Read Sony SCD-XB940 (serv.man2) Service Manual online
18
• MAIN BOARD IC612 CXD9515Q (EXPANDER)
Pin No.
Pin Name
I/O
Description
1
VDD
—
Power supply terminal (+3.3V)
2
NC
—
Not used (open)
3
RST
I
Reset signal input from the system controller (IC605) “L”: reset
4
XFBSY
I
Busy signal input terminal “L”: busy
5
NFBSY
I
Not used (fixed at “H”)
6
NFCLE
O
Not used (open)
7
NFALE
O
Not used (open)
8
NFCE
O
Not used (open)
9
NFRE
O
Not used (open)
10
NFWE
O
Not used (open)
11
NFWP
O
Not used (open)
12 to 19
NFD0 to NFD7
I/O
Not used (open)
20
VDD
—
Power supply terminal (+3.3V)
21
GND
—
Ground terminal
22
XIFBSY
I
Busy signal input from the display controller (IC203) “L”: busy
23
XECS
O
Chip select signal output to the EEPROM (IC600)
24
XEWC
O
Write control signal output to the EEPROM (IC600)
25
XEBSY
I
Busy signal input from the EEPROM (IC600) “L”: busy
26
DACRST
O
Not used (open)
27
57RST
O
Not used (open)
28
01CS
O
Not used (open)
29, 30
01IT0, 01IT1
I
Not used (open)
31
01RST
O
Not used (open)
32
KRRST
O
Not used (open)
33
XKRDY
I
Not used (fixed at “H”)
34
KARLT
O
Not used (open)
35
CLAPBSY
I
Not used (fixed at “H”)
36
CLAPSW1
O
Not used (open)
37
CLAPSW0
O
Not used (open)
38
OTASUKE
I
Not used (fixed at “H”)
39
NC
—
Not used (open)
40
VDD
—
Power supply terminal (+3.3V)
41, 42
GND
—
Ground terminal (digital system)
43
NC
—
Not used (open)
44
SMC
I
Not used (fixed at “L”)
45
SIN
I
Not used (fixed at “L”)
46
SOT
O
Not used (open)
47
SCK
I
Not used (fixed at “L”)
48
AMC
I
Not used (fixed at “L”)
49
MAMUTE
O
Not used (open)
50
MICMUTE
O
Not used (open)
51
EUROV/Y
O
Not used (open)
52
RGBSEL
O
Not used (open)
53
VS
O
Not used (open)
54
FCSON
I
Function control signal input from the servo digital signal processor (IC607)
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