Read Sharp CD-C471H (serv.man13) Service Manual online
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CD-C471H
1
VREF
Output
Reference voltage output (Vdda/2)
2
MPXIN
Input
Base band (multiplex) signal input
3
Vdda
—
Analog system power supply (+5V)
4
Vssa
—
Analog system ground
5
FLOUT
Output
Sub-carrier input (comparator input)
6
CIN
Input
Sub-carrier output (filter output)
7
T1
Input
Test input (to be always connected to ground)
8
T2
Input
Test input (standby control)
0: Normal operation/1: Standby state (crystal oscillation stop)
0: Normal operation/1: Standby state (crystal oscillation stop)
9*
T3 (RDCL)
Input/Output
Test I/O (RDS clock output)
10*
T4 (RDDA)
Input/Output
Test I/O (RDS data output)
11 *
T5 (RSFT)
Input/Output
Test I/O (Soft judgment control data output)
12
XOUT
Output
Crystal oscillation output
13
XIN
Input
Crystal oscillation input (external reference signal input)
14
Vddd
—
Digital system power supply
15
Vssd
—
Digital system ground
16*
T6 (ERROR/57K/BE1)
Input/Output
Test I/O (Error existence/nonexistence output/playback carrier output/error block
number output)
number output)
17*
T7 (CORREC/ARI-ID/BE0
Input/Output
Test I/O (Error existence/nonexistence output/SK detection output/error block
number output)
number output)
18*
SYNC
Input/Output
Block sync detection output
19*
RDS-ID
Output
RDS detection output
20
DO
Output
Data output
21
CL
Input
Clock input
Serial data interface (CCB)
22
DI
Input
Data input
23
CE
Input
Chip enable
24
SYR
Input
Sync and RAM address reset (positive logic)
ICT21 VHiLC72720/-1:RDS Decorder (LC72720)
Terminal Name
Pin No.
Input/Output
Function
Figure 57 BLOCK DIAGRAM OF IC
Vdda
VREF
VREF
FLOUT CIN
Vssa
Vddd
Vssd
RDS-ID
SYNC
SYR
XOUT
XIN
MPXIN
DO
CL
DI
CE
CL
DI
CE
T1
T2
T3~T7
REFERENCE
VOLTAGE
57kHz
BPF
(SCF)
ANTIALIASING
FILTER
CCB
TEST
SMOOTHING
FILTER
RAM
(24 BLOCK DATA)
ERROR CORRECTION
(SOFT DECISION)
PLL
(57kHz)
CLOCK
RECOVERY
(1187.5Hz)
DATA
DECODER
SYNC
DETECT-1
OSC/DIVIDER
MEMORY CONTROL
CLK(4.332MHz)
SYNC
DETECT-2
SYNC/EC CONTROLLER
1
5
6
3
4
2
20
21
22
23
7
8
9,10,11
16,17
16,17
13
12
24
18
19
15
14
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
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