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Ic Pin Function Description - Sony XA-300 - Aux In Selector Service Manual

Aux-in selector
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XA-300
• IC Block Diagrams
IC2 BA8272F-E2
14
13
12
11
10
9
8
RESET
SWITCH
1
2
3
4
5
6
7
IC3 PCM2702E/2K
28
27
26
25
24
23
22
USB
PACKET
AUDIO
DATA
DATA
FIFO
8X
WRCLK
OVERSAMPLING
DIGITAL FILTER
MODULATOR
SYSTEM CLOCK
AUDIO
SpAct
TM
CLOCK
GENERATOR
MCLK
USB
CLOCK
GENERATOR
CRYSTAL
OSC
1
2
3
IC7 LA4536M-TE-R
POWER
MUTE
POWER
MUTE
1
10
SWITCH
SWITCH
CIRCUIT
SWITCH
IN1
2
AMP
9
OUT1
PRE
POWER
3
8
GND
GND
IN2
4
AMP
7
OUT2
REF
5
BIAS
6
VCC
21
20
19
18
17
16
15
LOW-PASS
DAC
MULTI-
FILTER
LEVEL
DELTA-
SIGMA
LOW-PASS
DAC
FILTER
POWER SUPPLY
USB
I/F
4
5
6
7
8
9
10
11
12
13
14
3-4.

IC PIN FUNCTION DESCRIPTION

• IC1 CXP83412-053Q (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
1
MODE_SW
I
CD, AUX display change "H": CD (fixed at "L" in this set)
2
NIL
I
Not used (fixed at "L")
3
USB_ON
O
USB power supply switch (Turn on the power when USB in selected by PAS)
4
NCO
O
Not used (open)
5
POWER ON
O
Power on signal output terminal (Turn on the power when AUX1, AUX2 or USB is selected)
6
NCO
O
Not used (open)
7
BUS_CLK
I
Serial data transfer clock signal input from the SONY bus interface (IC2)
8
BUS_SI
I
Serial data input from the SONY bus interface (IC2)
9
BUS_SO
O
Serial data output the SONY bus interface (IC2)
10, 11
NCO
O
Not used (open)
12
LINK_OFF
O
Bus link off control signal output terminal
13
NCO
O
Not used (open)
14
ATT
O
Audio line muting on/off control signal output terminal "H": muting on
15
NCO
O
Not used (open)
16
AUDIO_SEL1
O
Audio signal selector control *1
17
NCO
O
Not used (open)
18
AUDIO_SEL2
O
Audio signal selector control *1
19
NCO
O
Not used (open)
20
AUDIO_SEL3
O
Not used (open)
20 to 29
NCO
O
Not used (open)
30
RESET
I
System reset signal input from the reset signal generator (IC8) "L": reset
31
EXTAL
I
Main system clock input terminal (10MHz)
32
XTAL
O
Main system clock output terminal (10MHz)
33
GND
Ground terminal
34
VL
O
Not used (open)
35 to 37
VLC3-1
I
Not used (Ground connection)
38 to 71
NCO
O
Not used (open)
72
VDD
Power supply terminal (+5V)
73
SUB CLOCK
O
Sub system clock output terminal Not used (open)
74
SUB CLOCK
I
Sub system clock input terminal Not used (open)
75
NC
Connected to the power supply (+5V)
76
NCO
O
Not used (open)
77
NCO
O
Not used (open)
78
BU_CHECK
I
Backup power supply detection signal input terminal "H": active
79
BUS_ON
I
Bus on/off control signal input from the SONY bus interface (IC2)
80
NIL
I
Not used (fixed at "L")
*1
Source mode
AUX1
Terminal
AUDIO_SEL1 (pin qh)
"H"
AUDIO_SEL2 (pin qk)
"H"
6
6
Description
AUX2
USB
CD-C
"L"
"L"
"H"
"L"
"H"
"L"

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