JVC KS-FX945R Service Manual page 32

6.10 SAA6579T-X (IC71):RDS detecter
• Pin layout
QUAL
1
DATA
2
Vref
3
MUX
4
V
dd 5
GND
6
CIN
7
SCOUT
8
• Block diagram
4
8
7
5
3
• Pin function
Pin No. Symbol
1 QUAL Quality indication output
2 DATA RDS data output
3 Vref Reference voltage output (0.5VDDA)
4 MUX Multiolex signal input
5 Vdd +5V supply voltage for analog part
6 GND Ground for analog part (0V)
7 CIN Sub carrier input to comparator
8 SCOUT Sub carrier output of reconstruction filter
9 MODE Oscillator mode / test control input
10 TEST Test enable input
11 GND Ground for digital part (0V)
12 Vdd +5V supply voltage for digital part
13 OSCI Oscillator input
14 OSCO Oscillator output
15 T57 57 kHz clock signal output
16 CLK RDS clock output
1-32 (No.49875)
CLK
16
T57
15
OSCO
14
OSCI
13
V
12 dd
GND
11
TEST
10
MODE
9
ANTI-
57 kHz
ALIASING
BAND PASS
FILTER (8th ORDER)
COSTAS LOOP
CLOCKED
VARIABLE AND
COMPARATOR
FIXED DIVIDER
VP1
CLOCK
REFERENCE
REGERATION
VOLTAGE
AND SYNC
6
Description
13
OSCILLATOR
RECONSTRUCTION
AND
FILTER
DIVIDER
BIPHASE
SYMBOL
DECODER
TEST LOGIC AND OUTPUT
SELECTOR SWITCH
9
14 12
1
QUALITY BIT
GENERATOR
2
DIFFERENTIAL
DECODER
15
15
10 11