NEC PD78214 - Manual (Page 343)

314
µ
PD78214 Sub-Series
Fig. 12-11 Example of Handling an Interrupt Request When an Interrupt Is Already Being Handled (1/2)
Main routine
Processing a
Vectored interrupt request e
(high priority)
→
Vectored interrupt request a
(low priority)
→
Processing b
Processing c
Processing d
→
Macro service
request b
→
Macro service
request d
→
Vectored interrupt
request c
(high priority)
Processing e
Processing f
Processing h
Processing g
→
→
Macro service
request h
Macro service
request f
EI
[Nesting 1] [Nesting 2] [Nesting 3]
← Vectored interrupt request g (low priority): Pending
EI