NEC PD754144 - Manual (Page 187)

CHAPTER 7 INTERRUPT AND TEST FUNCTIONS
187
User’
s Man
ual U10676EJ3V0UM
Figure 7-1. Block Diagram of Interrupt Controller
Notes 1. Noise eliminator (Standby release is disable when noise eliminator is selected.)
2. Does not have the INT2 pin. The interrupt request flag (IRQ2) is set at the KRn pin falling edge when IM20 = 1 and IM21 = 0.
Internal bus
Interrupt enable flag (IE ×××)
2 4
IM2 IM0
Note1
Edge
detector
INT0/P61
INTBT
INTT0
INTT1
INTT2
INTEE
IRQBT
IRQ0
IRQT0
IRQT1
IRQT2
IRQEE
IRQ2
KR4/P70
KR7/P73
Falling edge
detector
Note2
Key return reset circuit
IM2
IME IPS IST1 IST0
Decoder
VRQn
Priority controller
Standby release
signal
Selector Vector table
address
generator