CHAPTER 17 INTERRUPT FUNCTIONS
User’s Manual U16899EJ2V0UD
359
Figure 17-1. Basic Configuration of Interrupt Function (2/2)
(C) External maskable interrupt (INTKR)
IF
MK
IE
PR
ISP
Internal bus
Interrupt
request
Priority controller
Vector table
address generator
Standby release signal
Key
interrupt
detector
1 when KRMn = 1 (n = 0 to 7)
(D) Software interrupt
Internal bus
Interrupt
request
Priority controller
Vector table
address generator
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
17.3 Registers Controlling Interrupt Functions
The following 6 types of registers are used to control the interrupt functions.
•
Interrupt request flag register (IF0L, IF0H, IF1L, IF1H)
•
Interrupt mask flag register (MK0L, MK0H, MK1L, MK1H)
•
Priority specification flag register (PR0L, PR0H, PR1L, PR1H)
•
External interrupt rising edge enable register (EGP)
•
External interrupt falling edge enable register (EGN)
•
Program status word (PSW)
Table 17-2 shows a list of interrupt request flags, interrupt mask flags, and priority specification flags corresponding
to interrupt request sources.
Содержание MuPD78F0132H
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