Datasheet

RL78/L12 CHAPTER 17 INTERRUPT FUNCTIONS
R01UH0330EJ0200 Rev.2.00 717
Dec 13, 2013
Figure 17-7. Interrupt Request Acknowledgment Processing Algorithm
Yes
No
Yes
Yes (High Priority)
No
Yes
No
No
Yes
No
IE = 1?
Vectored interrupt servicing
Start
××IF = 1?
××MK = 0?
(××PR
1, ××PR0)
(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?
≥
××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 (see Figure 17-6)
Note For the default priority, refer to Table 17-1 Interrupt Source List.