Pioneer KEH-1940, Руководство по обслуживанию

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37
KEH-1940,1960
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Pin Functions(PDC045A)
Pin No. Pin Name I/O Function and Operation
1–4 NC Not used
5–8 KS4-1 O Key strobe output
9–12 KD4-1 I Key data input
13 SI I Display data input
14 SO O Key data output
15 SCK I/O Clock input terminal for serial data input and output
16 REMIN I Remote control reception
17 RES I Reset input
18 TEST I Test input
19 OSC-IN I System clock input
20 OSC-OUT O System clock output
21 GND GND
22,23 VDD2,1 LCD power supply
24 VDD Power supply
25–28 COM1-4 O LCD common signal
29–42 SEG1-14 O LCD segment signal
43–48 NC Not used
12
13
24
25
36
37
48
1
*PDC045A
IC's marked by* are MOS type.
Be careful in handling them because they are very
liable to be damaged by electrostatic induction.
Format Meaning
C C MOS
19
20
32
33
51
52
64
1
*PE5107A