— 72 —
Pin Name
V
DD
LED8/
SUPER TWEETER ON
LED7, 6
LED5–1
RESET
X2
X1
IC (Vpp)
XT2
JOG B
V
DD
LED10, 9
KEY SEL
VOL B
REQ. GM
CLK MG
DATA GM
DATA MG
AVss
SPEANA 4–1
KEY 4–1
AV
DD
AV
REF
VOL A
JOG A
RDY MG
SIRCS
Vss
SEG7–1
GR14–1
Pin No.
1
2
3, 4
5–9
10
11
12
13
14
15
16
17, 18
19
20
21
22
23
24
25
26–29
30–33
34
35
36
37
38
39
40
80–86
87–100
I/O
—
O
O
O
I
O
I
—
I
I
—
O
O
I
O
I
O
I
—
I
I
—
—
I
I
I
I
—
O
O
Function
+5V
LED drive signal output./Super tweeter ON/OFF control output.
Not used.
LED drive signal output.
Reset signal input.
X’tal (4 MHz).
Ground
Not used.
AMS encoder signal input.
+5V
LED drive signal output.
Key select control.
Volume encoder signal input.
Reguest signal from/to master control.
Serial clock input.
Serial data output.
Serial data input.
Ground
Spectram analizer signal input.
Key matrix input.
+5V
Volume encoder signal input.
AMS encoder signal input.
Ready signal from master control.
SIRCS signal input.
Ground
CD door open detection input.
LED select signal output.
LED drive signal output.
+5V
Not used.
LED drive signal output.
LED drive signal output.
FL segment signal output.
–25V for FL
FL segment signal output.
FL grid signal output.
6-22. IC PIN FUNCTIONS
• IC501 DISPLAY CONTROL (ASD0204GF-012-3BA)/PANEL board
• Abbreviation
FL : Fluorescent Indicator Tube
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