Renesas RL78/G15

RL78/G15 CHAPTER 14 INTERRUPT FUNCTIONS
R01UH0959EJ0110 Rev.1.10 Page 615 of 765
Mar 7, 2023
Figure 14-7. Interrupt Request Acknowledgment Processing Algorithm
Yes
Yes (interrupt request generation)
Yes
No (low priority)
Yes
No
No
Yes (high priority)
Yes
Start
××IF = 1?
××MK = 0?
(xxPR1, xxPR0)
≤ (ISP1, ISP0)
Is priority higher than other
interrupt requests simultaneously
generated?
Is default priority
Note
1
higher than other interrupt requests
with the same priority simultaneously
generated?
IE = 1?
Vectored interrupt servicing
Interrupt request
held pending
Interrupt request
held pending
Interrupt request
held pending
No
Interrupt request
held pending
No
Interrupt request
held pending
No
xxIF:
Interrupt request flag
xxMK:
Interrupt mask flag
xxPR0:
Priority specification flag 0
xxPR1:
Prior
ity 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 (see
Figure 14-6)
Note 1. For the default priority, refer to Table 14-1 Interrupt Source List.