JVC KD-SX950 Service Manual page 26

TB2118F-X (IC21) : PLL
1.Terminal Layout
2.Block diagram
osc Buff.
2
1
XO
24
XI
FM VCO
15
AMVCO
16
IFC 13
CE
3
DIN
4
DOUT
5
DIMM
6
3.Pin Function
Pin
Symbol I/O
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
-
ON/OFF
OSC circuit
Reference Counter
AMP
Prescaler
AMP
AMP
20-bit BINARY COUNTER
Resistor 1
Resistor 2
Serial
Interface
I/O PORT
8
7
I/O -1
SL
Function
Phase
Comparator
4-bit
Swallow counter
12-bit
Programmable counter
22-bit
40bit shift register
OUTPUT PORT
10 11 12
9
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
switch
+
-
switch
Vdd
Vcc
17
21
14 23
vdd d-gnd vcc a-gnd
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)
Crystal oscillator pin
I
AM CP.
20
REG.
22
19
vt
18
FM cp