-
AM Local OSC signal output
I
FM Local OSC signal input
I
Power supply(VDD=4.5 5.5V)
-
When power ON:Reset circuit move
PLL charge pump output(H: Local OSC
frequency Height than Reference frequency.
L: Low Agreement: Height impedance)
Output for active lowpassfilter of PLL
Input for active lowpassfilter of PLL
I
Connected to GND
-
X'tal oscillator(75KHz)
I