Renesas RL78/F14

RL78/F13, F14 CHAPTER 21 INTERRUPT FUNCTIONS
R01UH0368EJ0210 Rev.2.10 1506
Dec 10, 2015
Figure 21-11. Interrupt Request Acknowledgment Processing Algorithm
IF: Interrupt request flag
MK: Interrupt mask flag
PR0: Priority specification flag 0
PR1: Priority specification flag 1
IE: Flag that controls acknowledgment of maskable interrupt request (1 = Enable, 0 = Disable)
ISP0, ISP1: Flag that indicates the priority level of the interrupt currently being serviced
Note For the default priority, see Table 21-1 Interrupt Source List.
Yes
No
Yes
No
Yes
No
No
Yes
No
IE = 1?
Vectored interrupt servicing
Start
××IF = 1?
××MK = 0?
(××PR
1, ××PR 0)
(ISP1, ISP0)
Yes (interrupt request generation)
No (Low priority)
Interrupt request held pending
Interrupt request held pending
Interrupt request held pending
Interrupt request held pending
Interrupt request held pending
Higher priority
than other interrupt requests
simultaneously
generated?
Higher default priority
Note
than other interrupt requests
simultaneously
generated?
≥
Yes (High priority )