JVC KD-SC800R Service Manual page 36

KD-SC800R
4.8 SAA6579T-X (IC71):RDS detecter
• Pin layout
QUAL
DATA
Vref
MUX
V
GND
CIN
SCOUT
• Block diagram
• Pin function
Pin No. Symbol
1 QUAL
2 DATA
3 Vref
4 MUX
5 Vdd
6 GND
7 CIN
8 SCOUT
9 MODE
10 TEST
11 GND
12 Vdd
13 OSCI
14 OSCO
15 T57
16 CLK
1-36 (No.49820)
CLK
1 16
T57
2
15
OSCO
3 14
OSCI
4
13
V
dd 5 12 dd
GND
6 11
TEST
7 10
MODE
8 9
ANTI-
57 kHz
4
ALIASING
BAND PASS
FILTER (8th ORDER)
8
COSTAS LOOP
7
CLOCKED
VARIABLE AND
COMPARATOR
FIXED DIVIDER
5
VP1
CLOCK
3
REFERENCE
REGERATION
VOLTAGE
AND SYNC
6
Description
Quality indication output
RDS data output
Reference voltage output (0.5VDDA)
Multiolex signal input
+5V supply voltage for analog part
Ground for analog part (0V)
Sub carrier input to comparator
Sub carrier output of reconstruction filter
Oscillator mode / test control input
Test enable input
Ground for digital part (0V)
+5V supply voltage for digital part
Oscillator input
Oscillator output
57 kHz clock signal output
RDS clock output
13 14
OSCILLATOR
RECONSTRUCTION
AND
FILTER
DIVIDER
BIPHASE
SYMBOL
DECODER
TEST LOGIC AND OUTPUT
SELECTOR SWITCH
9 10
12
1
QUALITY BIT
GENERATOR
2
DIFFERENTIAL
DECODER
15
15
11