Ic Pin Functions - Sony HCD-GR3 Service Manual

6-15. IC PIN FUNCTIONS

• IC501 GRAPHIC CONTROL (ASD042FGF-022-3B9)
Pin No. Pin Name
GR1 – GR7
1 – 7
8 V
DD
LED9, LED10
9, 10
11 KEY SELECT
VOL IN B
12
REQ. GM
13
14 CLK MG
DATA GM
15
16 DATA MG
17 RESET
18 PANEL SW
19 LED SELECT
AVss
20
21 – 24 SPEANA IN1 – 4
KEY IN1 – 4
25 – 28
29 AV
DD
30 AV
REF
JOG IN B
31
32 XT2
Vss
33
34 X1
35 X2
36, 37 LED7, LED8
38, 39 LED5, LED6
LED1 – LED4
40 – 43
44 VOL IN A
JOG IN A
45
46 RDY MG
47 SIRCS IN
IC (VPP)
48
49 – 51 LED11 – LED13
V
52
DD
SEG5 – SEG22
53 – 70
71 V. LOAD
SEG1 – SEG4
72 – 75
76 – 80 GR8 – GR12
• Abbreviation
FL: FLUORESCENT INDICATOR TUBE
I/O
O FL grid signal output
— +5V
O LED drive signal output
O Not used
I Volume encoder signal input
I/O
Reguest signal from/to master control
I Serial clock input
O Serial data output
I Serial data input
I Reset signal input
I CD door open detection input (Not used)
O LED select signal output
— Ground
I Spectram analizer signal input (Connected to ground)
I Key matrix input
—
+5V
—
I Not used (Pull down)
I Not used
— Ground
I
X'tal (5 MHz)
O
O LED drive signal output
O Not used
O LED drive signal output
I Volume encoder signal input
I Not used. (Pull down)
I RDY signal from master control
I SIRCS signal input
— Ground
O LED drive signal output
— +5V
O FL segment signal output
— –25V for FL
O FL segment signal output
O FL grid signal output
— 55 —
Function