NEC 78K0 Series User Manual page 490

(C) External maskable interrupt (INTKR)
Interrupt
request
1 when KRMn = 1 (n = 0 to 7)
(D) Software interrupt
Interrupt
request
IF: Interrupt request flag
IE: Interrupt enable flag
ISP: In-service priority flag
MK: Interrupt mask flag
PR: Priority specification flag
KRM: Key return mode register
490
CHAPTER 19 INTERRUPT FUNCTIONS
Figure 19-1. Basic Configuration of Interrupt Function (2/2)
Internal bus
MK
Key
IF
interrupt
detector
Preliminary User's Manual U17260EJ3V1UD
IE PR ISP
Priority controller
Internal bus
Vector table
Priority controller
address generator
Vector table
address generator
Standby release signal