Ic Pin Function Description - Sony XA-300 Service Manual

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"