Sony CDP-CX55, Service Manual

Page: 43 / 60

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7-14. IC PIN FUNCTIONS
• IC501 SYSTEM CONTROL (CXP84340-051Q)
Pin No. Pin Name I/O Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
I
I
I
O
O
O
O
I
I
I
–
–
–
–
–
I
I
I
SRAM address output
SRAM address output
SRAM address output
SRAM address output
SRAM address output
SRAM address output
SRAM address output
SRAM address output
SRAM address output
SRAM address output
SRAM address output
SRAM address output
SRAM write enable pin
Loading motor out
Loading motor in
Table motor
Table motor
PLAY LED output
PAUSE LED output
POWER LED output
MEGA CONTROL LED output
Fluorescent indicator tube driver IC latch output
JOG input
JOG input
Front cover close sw
Fluorescent indicator tube driver IC clock output
Fluorescent indicator tube driver IC data output
2nd input pin, mute output
5V
Reset input
10Mhz supply pin
10Mhz supply pin
Ground
Not used
Ground
Ground
+5V power supply
Key input 0
Key input 1
Key input 2
A3
A4
A5
A6
A7
A12
A14
A11
A10
A9
A8
A13
WE
LD OUT
LD IN
TBL L
TBL R
LED (PLAY)
LED (PAUSE)
LED (POWER)
LED (MEGA)
FLLT
JOG1
JOG2
DOOR SW
FLCK
FLDT
ZMUTE
ICSW
RESET
EXTAL
XTAL
V
SS
TX
TEX
AVSS
AVREF
KEY0
KEY1
KEY2