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CBM-202PC-04 User's Manual
The Gate Array ports are mainly used to provide an 8-bit parallel interface.
When the parallel interface is not used, pull up STB(Pin 52) of the Gate Array with a 10k
resistor.
STB(Pin 87) of the CPU should be connected to INTR(Pin 56) of the Gate Array or pulled up with a 10k
resistor.
1) Circuit
21
CITIZEN
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