JVC KS-FX945R Service Manual page 33

6.11 TB2118F-X (IC31) : PLL
• Terminal Layout
• Block diagram
osc
2
1
XO
24
XI
FM VCO
15
AMVCO
16
IFC 13
CE
3
DIN
4
CK
5
DOUT 6
• 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 24
Buff.
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
SL I/O -1
Function
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 I IF signal input
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.
20 AMCP O Charge pump output for AM
21 VCC - Power pins for analog block
22 RF I Ripple filter connecting pin
23 AGND - Connect to GND (for analog circuit)
XIN I Crystal oscillator pin
Constant
power supply voltage
AM CP.
20
switch
RF
22
19
Vt
+
-
18
FM cp
switch
Vcc
17 21
23
a-gnd
d-gnd vcc
Function
(No.49875)1-33