Section 5 Interrupt Controller
Rev. 1.00 Apr. 28, 2008 Page 124 of 994
REJ09B0452-0100
5.6.3
Interrupt Exception Handling Sequence
Figure 5.10 shows the interrupt exception handling sequence. The example shown is for the case
where interrupt control mode 0 is set in advanced mode, and the program area and stack area are
in on-chip memory.
(14)
(12)
(10)
(6)
(4)
(2)
(1)
(5)
(7)
(9)
(11)
(13)
Prefetch of
instruction in
interrupt
handling routine
Vector fetch
Stack access
Instruction
prefetch
Internal
processing
Internal
processing
Interrupt is
accepted
Interrupt level
determination and
wait for end of
instruction
Interrupt request signal
Internal address bus
Internal read signal
Internal write signal
Internal data bus
φ
(3)
(1)
(2) (4)
(3)
(5)
(7)
Instruction prefetch address (Not executed.
Address is saved as PC contents, becoming
return address.)
Instruction code (Not executed.)
Instruction prefetch address (Not executed.)
SP – 2
SP – 4
Saved PC and CCR
Vector address
Start address of interrupt handling routine (contents of
vector address)
Start address of interrupt handling routine ((13) = (10) (12))
First instruction in interrupt handling routine
(6) (8)
(9) (11)
(10) (12)
(13)
(14)
(8)
Figure 5.10 Interrupt Exception Handling
Содержание H8S/2100 Series
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