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µPD750008 USER'S MANUAL
Figure 6-10. Block Diagram of the INT2 and KR0 to KR7 Circuits
INT2/P12
KR7/P73
KR6/P72
KR5/P71
KR4/P70
KR3/P63
KR2/P62
KR1/P61
KR0/P60
IM2
4
Input buffer
Internal bus
Selector
Rising edge 
detection 
circuit
Falling edge 
detection 
circuit
INT2
(IRQ2 set signal)
IM20, IM21