JVC KD-S871R Service Manual page 28

KD-S871R
SAA6579T-X(IC71):RDS detecter
1.Pin layout
QUAL
DATA
Vref
MUX
vdd
GND
CIN
SCOUT
2.Block diagram
4
8
7
5
3
3.Pin function
Pin No.
10
11
12
13
14
15
16
1-28
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CLK
1 16
T57
2
15
OSCO
3
14
OSCI
4
13
5 vdd
12
GND
6 11
TEST
7 10
MODE
8 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
Symbol
1 QUAL Quality indication output
2 DATA RDS data output
3 Vref Reference voltage output (0.5VDDA)
4 MUX Multiplex 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
TEST Test enable input
GND Ground for digital part (0V)
vdd +5V supply voltage for digital part
OSCI Oscillator input
OSCO Oscillator output
T57 57 kHz clock signal output
CLK RDS clock output
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13 14
OSCILLATOR
RECONSTRUCTION
AND
FILTER
DIVIDER
BIPHASE
SYMBOL
DECODER
TEST LOGIC AND OUTPUT
SELECTOR SWITCH
9 10
Description
12
1
QUALITY BIT
GENERATOR
2
DIFFERENTIAL
DECODER
15
15
11