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• IC501 CXP82612-021Q (MASTER CONTROL)
Pin No. Pin Name I/O Function
1 TIMER – Connected to +5V.
2 RM I Audio bus input
3 +5V – Connected to +5V.
4-6 – – Not used. (Open)
7 PGML O Latch signal output to digital filter (IC201).
8 CLK O Serial clock output
9 SENSE I SENSE signal input
10 DATA O Serial data output
11 SQCK O Read out clock output for subcode Q data.
12 SUBQ I Subcode Q data input
13 – – Not used. (Open)
14 AMUTE O Analog muting control signal output
15 LDON O Optical pick-up laser diode control output
16 XLT O Serial data latch signal output
17 – – Not used. (Open)
18 RV+ – Not used. (Open)
19 RV- – Not used. (Open)
20 LDOUT O Loading motor control signal output
21 LDIN I Loading motor control signal input
22 KEY0 I Key input (S530)
23 KEY1 I Key input (S520-S527)
24 KEY2 I Key input (S501-S506)
25 KEY3 – Connected to +5V.
26,27 KEY4,KEY5 I Key input (S531)
28 ADJ/AFADJ – ADJ/AFJ test pin
29 IN/OUTSW I Loading IN/OUT switch input
30 RST I Reset signal input
31 EXTAL I Clock input (4MHz)
32 XTAL O Clock output (4MHz)
33 VSS – Ground
34-41 – – Not used. (Open)
42-62 S1-S21 O FL segment output
63-70 1G-7G O FL grid output
71 VFDP(-30V) – -30V pin for FL display tube.
72 VDD(+5V) – +5V pin
73 +5V – +5V pin
74 SEL1 – Connected to Ground.
75-77 – – Connected to Ground.
78 SCOR I Read out timing signal input for subcode Q data.
79,80 SEL2,SEL3 – Connected to +5V.
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