JVC UX-P55 Service Manual

1-36 (No.22036)
4.11 LA72723(IC3): RDS demodulation
• Pin layout
• Block Diagram
• Pin functions
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VREF
MPXIN
Vdda
Vssa
FLOUT
CIN
TES
XOUT
RDS-ID/READY
RDCL
RDDA
RST
MODE
Vddd
Vssd
XIN
Pin No. Symbol I/O Function
1 VREF O Reference voltage output (Vdda/2)
2 MPXIN I Baseband (multiplexed) signal input
3 Vdda - Analog power supply (+5V)
4 Vssa - Analog ground
5 FLOUT O Subcarrier input (filter output)
6 CIN I Subcarrier input (comparator input)
7 TEST I Test input
8 XOUT O Crystal oscillator output (4.332MHz)
9 XIN I Crystal oscillator input (exeternal reference input)
10 Vssd - Digtal ground
11 Vddd - Digtal power supply
12 MODE I Read mode setting (0:master, 1:slave)
13 RST I RDS-ID/RAM reset (positive polarity)
14 RDDA O RDS data output
15 RDCL I/O RDS clock output (master mode)/RDS clock input (slave mode)
16 RDS-ID/READY O RDS-ID/READY output (negative polarity)
REFERENCE
VOLTAGE
ANTI ALIASING
FILTER
SMOOTHING
FILTER
CLOCK
RECOVERY
(1187.5Hz)
DATA
DECODER
RAM
(128-bits)
RDS-ID
DETECT
57kHz
BPF
(SCF)
+
-
Vddd
Vdda
Vssa
MPXIN
Vssd
RDDA
RDCL
MODE
RST
RDS-ID
/
READY
CLK(4.332MHz)
OSC
XIN
XOUT
TEST
TEST
FLOUT
VREF
VREF
CIN
PLL
(57kHz)
+5V
+5V

JVC UX-P55 Specifications

General

Brand	JVC
Model	UX-P55
Category	Stereo System
Language	English