JVC KD-S785 Service Manual page 32

KD-S785
TB2118F-X (IC31) : PLL
1.Terminal Layout
2.Block diagram
osc Buff.
2
1
XO
24
XI
FM VCO
15
AMP
AMVCO
16
AMP
IFC 13 AMP
CE
3
DIN
4
CK
5
DOUT
6
3.Pin Function
Pin
Symbol I/O Function
No.
1 XOUT O Crystal oscillator pin
2 OSC - Non connect
3 CE I Chip enable input
4 DI I Serial data input
5 CK I Clock input
6 DOUT O Serial data output
7 SR O Register control pin
8 I/01 I/O I/O ports
9 I/02 I/O I/O ports
10 OUT1 - Non connect
11 OUT2 - Non connect
12 VDD2 - Single power supply for REF. frequency block
1-32
ON/OFF
OSC circuit
Reference Counter
Prescaler
20-bit BINARY COUNTER
Resistor 1
Resistor 2
Serial
Interface
I/O PORT
8
7
SL I/O -1
Phase
Comparator
4-bit
Swallow counter
12-bit
Programmable counter
22-bit
40bit shift register
OUTPUT PORT
Vdd
10 11 12
9 14
vdd
out-1 out-2
I/O -2 vdd2
Pin
Symbol I/O
No.
13 IFC
14 VDD
15 FMIN
16 AMIN
17 DGND
18 FMCP
19 Vt
20 AMCP
21 VCC
22 RF
23 AGND
24 XIN
Constant
power supply voltage
AM CP.
20
switch
22
19
Vt
+
-
18
FM cp
switch
Vcc
17 21
23
a-gnd
d-gnd vcc
Function
I IF signal input
- Power pins for digital block
I FM band local signal input
I AM band local signal input
- Connect to GND (for digital circuit)
O Charge pump output for FM
- Tuning voltage biased to 2.5V.
O Charge pump output for AM
- Power pins for analog block
I Ripple filter connecting pin
- Connect to GND (for analog circuit)
I Crystal oscillator pin
RF