JVC KD-LH7R Service Manual page 38

KD-LH7R
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TB2118F-X (IC31) : PLL
1.Terminal Layout
2.Block diagram
osc Buff.
2
1
XO
OSC circuit
24
XI
FM VCO
15
AMP
AMVCO
16
AMP
IFC 13 AMP
TE
L 13942296513
CE
3
DIN
4
Interface
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
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10 OUT1 - Non connect
11 OUT2 - Non connect
12 VDD2 - Single power supply for REF. frequency block
1-38
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ON/OFF
Reference Counter
Prescaler
20-bit BINARY COUNTER
Resistor 1
Resistor 2
Serial
I/O PORT
8
7 9
I/O -1 I/O -2
SL
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8
power supply voltage
Phase
Comparator
4-bit
Swallow counter
12-bit
Programmable counter
Q Q
3 6 7 1 3
22-bit
40bit shift register
OUTPUT PORT
Vdd
10 11 12 17
14
vdd d-gnd
out-1 out-2
vdd2
Pin
Symbol I/O
No.
13 IFC I IF signal input
14 VDD - Power pins for digital block
15 FMIN I FM band local signal input
I AM band local signal input
16 AMIN
17 DGND - Connect to GND (for digital circuit)
18 FMCP O Charge pump output for FM
19 Vt - Tuning voltage biased to 2.5V.
20 AMCP O Charge pump output for AM
21 VCC - Power pins for analog block
I Ripple filter connecting pin
22 RF
23 AGND - Connect to GND (for analog circuit)
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24 XIN I Crystal oscillator pin
.
2 9 9 4 2 8
Constant
AM CP.
20
switch
RF
22
19
Vt
1 5 0 5 8 2 9 9 4
+
-
18
FM cp
switch
Vcc
21
23
a-gnd
vcc
Function
m
co
9 9
2 8 9 9