82
(14)
(12)
(10)
(6)
(4)
(2)
(1)
(5)
(7)
(9)
(13)
Interrupt service
routine instruction
prefetch
Internal
operation
Vector fetch
Stack
Instruction
prefetch
Internal
operation
Interrupt
acceptance
Interrupt level determination
Wait for end of instruction
Interrupt request
signal
Internal address
bus
Internal read
signal
Internal write
signal
Internal data
bus
ø
(3)
(1)
Instruction prefetch address (not executed; saved PC contents (return address))
(2), (4)
Instruction code (not executed)
(3)
Instruction prefetch address (not executed)
(5) SP
–
2
(7) SP
–
4
(6), (8)
Saved PC and saved CCR
(9), (11)
Vector address
(10), (12)
Interrupt service routine start address (vector address contents)
(13)
Interrupt service routine start address ((13) = (10), (12))
(14)
First instruction of interrupt service routine
(8)
(11)
Figure 3.7 Interrupt Exception Handling
Содержание H8S/2670
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