NEC switch - Manual (Page 165)

CHAPTER 11 INTERRUPT FUNCTIONS
User’s Manual U12978EJ3V0UD
165
Figure 11-1. Basic Configuration of Interrupt Function
(A) Internal non-maskable interrupt
Internal bus
Interrupt request
Vector table
address generator
Standby release signal
(B) Internal maskable interrupt
MK
IF
IE
Internal bus
Interrupt request
Vector table
address generator
Standby release signal
(C) External maskable interrupt
MK
IF
IE
Internal bus
INTM0, KRM00
Interrupt
request Edge
detector
Vector table
address generator
Standby
release signal
IF: Interrupt request flag
IE: Interrupt enable flag
MK: Interrupt mask flag
INTM0: External interrupt mode register 0
KRM00: Key return mode register 00