MC68HC705JP7 Datasheet, PDF (54/242 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Interrupts
Advance Information
54
Freescale Semiconductor, Inc.
FROM
RESET
YES
I BIT SET?
NO
EXTERNAL ^YES
INTERRUPT?
NO
CORE TIMER ^YES
INTERRUPT?
NO
TIMER
YES
INTERRUPT?
NO
SERIAL
YES
INTERRUPT?
NO
ANALOG
YES
INTERRUPT?
NO
CLEAR IRQ LATCH
STACK PCL, PCH, X, A, CCR
SET I BIT
LOAD PC WITH INTERRUPT VECTOR
FETCH NEXT
INSTRUCTION
SWI
YES
INSTRUCTION?
NO
RTI
YES
INSTRUCTION?
NO
UNSTACK CCR, A, X, PCH, PCL
EXECUTE INSTRUCTION
Figure 4-2. Interrupt Flowchart
MC68HC705JJ7 • MC68HC705JP7 — REV 4
Interrupts
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