Pin No. Terminal
Name
I/O Function
24 P76 O It connects with Pin No.25.
25 P75 I It connects with Pin No.24.
26 P74 I It connects with Pin No.27.
27 P73 I It connects with Pin No.26.
28 P72 I/O The rotation pulse output
for turntables
29 P71 - Not used. (Open)
30 P70 O The stroboscope output
for turntables
31 P67 - Not used. (Open)
32 P66 - Not used. (Open)
33 P65 O CP Light Emitting Diode
address 1
34 P64 O CP Light Emitting Diode
address 0
35 P63 O Receiving data for SC
DSC25
36 P62 I Transmitting data for SC
DSC25
37 P61 - Not used. (Open)
38 P60 - Not used. (Open)
39 P57 - Not used. (Open)
40 P56 - Not used. (Open)
41 P55 I Not used. (’L’)
42 P54 - Not used. (Open)
43 P53 - Not used. (Open)
44 P52 O RD signal output for
external bus
45 P51 O UB signal output for SRAM
46 P50 O WR signal output for
external bus
47 P47 I/O Not used. (Open)
48 P46 I/O Not used. (Open)
49 P45 I/O Not used. (Open)
50 P44 O Not used. (Open)
51 P43/A19 O The address bus signal
for external bus
52 P42/A18 O The address bus signal
for external bus
53 P41/A17 O The address bus signal
for external bus
54 P40/A16 O The address bus signal
for external bus
45
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