81
HCD-GX8000/RG77
Pin No. Pin Name I/O Description
81 VSS-(CPU) —
Ground terminal (for CPU)
82 X1 I
System clock input terminal (4 MHz)
83 X0 O
System clock output terminal (4 MHz)
84 VCC-(CPU) —
Power supply terminal (+3.3V) (for CPU)
85 to 100 G1 to G16 O
Grid drive signal output to the fluorescent indicator tube
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