Ic501 Graphic Control (Μpd78042Fgf-027-3B9) - Sony HCD-GR5 Service Manual

6-14. IC PIN FUNCTIONS
• IC501 GRAPHIC CONTROL (µPD78042FGF-027-3B9)
Pin No. Pin Name
1 to 7 GR7 to 1
8 V
DD
9, 10 LED9, 10
11 KEY SELECT
12 VOL IN B
13 REQ GM
14 CLK MG
15 DATA GM
16 DATA MG
17 RESET
18 PANEL SW
19 LED SELECT
20 AV
SS
21 to 24 SPEANA IN1 to 4
25 to 28 KEY IN1 to 4
29 AV
DD
30 AV
REF
31 JOG IN B
32 XT2
33 V
SS
34 X1
35 X2
36 to 39 LED8 to 5
40, 41 LED4,3
42, 43 LED2,1
44 VOL IN A
45 JOG IN A
46 RDY MG
47 SIRCS IN
48 IC (VPP)
49, 50 LED12, 13
51 LED11
52 V
DD
53 to 70 SEG22 to 5
71 V. LOAD
72 to 75 SEG4 to 1
76 to 80 GR12 to 8
I/O
O
Fluorescent indicator tube grid signal output.
–
+5V
O LED drive signal output
O
Not used. (Open)
I Volume encoder signal input.
I/O
Request signal from/to master control.
I
Serial clock input.
O Serial data output to master control.
I
Serial data input from master control.
I Reset signal input.
I
CD door open detection input. (Not used) (Open)
O
LED select signal output.
–
Ground
I
Spectram analizer signal input. (Connected to ground)
I Key matrix input.
–
+5V
–
Jog dial encoder signal input.
I
Not used. (Open)
I
Ground
–
I
X'tal (5 MHz).
O
O LED drive signal output. (Not used) (Open)
O
LED drive signal output.
O
Volume encoder signal input.
I
Jog dial encoder signal input.
I
Ready signal from master contorl.
I
SIRCS signal input.
I
Ground
–
O
LED drive signal output.
O
+5V
–
Fluorescent indicator tube segment signal output.
O
– –25V for Fluorescent indicator tube.
Fluorescent indicator tube segment signal output.
O
Fluorescent indicator tube grid signal output.
O
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Function