JVC KW-XC828 Service Manual page 57

TB2118F-X (IC21) : PLL
1.Terminal Layout
2.Block diagram
NC Buff.
2
ON/OFF
1
XO
OSC circuit
24
XI
FM VCO
15
AMP
AMVCO
16
AMP
IFC 13 AMP
CE
3
DIN
4
Serial
Interface
DOUT
5
DIMM 6
3.Pin Function
Pin
Symbol I/O Function
No.
XOUT
1 O Crystal oscillator pin
2 NC - 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 O1 - Non connect
11 O2 - Non connect
12 VDD2 - Single power supply for REF. frequency block
Reference Counter
4-bit
Prescaler
Swallow counter
12-bit
Programmable counter
20-bit BINARY COUNTER
Resistor 1
22-bit
Resistor 2
I/O PORT
OUTPUT PORT
8 10
7 9
out-1 out-2
I/O -1 I/O -2
SL
Constant
power supply voltage
Phase
Comparator
switch
40bit shift register
switch
Vdd
Vcc
11 12 17 21
14
vdd d-gnd vcc a-gnd
vdd2
Pin
Symbol I/O Function
No.
IFC I IF signal input
13
14 VDD - Power pins for digital block
15 FMIN I FM band local signal input
16 AMIN I AM band local signal input
17 DGND - Connect to GND (for digital circuit)
18 FMCP O Charge pump output for FM
19 VT - Tuning voltage biased to 2.5V.
O Charge pump output for AM
20 AMCP
21 VCC - Power pins for analog block
22 RF I Ripple filter connecting pin
23 AGND - Connect to GND (for analog circuit)
24 XIN I Crystal oscillator pin
KW-XC828
AM CP.
20
REG.
22
19
vt
+
-
18
FM cp
23
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