Read Sony HCD-W550 / MHC-W550 / MHC-W770AV Service Manual online
4-14. IC PIN FUNCTION
• IC101 SYSTEM CONTROL (UPD780016YGF-016-3BA)
• IC101 SYSTEM CONTROL (UPD780016YGF-016-3BA)
— 40 —
Pin No.
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
41
42
43
44
45
46
47
48
49
50
I/O
—
O
O
O
O
O
O
—
—
O
I
—
—
—
I
—
—
I
O
I
—
—
—
—
I
I
I
I
I
I
I
—
—
I
—
O
—
—
—
—
—
I
—
—
—
O
O
O
O
O
Description
Not used.
LED control.
LED control.
LED control.
LED control.
LED control.
LED control.
Not used.
Ground.
X’tal (5MHz).
X’tal (5MHz).
5V.
Not used.
Not used.
Reset signal input.
Not used.
Not used.
CD Q data request.
Soft operation check port.
AC power supply check.
Not used.
Not used.
5V.
5V.
CD adjustment port.
Reel pulse detection.
Reel pulse detection.
Cassette half detection.
Key input.
Key input.
Key input.
Not used.
Ground.
CD data input.
Not used.
Clock for data input.
Not used.
Ground.
Ground.
Ground.
Not used.
BD status input.
Ground.
Not used.
Not used.
CD power.
CD data output.
CD clock.
LED control.
LED control.
Pin Name
NC
LED 1
LED 2
LED 5
LED 6
LED 3
LED 4
NC
Test
X2
X1
Vdd
XT2
XT1
Reset
NC
NC
SCOR
SOFT TEST
AC CUT
NC
NC
Vdd
AVdd
ADJ
A SHUT
B SHUT
B-HALF
KEY A
KEY B
KEY C
ADJ 2
AVSS
SQ DATA IN
NO USE
SQ CLK
CD-FUNC
NC
NC
VSS
LED 20
SENSE2
COM D IN
COM D OUT
COM CLK
CD POWER
CD DATA
CD CLK
LED 19
LED 18
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