MC68HC05P18 Datasheet, PDF (44/144 Pages) Freescale Semiconductor, Inc – Advance Information

Interrupts
Freescale Semiconductor, Inc.
FROM RESET
Y
IS I BIT
SET?
N
IRQ
Y
INTERRUPT?
N
TIMER
Y
INTERRUPT?
N
FETCH NEXT
INSTRUCTION
SWI
Y
INSTRUCTION?
N
RTI
Y
INSTRUCTION?
N
EXECUTE INSTRUCTION
CLEAR IRQ
REQUEST
LATCH
STACK
PC, X, A, CC
SET
I BIT IN CCR
LOAD PC FROM:
SWI: $3FFC, $3FFD
IRQ: $3FFA–$3FFB
TIMER: $3FF8–$3FF9
RESTORE RESISTERS
FROM STACK
CC, A, X, PC
Figure 4-1. Interrupt Processing Flowchart
Advance Information
44
MC68HC(8)05P18 — Rev. 2.0
Interrupts
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